bo 
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Lo 
MR. C. TATE REGAN ON THE 
4 times in the length of head; median abdominal plates 
extending anteriorly to level of middle of gill-opening . . 8. L. magdalene Stdr. 
Breadth of body at level of first anal ray 43 times in the distance 
from that point to the caudal; first dorsal ray as long 
as the head; interorbital width 4% times in the length 
of head; median abdominal plates extending ius to 
posterior edge of coracoid . . . . . 9. L. cadee Hensl. 
Breadth of body at level of first anal ray eae 6 times in ‘the 
distance from that point to the caudal; first dorsal ray 1} 
times the length ofhead . ........ . . «10. ZL. teffeana Stdr. 
B. Scutes in front of dorsal all distinctly carinate. 
Breadth of head 12-14 times in its length; abdominal plates in 3 
or 4 series between the posterior plates of the lateral series, 
in 5 or 6 between the middle ones, still more numerous 
anteriorly . . . - sas ; . . ll. L. catamarcensis Berg. 
Breadth of head 1? times in its ers abdominal plates in 3 series 
between the lateral series for nearly their whole extent ; first 
dorsal ray longer than the head, the length of which is 4} 
times in the total Jength (in a specimen of 108 mm.) . . . 12. L. konopickyi Stdr. 
Breadth of head 13 times in its length ; abdominal plates in 3 
series between the lateral series for nearly their whole extent; 
first dorsal ray shorter than the head, the length of which is 
42-43 times in the total length (in specimens of 190 mm.) . 13, L. steindachneri Rgn. 
Breadth of head 13-1} times in its length; abdominal plates in 
3 series between the last 4 of the lateral series, anteriorly 
morenumerous . . .. ++. «© ++ 2 « « « « « 1& £, lima Kner. 
d. Abdominal plates in 5 or 6 series between the posterior plates of the lateral series, 
anteriorly more numerous ; 29 scutes in a longitudinal series (? upper caudal ray 
elongate). 
Breadth of head 13 times in its length ; anal plate bordered ante- 
riorly by 3; pectoral spine extending to base of ventral . . 15, L. strigilata Hensl. 
Breadth of head 14 times in its length; anal plate bordered ante- 
riorly by 5; pectoral spine extending to anterior } of ventral. 16. L. microlepidogaster Regn. 
B. Abdomen naked anteriorly, covered by a group of 
rather large plates in its posterior half . . . . . 17. L. latirosiris Blgr. 
II. Upper lip narrow, with marginal fringes for its whole extent; lower lip broad or moderately 
so, in great part covered with very small papillz, posteriorly smooth, the margin entire 
or slightly fringed ; barbel not longer than diameter of eye; teeth in equal number in 
both upper and lower jaw, 10-12 on each side; a more or less distinct enlarged anal 
plate ; head without keels or ridges. (Pseudoloricaria Blkr.) 
34-35 scutes in a longitudinal series; anal plate bordered ante- 
riorly by several . . . . cet » « « « » 1S. Z. leviuscula C. & VY, 
30 scutes in a longitudinal series ; BAS plate ee otesions 
bya gues =< ge} ot 8 ie on 5. | pep ttmmernrieMiCn ry anes 
