NATURAL SCIENCES OP PHILADELPHIA. 135 



with unmevous large brown spots. Length to base of caudal fin 

 (marginal) m. .12 ; to base of dorsal, .Ot. 



From Nauta. 



One of the specimens from Nauta measures twenty-five inches. 



Corydoras ambiacus, Cope, Proceed. Acad. Phila., 1872, p. 280. 

 From Nauta. 



Corydoras armatus, Calichthys armahis. Glinth. Proceed. Zool. Soc. Lend., 1868, 

 p. 231. 



Oallichthys asper, Quoy. Gaim. 



Nauta. 

 Hoplosternum longifilis, Cuv. Val., Glinther, v. p. 228. 



Nauta. 



Hypoptoporna bilobatum, Cope, Proceed. Amer. Philoso. Soc, 187. 

 Loricaria cataphracta, L. Glinther, v. p. 255. 

 From the Marafion. 



Loricaria rostrata, Spi.\-, Glinther, v. 256. 

 Liposarcus jeanesianus, sp. nov. 



This large and handsome species is allied to the L. pardalis^ 

 Cast, and L. varius, Cope, but presents a number of peculiar fea- 

 tures. It is elongate and depressed, the head moderately so only. 

 The head enters the total length (with caudal) 5.75 times ; while 

 the greatest depth (in front of the dorsal fin) enters it eight times, 

 the head being measured to the superior end of the branchial fis- 

 sure. There is an obtuse canthus rostralis from the orbit to the 

 nares, there is a strong nuchal angle (not a crest), and a low one 

 corresponding to the outer border of the epiotic bone. The two 

 nuchal scuta have two very low ridges each. The orbit is small, 

 entering the length of the snout 6.5 times, and the interorbital 

 width 3.25 times. The sculpture of the upper surfaces of the head 

 consists of numerous close grooves forming various patterns. 

 Two or three small spines on the intei'operculum. Beard reach- 

 ing the line of the front margin of the e^'C. Inferior surfaces to 

 anal fin entirely granular. Scuta of the body in twenty-eight 

 transverse and (at the dorsal fin) four longitudinal series. They 

 have a low serrate keel wh'ich ends in a point. Six scuta between 

 dorsal fins and fourteen between anal caudal. Radii D. II. 12; 

 C. I. 14, I; A. I. 4 ; Y. I. 5 ; P. I. 6. Base of the dorsal enters 

 total length 3.5 times, and equals the length of the head and nape 



