NATURAL SCIENCES OF PHILADELPHIA. 151 



torals and ventrals are nearly equal and almost as long as the head. The 

 ventrals are inserted nearly as far back as the vertical of the third dorsal spine. 

 The entire caudal equals the length of the head ; the median rays equal about 

 two-thirds of the longest. 



D. XIII. 12. A. II. 13. 

 4 3 



Scales 25, -. L. 1. 20. 

 10 3 



The color is light green or purplish ; five rather narrow vertical bands cross 

 the body ; the first commences under or close before the front of the dorsal ; 

 the second, under the space between the third and fifth spine ; the third, between 

 the seventh and ninth; the fourth, under the thirteenth spine, and the fifth is 

 close behind the dorsal and anal. The fins are immaculate, the external por- 

 tions of the ventrals darker. 



This species is apparently very common at Cape St. Lucas, Mr. Xantus having 

 sent to the Smithsonian Institution about one hundred specimens, most of which 

 are, however, very young ; the largest are three or four inches long. 



I dedicate the species to Dr. Troschel, who, by his annual reports on herpe- 

 tology, ichthyology and malacology, as well as by the original memoirs pub- 

 lished by him alone and in conjunction with the great J. Muller, has much 

 contributed to the advancement of those departments of science. 



On some new and little known American ANURA 



BY E. D. COPE. 

 Hylodes dimidiatus. 



Form ranine. Head not broader than body, muzzle rather acute, depressed 

 at the tip. Nostrils lateral. Eye of moderate size, twice the extent of the 

 round tympanic membrane. Internal nares small, less than ostia pharyngea; 

 vomerine teeth posterior to them, in two rather abruptly curved series ; their 

 inner extremities directed backwards, widely separated, their outer reaching 

 the maxillary margin. Tongue oval, without posterior notch. Skin smooth 

 above and below, except upon the posterior femoral region. A narrow dermal fold 

 from the superciliary region nearly to the groin. Posterior lateral region rugulose. 

 Digital pallettes well developed : no rudimentary membrane between posterior 

 digits. Two metatarsal tubercles, that at the base of the least digit elongate ; 

 sole smooth. Palm tuberculous, two metacarpal warts, no tarsal dermal fold. 

 Humerus three-fourths the length of tarsus, which is half as long as the tibia, 

 which is longer than the femur. Length of head and body 1 in. 9 1. Ante- 

 brachium 4 1. Tarsus and longest digit 1 in. 3 1. Hinder extremity, from 

 groin, 2 in. 9 1. 



Above brownish or pinkish gray, beneath yellowish. A black band passes 

 from the end of the muzzle across the tympanic disc, beneath the lateral dermal 

 fold, to about the middle of the side. A yellowish line on superior labial 

 margin, indistinct anteriorly. A black, white-bordered spot on the crural 

 region, sometimes one on each side of the end of the coccyx. Inner faces of 

 extremities marbled ; superior surfaces cross-banded. A very narrow white 

 line extends from the end of the muzzle to the termical coccygeal region. 

 Some white spots on the posterior femoral surface. 



Habitat. Eastern Cuba. Mus. Smithsonian (No. 5099) Mr. Wright Coll. 

 Mus. Acad. Philada. 



This species exhibits much resemblance to Dr. Giinther's Cystignathus 

 albilabris in external form. 



Hylodes 1 e n t u s . 

 Form stout, depressed ; posterior extremities short. Head not so wide as 



1861.] 



