On Three new Species of Siluroid Fishes. 165 



XIX. — Descriptions of Three new Species of Siluroid Fishes 

 from Southern Brazil. By G. A. BOULENGER, F.R.S. 



The fishes here described were collected in the Province Sao 

 Paulo by Mr. H. K. Heyland, and presented by him to the 

 British Museum. 



Plecostomus Heylandi. 



Head longer than broad, 3f times in total length, simply 

 convex, without keels ; snout rounded, naked at the end ; 

 diameter of eye 9 times in length of head, '6\ times in inter- 

 orbital width ; barbel extremely short, about \ diameter of 

 eye ; series of teeth in both jaws forming a doubly curved 

 series interrupted in the middle, about 70 teeth in each series ; 

 lower lip much developed, covered with strong flat papillae, 

 with slightly fringed border ; interopercular spines none. 

 Lower surfaces, from the mouth to the anal fin, perfectly 

 naked. Dorsal I 7 j first ray scarcely longer than snout, or 

 than the distance from its extremity to the adipose fin. 

 Pectoral spine half length of head, merely rugose. Ventrals I 5, 

 the first ray much thickened. Anal 1 4. Caudal squarely 

 truncate. Depth of caudal peduncle 3 times in distance 

 between anal and caudal fins. No posthumeral keel. Scutes 

 on body rough and spinulose, but not keeled ; lat. 1. 28 ; 

 13 scutes between anal and caudal fins. Olive-brown above, 

 without spots ; dorsal, pectoral, ventral, and anal fins spotted 

 with black. 



Total length 150 millim. 



A single specimen from a mountain stream 400 feet above 

 sea-level near Santos. 



Loricaria latirostris. 



Teeth small, well developed, 14 or 16 in each jaw. Head 

 much depressed, 1^ as long as broad, nearly 4 times in total 

 length ; snout rounded, feebly projecting beyond the lip, 

 measuring half the length of the head ; head-shields very 

 rough with spinose tubercles ; three very obtuse ridges on 

 the snout ; long, close-set, hair-like bristles on the sides of 

 the head, from the end of the snout to the gill-cleft ; diameter 

 of eye 10 times in length of head, 2^ in interorbital width ; a 

 strong postorbital notch ; lower labial lobe large, strongly 

 papillose, strongly fringed. Dorsal I 7 ; first ray | length of 

 head, just above middle ventral rays. Pectoral I 6, | length 

 of head, rough with small spines. Ventral I 5, as long as 



