1:^7X] ^^«J [Cope. 



generic differences in the carapace, the abdomino-femoral dermal suture 

 crosses at the posterior third of the hyposternal bones, instead of at their 

 middle, as in the Adocus syntheticus. 



This species, like the last, was found in the upper bed of the Cretaceous 

 green sand, at the works of the Pemberton Marl Company, New Jersey, 

 by Judson C. Gaskill, the director. The name of this gentleman fre- 

 quently occurs in my contributions to the paleontology of the Cretaceous, 

 and I take the present opportunity of expressing my indebtedness for the 

 constant liberality with which he has aided in the advance of the science. 

 Without his attention to and enlightened interest in the subject, many 

 interesting points in the history of the life' of the Cretaceous periods 

 would not have come to light. Those desirous of seeing one of the fine 

 sections of the middle marl bed to be found in the state, will be repaid by 

 a visit to the opening made under the direction of Mr. Gaskill. 



EIGHTH CONTRIBUTION TO THE HERPETOLOGY OF 

 TROPICAL AMERICA. 



Bead before the A. P. S., September 16, 1870. 



By E. D. Cope. 



The materials w^hose examination has furnished the following addi- 

 tions to zoological science, consist of four collections. These are, tirst: 

 one from Pebas, Equador, on the Amazon, from John Hauxwell; second, 

 tlmt made by Prof. Agassiz, of the Thayer Expedition to Brazil; third, a 

 collection from Turk's Island, West Indies, obtained from Prof. Adrian J. 

 Ebell; and fourthly, a small collection made by Dr. R. E. van Rijgersma 

 at St. Eustatia. 



The first collection furnished the following species in addition to those 

 already determined by me from the same locality, in two papers, viz: in 

 Proceedings Ac. Nat. Sciences 1868, 96, and do. of the American Philo- 

 sophical Society 1869, 156. 



OPHIDIA. 



Erythrolamprus ajsculapii. 



Lygophis nicagus. Cope, Proc. Ac. Nat. Sci. Phil. 1868, p. 132. 



Oxyrhopus petolarius, var. G. (GCinther) 



Oxyrhopus plumbeus. L. 



Xenodon angustirostris? Peters. 



Hydrops callostictus, Giinth., Ann. Mag. N. H. tab. 



Helicops chrysostictus. Cope, {Tachynectes) Pr. A. N. S. Phil. 1862, 71. 



Thrasops ahaetulla. L. 



Rhinobothryum lentiginosum Scopoli. 



LACERTILIA. 



Anolis nasicus. 

 Polychrus marmoratus. 

 Doryphorus castor. Cope, sp. nov. 

 Hyperanodon ochrocoUaris Spix. 

 A. p. S. — VOL. XI— 42e 



