216 MR. C. TATE REGAN ON THE 
Depth of body 5} times in the total length, length of head 3 times. Depth of head 
twice in its length, breadth of head 1} times, length of snout 1} times, diameter of eye 
7 times, interorbital width 2? times. Length of mandibular ramus 2} times in the 
interorbital width. Snout broad, rounded; supraorbital edges not raised; supra- 
occipital with low median elevation ; temporal plates not carinate. Scutes spinulose, 
not carinate, 26 in a longitudinal series, 7 between dorsal and adipose fin, 13 between 
anal and caudal. Supraoccipital entirely bordered posteriorly by a single scute. 
Lower surface almost completely naked. D.I 7, the first ray equal to $ the length 
of head, the last } as long; length of base of dorsal equal to its distance from the 
tip of the spine of the adipose fin. A.14. Pectoral spine extending a little beyond 
the base of ventral. Caudal moderately emarginate. Caudal peduncle 23 times as 
long as deep. Dark spots on head, body, and fins. 
Total length 130 mm. 
One specimen: Bahia. 
19. PLEcostoMUS WUCHERERI. (Plate X. fig. 2.) 
Plecostomus wuchereri Giinth. Cat. Fish. v. p. 235 (1864). 
Plecostomus brevicauda Giinth. |. ec. 
Plecostomus lima Liitk. Overs. Dan. Selsk. 1873, no. 3, p. 70, and Vid. Selsk. (5) xii. 1875, 
p. 140. 
Plecostomus vermicularis Eigenm. Proc. Cal. Ac. (2) i. 1888, p. 170, and Occ. Pap. Cal. Ac. i. 
1890, p. 411. 
Depth of body 6-6} times in the total length, length of head 3-3} times. Head as 
broad as long or a little longer than broad and 1{~2 times as long as deep. Diameter 
of eye 6-8 times in the length of head, interorbital width 23-24 times, length of snout 
13 times. Length of mandibular ramus twice in the interorbital width. Snout broad, 
rounded; supraorbital edges not, or scarcely, raised; supraoccipital with low median 
elevation ; temporal plates not carinate. Scutes spinulose, not carinate, 26 in a 
longitudinal series, 6-7 between dorsal and adipose fin, 12-13 between anal and caudal. 
Supraoccipital bordered posteriorly by 1, 2, or 5 scutes. Lower surface of head and 
abdomen, in the adult, in great part covered by small granular scales; a large naked 
area at the base of each ventral, which may extend forward to the level of the base of 
the pectoral, or may be confluent posteriorly with that of the other side. D.17, the 
first ray as long as the head, the last }-j as long; length of base of dorsal equal to its 
distance from the middle or posterior part of the spine of adipose fin. A. I 4. 
Pectoral spine extending beyond base of ventral. Caudal slightly and obliquely 
emarginate. Caudal peduncle about 3 times as long as deep. Dark spots on head, 
body, and fins, those of the dorsal in 1, 2, or 3 series on each interradial membrane, 
sometimes confluent to form undulating cross-bars. 
Total length 250 mm. 
