24 



58 2328 Hay, Oliver P. Descriptions of some Pleistocene 



vertebrates found in the United States. Pp. 83-146. 



12 October 1920. 



58 2352 Barbour, Thomas and G. K. Noble. Amphibians and 



reptiles from southern Peru collected by the Peruvian 

 Expedition of 1914-1915 under the auspices of Yale 

 University and the National Geographic Society. Pp. 

 609-620. 6 January 1921. 



59 2382 Blake, S. F. Sexual differences in coloration in the 



spotted turtle, Clemmys guttata . Pp. 463-469. 



13 September 1921. 



59 2389 Gilmore, Charles W. The fauna of the Arundel 



Formation of Maryland. Pp. 581-594. 7 October 1921. 



Publ. 

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60 23 2418 Gilmore, Charles W. A new description of Saniwa 



ensidens Leidy, an extinct varanid lizard from 

 Wyoming. Pp. 1-28. 8 June 1922. 



60 26 2421 Cochran, Doris M. Description of a new species of 



agamid lizard from the Malay Peninsula. Pp. 1-3. 

 13 March 1922. 



61 3 2424 Gilmore, Charles W. The smallest known horned 



dinosaur, Brachyceratops . Pp. 1-4. 24 April 1922. 



62 5 2451 Gilmore, Charles W. A new fossil turtle, Kinosternon 



arizonense . from Arizona. Pp. 1-8. 6 February 1923. 



62 6 2452 Stejneger, Leonhard. Rehabilitation of a hitherto 



overlooked species of musk turtle of the southern 

 States. Pp. 1-3. 10 February 1923. 



63 3 2471 Chandler, Asa C. Three new trematodes from Amphiuma 



means . Pp. 1-7. 28 April 1923. 



65 11 2524 Dunn, E. R. Amastridium , a neglected genus of 

 snakes. Pp. 1-3. 1 April 1924. 



65 13 2526 Chapin, Edward A. Nematode parasites of the 



Brazilian land tortoise, Testudo denticulata . Results 

 of the Mulford Biological Exploration. -- 

 Helminthology . Pp. 1-6. 9 September 1924. 



66 6 2543 Cochran, Doris M. Notes on the herpetological 



collections made by Dr. W. L. Abbott on the island of 

 Haiti. Pp. 1-15. 25 October 1924. 



