T 56 NATURALISTS' ASSISTANT. 



Gray, J. E. Reptilia in Beechey's Voyage. 4to. London, 

 1839. 



Gray, J. E. Catalogue of Tortoises, Crocodiles and Amphis- 

 baenians in the British Museum. 12mo. London, 1844. 



Gray, J. E. Catalogue of Lizards in British Museum. 12mo. 

 London, 1845. 



Gray, J. E. Catalogue of Snakes in British Museum. Lon- 

 don, 1849. 



Gray, J. E. Catalogue of Batrachia Gradentia in British 

 Museum. 12mo. London, 1850. 



Gray, J. E. Descriptive "Catalogue of Tortoises in the British 

 Museum. 2 vols. and Suppl. 4to, 50 pis. London, 1855-70. 



Gray, J. E. Synopsis of the recent Crocodilians. 4to. Lon- 

 don, 1867. 



Gray, J. E. Hand list of Shield Reptiles in British Museum. 

 8vo. London, 1873. 



Gray and Sowerby. Monograph of the Testudinata. 4to, 60 

 pis. London, 1872. 



Guichenot. Reptilia in 1'Exploration scientiflque de 1'Algerie. 

 4to. Paris, 1850. (Fr.) 



Guichenot. New or Rare Reptiles from South America (in 

 Castelnau's Expedition). 4to. Paris, 1855. 



Gunther, A. Catalogue of the Batrachia Salentia in 

 the British Museum. 8vo. London, 1858. 



Gunther, A. Catalogue of the Colubrine Snakes in the Brit- 

 ish Museum. 12mo. London, 1858. 



Gunther, A. Reptiles of British India. (Ray Society.) fol., 

 26 pis. London, 1864. 



Hallowell, E. Reptiles of the Zuni and Colorado Rivers (in 

 Sitgreaves' Report). Washington, 1853. 



Hallowell, E. New Reptiles from Oregon and West Africa. 

 (Jour. Phila. Acad.) 1854. 4to. 



