PALEONTOLOGY. 



No. 55. CASE, E. C. A Revision of the Pelycosauria of North America. Quarto, 

 176 pages, 35 plates, 73 text figures. Published 1907. Price $3.00. 



This monograph gives a revision and morphological description of the North 

 American reptiles of the Permian and Upper Carboniferous, especially those from 

 the Red Beds of northern Texas, together with the history of the group. The 

 taxonomy and synonymy are considered with some detail; the location of all types 

 and the original descriptions are given. This is followed by a revised description of 

 all types, by the descriptions of new forms, and a discussion of the biological and 

 geological relations of the group. A bibliography of all important papers is given 

 which, in connection with Hay's Catalogue of the Vertebrata of North America, 

 furnishes a complete bibliography of the group up to the date of publication. 



Nb. 145. CASE, E. C. A Revision of the Cotylosauria of North America. Quarto, 

 122 pages, 14 plates, 52 text figures. Published 1911. Price $3.00. 



This monograph, which is the second in the series dealing with the vertebrate 

 fauna of the Permian or Permo-Carboniferous period in North America, gives a 

 revision and morphological description of the group of primitive reptiles called Co- 

 tylosauria. The same general plan is followed in this work as in the previous vol- 

 ume on the Pelycosauria. The types are redescribed and the original descriptions 

 quoted. Much new material is also described and a scheme of classification is pro- 

 posed which reconciles all the facts now available. Several types which have been 

 found to be indeterminable are so listed. The location and museum number of each 

 type and characteristic specimen are given. A morphological description of each 

 form follows the systematic portion with a discussion of probable relationships and 

 habits. The bibliography includes all papers referred to in the text and all which 

 have been published since the appearance of Hay's Bibliography and Catalogue. 



No. 146. CASE, E. C. A Revision of the Amphibia and Pisces of the Permian 

 of North America. Quarto, 184 pages, 32 plates, 56 text figures. Pub- 

 lished 1911. Price $4.00. 



This is the third monograph of the series on the vertebrate life of the Permian 

 or Permo-Carboniferous period in North America. The method of treatment is 

 the same as in the two previous monographs. A full systematic revision is given 

 for both the amphibians and fishes, followed by a morphological description of 

 each form. The location and museum number of each type and characteristic 

 specimen are recorded. The bibliography is complete, in connection with Hay's 

 "Catalogue and Bibliography of the Vertebrata of North America." The portion 

 upon the fishes is the independent work of Dr. Hussakof, except the part included 

 in the history of work upon the amphibians and fishes. A short article by Dr. E. 

 H. Sellards describes two new cockroaches from the beds in Texas. 



No. 181. CASE, E. C., S. W. WILLISTON and M. G. MEHL. The Permo-Carbonif- 

 erous Vertebrates from New Mexico. Quarto, v-j-81 pages, 1 plate, 51 

 figures. Published 1913. Price $2.00. 



This is a supplementary volume to those published by E. C. Case on the Permo- 

 Carboniferous vertebrates of North America. It contains an account of the ex- 

 ploration of the Permo-Carboniferous beds of El Cobre Canyon near Abiquiu, 

 and those on the Arroyo de Agua, both in Rio Arriba County, New Mexico. Fos- 

 sils of this age were first discovered in New Mexico by James Baldwin over thirty 

 years ago, and specimens found their way into the hands of both Cope and Marsh, 

 who described imperfect material. The result of this exploration was the dis- 

 covery of a large quantity of new material, including some exceptionally perfect 

 specimens. The monograph contains descriptions of new material, corrections of 

 synonymy and of errors of interpretation, and references to all material described 

 elsewhere. The two senior authors collaborated in order to avoid all possible 

 errors and future discussion and are jointly responsible for all statements made by 

 them. Dr. Mehl's part consists in the description of a single specimen. 



59 



