2H4 Mr. G. A. Boulenger on new 



Vallentinia fidklandicaj sp. n. 



Umbrella belUsliaped, about one and half times as high as 

 broad. 



Stomach short, about one third the lengtli of the unibrelUi- 

 cavity, not situated on a peduncle. 



Moutii with lips (four?). 



Gonads situated on the radial can-vis in the up|)'^r half of 

 the umbrella-cavitj, a little way below the stomach ; oval 

 and sac-like. 



Tentacles, four solid perradial with terminal suckers and 

 twenty-four hollow tentacles (six in each quadrant, evenly 

 distributed) with bands of neniatocysts. 



Sense-organs, sixteen vesicles enclosed inside the margin 

 of the umbrt-lla, each with a single otolith. 



Size: 3 millim. in height and 2 millim. in widtli. 



The collection contains only a single specimen. 



This species probably lives amongst the kelp. 



Universitv Cullege, London, 

 13tli February, 1902. 



XLV 1 1 . — Descriptions of new Fishes and ReptiUs discovered h if 

 Dr. F. Silvestri in South America. By G. A. BouLENGER, 

 F.li.S. 



The new species here described are from a large collection 

 formed by Dr. F. Silvestri in 1900 in Brazil, Paraguay, and 

 Argentina, entrusted to me for study by the Director of the 

 Genoa Civic Museum. Duplicates have been kept for the 

 British Museum. 



Fishes. 

 Leporinus Sihestrii. 



Depth of body 3^ to 3^ times in total length, length of 

 head 4 to 4.\ times. Eye perfectly lateral, visil)le from above 

 and from below, in the middle of the length of the head, its 

 diameter 4 times in the kngth of the head, 2 to 2/5 in the 

 interocular width ; width of the mouth half that of the head; 

 lips feebly fringed; teeth white. Dorsal II 10, a little nearer 

 the root of the caudal than the end of the snout, its border 

 convex, its longest ray | the lenjjth of the head. Anal III 8. 

 Pictoral ? the length of the head, terminating at a great 

 distance from the ventral, which is a little longer*. Caudal 

 • The ventral fins are ontirijly absent in one of the specimens. 



