FISHES OF THE FAMILY LORICARIID®. 223 
2. Dorsal with I 10-13 rays, 
a. Supraoccipital entirely bordered posteriorly by a single scute. 
D. 110; length of base of dorsal equal to its distance from the 
ate Se AAS Bes ie Pon i ba oy 2aeAnundecimais Star: 
D. 111; length of base of Seal greater Rian its distance from 
thevcaudallity sneer cw MEP ahs st yu ce 38 oy seo. AD efentaculatis Spix. 
6. Supraoccipital bordered posteriorly by a median scute and by 1 on each side. 
a. Supraoccipital with strongly elevated median ridge. 
Interoperculum with a few very short spines. . . - - » « 4 A. gibbiceps Kner. 
Interoperculum with 12-15 spines, the longest 1} times he diameter 
Ot 
of eye 5. A. lituratus Kner. 
8. Supraoccipital with low median ridge. 
Interoperculum not notably spinate. . . . . . . . . . . 6. A.multiradiatus Hancock. 
Interoperculum with a few spines A. punctatus Gthr. 
B. Occipital without distinct median ridge ; snout broad, rounded ; scutes mostly strongly 
carinate. 
1. Depth of body 45 times in its length; interopereulum with 30 or more slender 
spines. 
Morsalewithwleanaysy a e-eeecne e-ilon at 2 enue a aed rarise Konan 
Iver MO Te 5 GG Gb 6 Bebb bon 6 9 o SE 4h ao ile. 
2. Depth of body more than 4} times in its length; interoperculum with less than 
30 spines; dorsal with I 7 rays. 
Interope-culum with a few short spines ; base of dorsal a little longer 
than its distance from adipose fin. . . . . . . . . . 10. A. aspidolepis Gthr. 
Interoperculum with about 20 spines; base of dorsal considerably 
longer than its distance from adipose fin ; 23-24 scutes in a 
longitudinal series . . abe SR o 6 6 6 5 5 6 UAE indies Nisin, 
Interoperculum with about 15 spines ; ieee of dorsal equal to its 
distance from adipose fin; 26-27 scutes in a longitudinal 
SELIGS | seer eee ea amr nee Were? Ue 4 0) piel ComAbneconenhynciismkencr 
C. None of the scutes carinate ; dorsal with I 7-8 rays. 
1. Supraoccipital with low median ridge. 
Length of mandibular ramus 2} times in the interorbital width ; 
large round dark spots on head, body, andfins . . . . 13. A. oligospilus Gthr. 
Length of mandibular ramus 24 times in the interorbital sat 
body and fins with a few broad dark bands . . . . . . . 14 A. vittatus Stdr. 
2. Supraoccipital without median ridge. 
a. Length of mandibular ramus less than interorbital width. 
Interorbital width 1} times in the length of head . . . . . . 15. A. bachi Bigr. 
VOL, XVIL.— Par? 11. No. 5.— October, 1904. 2H 
