FISHES OF THE FAMILY LORICARIIDA. 303 
Diameter of eye 124 times in the length of head; length of postorbital 
part of head 3 times in that of the produced part of snout . . 2. F. gracilis Rgn. 
6, Distance from supraoccipital to base of first dorsal ray 
534 times in the total length, Diameter of eye about 
16 times in the length of head. . . . . . . . . 38. F, oxyrhynchus Kner. 
B. Length of produced part of snout 83-34 times in the 
distance from its tip to the anus; distance from supra- 
occipital to first dorsal ray 5} times in the total length . 4. F. kneri Stdr, 
II. Abdomen without median series of plates, except 1 or 2 anteriorly. 
Length of produced part of snout 4-44 times in the distance from its 
fipecouthe emus enmed ve sekte estar ee |\i Re pit deed eee? Ont ares! Kener, 
Length of produced part of snout 3 times in the distance from its tip 
tothe anus . . PEL esl cil) ae Camis Ose amozonum)Gthr: 
Length of produced part of snout 24-24 times in the distance from its 
tip tOvEbeyangigie eh... cs atest <<) 1) el eal eon Gy ee dn Qeamtole Gthr, 
]. FARLOWELLA GLADIUS. 
Acestra gladius Bouleng. Trans. Zool. Soc. xiv. 1897, p. 425, pl. xl. fig. 2. 
Length of head 32 times in the total length, distance from supraoccipital to base 
of first dorsal ray 6 times. Breadth of head 4 times in its length, diameter of eye 
18 times, interorbital width 5 times. Length of produced portion of snout (measured 
on the ventral surface from the edge of the naked area containing the mouth) 3 times 
in the distance from its tip to the anus, and 23 times as long as the postorbital part of 
head. Sides of head without bristles. 33 scutes in a longitudinal series, 14+-19; 
7 between supraoccipital and dorsal ; abdomen with a median series of plates between 
the lateral series, Outer caudal rays strongly produced. All the fin-rays with dark 
spots; caudal with a longitudinal blackish stripe on its upper lobe. 
Total length 210 mm. ’ 
Two specimens: R, Jurua. 
2. FARLOWELLA GRACILIS, sp. n. (Plate XX. fig. 3.) 
Length of head 53 times in the total length, distance from supraoccipital to base ot frst 
dorsal ray 64 times. Breadth of head 4 times in its length, diameter of eye 124 times, 
interorbital width 52 times. Length of produced portion of snout 3 times in the 
distance from its tip to the anus and 32 times as long as the postorbital part of head. 
Sides of head with short bristles (?in males only). 33 scutes in a longitudinal series, 
15+18. In other characters similar to the preceding species, which it resembles in 
coloration. 
Total length 190 mm. 
One specimen: Rio Caqueta, Cauca Valley, 8. Colombia, collected by Dr. M, 
1). Eder. ee 
VOL. XvU.—ParT 111. No. 15.— October, 1904. 28 
