.'j60 On new Loricariid Fishes from Brazil. 



Plecostomus paulinus. 



Deptli of body 5^ in the length, length of head 3.^. Depth 

 of head 1^ in its length, bieadtli of head nearly 1, length of 

 snout l;i^, diameter of eye G, intevorbital width 3. Length of 

 mandibular ramus Ir in tiie interorbital width. Barbel 

 nearly | the diameter of eye. Snout broad, obtuse ; supra- 

 orbital edges slightly raised ; supraoccipital witli slight 

 median elevation ; temporal plates not earinate. Scutes 

 spinulose, not earinate, 25 in a longitudinal series, 6 between 

 dorsal and adipose fin, 13 between anal and caudal. Supra- 

 occijjital entirely bordered posteriorly by a single scute. 

 Lower surface of liead and abdomen partly covered with 

 granular scales; a median naked area behind the mouth, and 

 a large naked area at the base of each ventral, extending 

 forwards and confluent anteriorly with that of the other side. 

 Dorsal I 7, the first ray | the lengtli of head, when laid back 

 extending slightly beyond the base of the last, wliich is g as 

 long ; length of base of dorsal equal to its distanca from 

 posterior part of spine of adipose fin. Anal I 4. Pectoral 

 spine extending to anterior ;?^ of ventral. Caudal sh'ghtly and 

 obliquely emarginate. Caudal peduncle 3 times as long as 

 deep. Uniformly olivaceous, fins dusky. 



A single sj)ecimen, 160 mm. in total length, from the Rio 

 riraeicalia, 8ao Paulo, Brazil. 



Allied to 1\ laiirostris. Reuan. 



Plecostomus Ilermanni. 



Depth of body about 5 in the length, length of head 31. 

 Depth of head ]§ in its length, breadth of head nearly 1, 

 length of snout If, diameter of eye about 6, interorbital 

 width 2§. Length of mandibular ramus 1| in the inter- 

 orbital width. Barbel nearly equal to the diameter of eye. 

 Snout moderately narrowed anteriorly ; supraorbital edges 

 not raised ; supraoccipital nearly flat ; temporal plates not 

 earinate. Scutes spinulose, not earinate, 2G in a longitudinal 

 series, G between dorsal and adipose fin, 13 between anal and 

 caudal. Supraoccipital eiitirely bordered posteriorly by a 

 single scute. Lower surface of head and abdomen in great 

 pait covered with small granular scales, with a naked area at 

 the base of each ventral. Dorsal 1 7, the first ray nearly 

 equal to the length of head, when laid back extending a 

 little beyond the base of the last, which is ■§• as long; length 

 of base of dorsal equal to its distance from the tip of spine ui 

 adij)ose fin. Anal I L Pectoial spine bristly, extending to 



