FISHES OF THE FAMILY LORICARIIDA. Zi 
Twelve specimens (including co-types of P. lima and P. vermicularis): Bahia; 
Rio San Francisco. 
20. PLECOSTOMUS LUETKENI. 
Plecostomus lima (non Liitken) Steind. Sitzb. Ak. Wien, lxxiv. 1876, p. 679. 
Plecostomus luetkeni Steind. ib, 1xxvi. 1877, p: 217. 
Depth of body nearly 7 times in the total length, length of head 33 times. Depth 
of head twice in its length, breadth of head 1% times, length of snout 1} times, 
diameter of eye 8 times, interorbital width 3 times. Length of mandibular ramus 
1} times in the interorbital width. Snout broad: supraorbital edges not raised ; 
supraoccipital flat; temporal plates not carinate. Scutes spinulose, not carinate, 27 in 
a longitudinal series, 7 between dorsal and adipose fin, 13 between anal and caudal. 
Supraoccipital bordered posteriorly by a median scute and one on each side, Lower 
surface of head and abdomen almost completely naked. D. 1 7, the first ray a little 
longer than the head, the last 2 as long; length of base of dorsal equal to its distance 
from the tip of the spine of “the adipose fin. A.I4. Pectoral spine extending a 
little beyond base of ventral. Caudal slightly emarginate. Caudal peduncle 3 times 
as long as deep. Large dark spots on the head and on the dorsal. 
Total length 300 mm. 
One specimen: S.E. Brazil. 
21. PLECOSTOMUS AUROGUTTATUS. 
Hypostomus auroguttatus Kner, Denkschr. Ak. Wien, vii. 1854, p. 269, pl. ii. fig. 3. 
Hypostomus asperatus Casteln. Anim. Am. Sud, p. 41, pl. xx. fig. 2 (1855). 
Plecostomus auroguttatus Giinth. Cat. Fish. v. p. 234 (1864) ; Steind. Denkschr. Ak. Wien, xliy. 
1881, p. 6. 
Plecostomus johnii Steind, Sitzb. Ak. Wien, lxxiv. 1876, pt. 1, p. 691; Eigenm. & Eigenm. Proce. 
Cal. Ac. (2) 1. 1888, p. 170, and Occ. Pap. Cal. Ac. i. p. 413 (1890). 
Depth of body about 6% times in the total length, length of head 3-31 times. 
Depth of head nearly twice in its length, breadth of head 1,)5 times, length of snout 
13-1} times, diameter of eye 6-8 times, interorbital width 2}-23 times. Length of 
Se halar ramus 13 times in the interorbital width. Snout broad, rounded; supra- 
orbital edges slightly raised; supraoccipital with low median elevation; temporal 
plates not carinate. Scutes spinulose, not carinate, 25-26 in a longitudinal series, 
6-8 between dorsal and adipose fin, 12-14 between anal and caudal. Supraoccipital 
entirely bordered posteriorly by a single scute. Lower surface of head and abdomen 
almost completely covered with small granular scales; naked areas behind the mouth 
and at the base of each ventral. D.17, the first ray equal to 3 the length of head, 
the last 3 as long; length of base of dorsal a little greater than its distance from the 
adipose fin. A. I 4. Pectoral spine, in the adult, extending nearly to middle of 
2a2 
