252 [October, 



very numerous and much developed along the middle of the back; the mark- 

 ings beneath are also different, halophila being largely maculated beneath. 



Engystoma olivacedm, Dob. 



There is a single specimen of Engystoma, one inch one line in length 

 by seven lines in breadth ; the anterior extremities 6 ; the posterior 1 inch 

 10 lines in length. The general color above is olive, with dark colored spots 

 posteriorly; these are observed in considerable number upon the poste- 

 rior part of the body and upper part of the thighs ; a few also are seen over the 

 shoulders ; the sides are obscurely marbled with brown ; under surface yellow, 

 immaculate; a well marked fold passes across the head behind the eyes, ex- 

 tending down alongside of the head. 



This specimen is larger than any of those in the collection of the Academy, 

 and the coloration is quite different from that of Dr. Holbrook's figure (N. Am. 

 Herpet. vol. v. pi. vi.,) and the specimens from Georgia in the collection pre- 

 sented by Maj. Le Conte. These are all more or less mottled with brown beneath 

 and brown or chestnut colored above. 



Dimensions. As above, length of tarsus and toes 9 lines ; of leg 4 lines ; of 

 thigh 4; of arm '2, of forearm 2. 



Gen. Remarks. Dumeril and Bibron describe five species of Engystoma two 

 from N. America, (carolinense and rugosum,) two from S. America, (ovale and 

 micropSj^and one from Malabar, (ornatum.) 



Habitat. According to Dr. Holbrook, Engystoma Carolinense has never been 

 found north of Charleston, its range extending westward to the lower Missis- 

 sippi. 



URODELA. 

 aMBYSTOMID^. 



Ambystoma luriddm, var. fasgiatum. 



There is but one specimen of Urodela, viz.,an Ambystoma. This is the same 

 animal apparently figured in Dumeril and Bibron's work, pi. 105, under the 

 name Ambystome abandes, (variete,) but it differs entirely from Ambystoma 

 fasciatum, (opacum,) not only in coloring but in the arrangement of the teeth; 

 these in fasciatum are placed in th-ee distinct groups, whereas in the present 

 specimen they are in a continuous series, forming a very obtuse angle, the 

 lateral prolongations passing behind the internal nares and terminating in a 

 line with their external margin, presenting the same arrangement as in Axa- 

 hjstoma, luridtrm., of which it is probably a variety, having nothing to distinguish 

 it from that species but the coloration. Dumeril and Bibron state that their 

 specimen was received from the neighborhood of New Orleans. 



One cannot but remark, in studying the collection of reptiles above noticed, 

 the great difference in the geographical range of the genera and species composing 

 it. The Emysdoes not exist with us, neither does a single one of the genera of 

 the lizards, unless it be Cnemidophorus. Of the innocuous serpents four are 

 common to Pennsylvania and Kansas, viz., Elaphis Alleghaniensis, Ablabes 

 triangulum, Tropidonotus ordinatus and Herpetodryas vernalis. The others, 

 viz., Tropidonotus parietalis, unless it be considered a climatal variety of si- 

 talis, Tropidonotus obliquus, Microps lineatus, Coryphodon flavivenlris, Coro- 

 nella doliata, Tantilla gracilis and lleterodon nasicus are unknown to us. The 

 genera of innocuous serpents in the collection common to Pennsylvania and Kan- 

 sas, are Elaphis, Ablabes, Tropidonotus, Coryphodon and Heterodon. Of the 

 venomous serpents, Trigonocephalus contortrix, which is one of the most widely 

 diffused of our serpents exists in both regions, but Crotalus confluentus is found 

 only in the far west and south-western portions of North America. Of the 

 Kanida?, R. halecina and pipiens are common to both, and of the Bufonida; B. 

 Americanus ; but we have no Engystoma, and among the Urodela no Ambys- 

 -oma, with an arrangement of teeth and system ef coloration in all respects 



