Gorgoderina diaster, Cylindrotaenia am ericana , and Ophiotaenia bona rien sis are reported , and Crep totrema lunch! and Glypthelmins robustus described from Buio marinus from 3 locali ties in th e Republic of Colomb ia. All are new locality records and B. marillll s is a new host for G. diaster and C. am ericana. Creptot rema lijnchi differs from C. creptotte ma in possessing smaller eggs, rela tively smaller oral pap illae and suckers, and elong ate ra ther than spherical testes. Glypthe lm ins ro hustus differs from all other species in the gen us in possessing a pharynx which is significantly larger than th e acetabulum and tegumental spines restr icted to the an terior fif th of the body. If fur ther differs from G. facioi in possessing diagonal testes and slightly smaller eggs, and from G. palminedis in possessing an lshaped excretory vesicle and slightly smaller eggs. Th e known speci es of amphibian platyhelminths from Colombia have affinities with both North and Central as well as South America. Twenty-seven specimen s of Bufo marinus L . co llected from three localities in th e Rep ub lic of Colombia d uring Ju ne 1975 con ta ined sp ecim en s of fiv e species of ad u lt pl atyhel min th s, in cluding tw o previ ously undescribed . H ost specimens have been d eposite d in th e Unive rsity of Kansas M useum. Worms we re removed from the ho st and exam ine d live wi th the aid of a stereoscop e ; trematodes were flatten ed with negligible covers lip pressure, cesto des were relaxed in pond water; all were fixed w ith AFA, sto re d in 70% ethanol, sta ined wi th Mayer's hema toxylin , and m ounted in Canada b alsam. Measu rem ents are in micromete rs unless otherwise sta ted; figures were draw n w ith the aid of a drawing tube . Digenea Allocreadiidae Creptotrerna lynch; sp. n. (Figs. 1-3) Description (base d on 20 spec imens): Body oval to elonga te, 0.85 to 1.49 mm long by 0.39 to 0.67 mm wide; widest at mid body. Tegu ment thin, aspinous. Oral sucker subterminal, 156 to 276 long by 192 to 336 wide, with 2 small dorsolatera l papill ae. Prepharynx short; ph arynx 60 to 84 long by 120 wid e; ceca exten d near posterior end of body. Acetabulum ~ body length from anterior end, 264 to 396 long by 276 to 372 wide. Testes in posterior th ird of body, elongate, symmetrical Received for publication 23 September 1975 . * F unds for this study were provided th rough a gra nt from the National Geographic Society to Dr. Th omas B. Th orson, Un iversity of NebraskaLincoln. 429 to slightly oblique; left testis 300 to 480 long by H)2 to 252 wid e, right testis 32.5 to 540 long by 180 to 265 wid e. Cirru s sac dorsolateral to ace tabulum, 444 to 660 long by 84 to 108 wide; bipartite seminal vesicle, pars prostatica , and eversible cirrus pr esent; cirrus 1.50 by 42, unarmed. Gen ital pore median, anterovcntra l to cecal bifurcation . Short metrat erm present ( not apparent in holotyp e }, uterus short , loop ing between testes and acetab ulum; loops may extend extra ceca lly, Ovary posterolateral to ace tabulum, posterior to cirrus sac, 204 to 264 long by 216 to 288 wide. Vitellaria follicular, extracccal, follicles large, from level of ph arynx to posterior end of body; few interceca l follicles may be present. Vite lline recept acle median, posterodorsal to ootype; semin al receptacle present ; Mehl is' gland pr esent , Laurer's canal not obse rved . Slightly collapsed mature uterine eggs 5.5 to 67 long by ,35 to 38 wide. Excretory pore terminal; vesicle lshaped , may extend to anterior margin of testes. Host : Bufo marillus L. Site: At base of villi in middle porti on of small intestin e. Locality : 1 km north of San Cristobal Atlanti co Colombia . Holotype : USNM Helm. Coli. No. 73484. Para itjpes: USNM Helm. ColI. No. 73485; Univ. Neb, State Mus., H. W. Manter Lab . No. 2025 1.