NATURAL SCIENCES OF PHILADELPHIA. 127 



Stenorhina ventralis Dum. & Bibr. Cope, Proc. A. N. S. Philad., I860, 



242. 

 Ninia collar is, Jan. Elenco, 35. Cope, Proc. A. N. S. Philad., 1883, 100. 



Masticophis bilineatus m. Herpetodryas bilincatus Schlegel, Jan. Elenco, 

 Syst. 81. 

 Two specimens. Masticophis is the first name published with description 

 for this genus, which I characterized (Proc Acad. 1861, 560) under the name 

 Drymobius Fitz. It embraces all the Herpetodryades of authors, (vide Jan's 

 Elenco,) except the H. carinatus, H. sebastus m., and H. flaves- 

 cens m. (Phyllosira m.) No. 777. 



Thrasops mexicanus Cope, Proc. A. N. S. Philad., 1861, 557. Leptophis 

 D. & B. Ahaetulla Gthr. 

 Two specimens. No. 771. 



Leptodira annulata var. 



Much like the South American variety in characters, but slender, with very 

 narrow neck and broad head, like Himantodes. The head is broader, and the 

 neck more constricted than in annulata; scales narrower, in twenty-one 

 rows; prefrontals broader than long, loreal square; one preocular little 

 apparent on upper surface of head, two postoculars ; eight upper labials ; eye 

 over fourth and fifth ; third sometimes in contact. Grastrostega 184, anal 

 divided; urostega 81. 



Grey, with twenty-two jet black half rings, extending to gastrosteges, the 

 anterior broader, posterior pointed in front. Below immaculate. A black 

 band from eye crosses angle of mouth and unites with first nuchal half ring. 

 Total length 18 in. 2 1.; of tail, 4 in. 4 1., which is as broad as from end of 

 muzzle to its border. 



Tropidodipsas brevifacies, p. nov. 



This species approximates nearly the form of Leptognathus in its prege- 

 neials broad as long, and postgeneials broader than long, and in the 'lack of 

 complete preocular. It differs from the two known species of its genus in 

 having smooth scales. An upper preocular, on one side exceedingly minute, 

 neither attaining the frontals ; a loreal extensively margining orbit, on one 

 side divided by a horizontal suture. Postoculars three, inferior in contact 

 with fifth and sixth labials, superior with occipital only. Superior labials 

 nine, three posterior longer than high ; inferior eleven, fifth and sixtli minute 

 and bordered by two hexagonal shields within ; (one side mutilated.) Inter- 

 nasals and prefrontals broader than long, frontal broad as long, lateral longer 

 than posterior suture ; temporals 2 3 4. Gastrostega 171, five single gulars, 

 one entire anal, urostega 86 pairs. Tail 3| times in total length. 



Glossy black, with ten on the body and seven on the tail yellow annuli, 

 which occupy four scales and five gastrostega. A broad yellow collar reaching 

 to the occipitals and involving two posterior labials, and four gular shields. 



The teeth in this species are short and weak, and the maxillary bones 

 slender and not alate. Coll. No. 753. One specimen. 



Elaps ornatissimus Jan, Elenco. 



Smilisca baudinii m. Hylavanvleitii Bd. Hyla baudinii Dum., Bibr. viii. 

 Apparently abundant. 



Triprion petasatus Cope. Pharynyodon petasatus m. Proc. Acad. 1865, 

 193. Generic name preoccupied in Helminthes. 



Bufo valliceps Wiegmann, Peters. B. nebulifer Girard. 



Bufo m a r i n u 8. B. agua Daudin. 



Rana h a 1 e c i n a Bosc. One sp. , No. 712. 



1866.1 



