DR. THORELL deserves our best thanks for having begun a faunistic work on the spiders of Burmah; still greater would have been our gratitude had his minute and exhaustive descriptions been accompanied by figures of the numerous new species recorded. One of the greatest hindrances in the study of exotic araneology is the paucity of such works. The present, however, is not the first contributed, by Dr. Thorell's labours, for the supply of works on the spider-fauna of exotic regions: witness his extensive work, “Studi sui Ragni Malesi e Papuani,” in three volumes, 1877-81, describing and recording over five hundred species of the spiders of that richest of all known exotic regions, the Malay Archipelago. Up to the time of the publication of the present volume, but few Burman spiders were known, the earliest being an Epeirid, described by the late Dr. Stoliczka in 1869. This was followed, in 1878, by two others recorded by Mr. T. Workman, of Belfast; eight more were recorded in 1881 in Dr. Thorell's work above mentioned (on the spiders of the Malay Archipelago); and finally, twenty-two more by M. Eugène Simon in 1884. The total number of species of Burmese Araneidea now known is 163, by far the larger portion being new to science. Dr. Thorell records 145 species, of which go are new to science, and 130 new to Burmah. These figures doubtless give a very meagre idea of the spiders of such a rich zoological district as the Burmese Empire. Not to mention its situation in the tropics, Burmah has much in common with the productions of China, Siam, India, and the Malay Archipelago. We may therefore safely hazard a conjecture that the figures given by Dr. Thorell can scarcely represent a twentieth part of the spiders of Burmah. It is to be hoped that since the—still comparatively few—species as yet known have been collated in the present work, an impetus will be given to natural history collectors to add to our knowledge. For the want of figures in Dr. Thorell's work there is some compensation in the concise diagnoses which head each lengthened description. Excepting the introduction, which is in Italian, the work is written in Latin. It is exceedingly well got up, forming a handsome volume of over 400 pages, and is dedicated to the Rev. O. P. Cambridge, General A. W. M. Van Hasselt, and Dr. Ludwig Koch. The greater part of the Burmese spiders described by Dr. Thorell were collected by Signer Leonardo Fea, mostly in Upper (or North) Burmah; and of the rest some were collected in its southern and some in its central districts. Viaggio di L. Fea in Birmania e regioni vicini. II. “Primo saggio sui Ragni Birmani.” Del Prof. T. Thorell. (Genova: Tipographia del R. Istituto Sordo-Muti, 1887.)