Abstract
CLASSIFICATION OF NEMATODES.—Dr. H. H. Cobb sets forth in Nematology (8) a classification of nematodes “based on a study of several hundred genera” and depending chiefly on the characters of the mouth and related organs; and in the following part (9) gives systematic descriptions of about one hundred, mostly free-living, new species of nematodes, which form the type-species of nearly as many new genera. Among the morphological points may be noted the following: the large percentage of species with pointed setæ, the complex distal ends of the cephalic setas in some species indicating their sensory nature, and the presence in a large group of nematodes of six well-developed pharyngeal onchia or spears having an outward stroke and adapted for digging.
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