70 Fretp Museum or Natura History — Zo6toey, Vor. X. 
Description from specimens 120 to 140 mm. in length, Virginia 
River. Eggs small, one female contained about 7,000 eggs. 
Cheirodon eigenmanni sp. nov. 
Type No. 7583, F. M. N. H.; length 67 mm.; La Junta, Costa Rica. 
Head 4.2 to 4.4; depth 2.5 to 2.6; D. 1,9; anal 2, 29 to 31; scales 46 to 
48; 17 or 18 between dorsal and ventrals. 
Body elongate, much compressed; profile evenly convex; top of 
head convex; fontanelle large; margin of upper lip slightly above level 
of middle of eye; mouth rather large; jaws subequal; maxillary to first 
third of eye, its length 2.3 to 2.4 in head; diameter of eye 2.6 to 2.9; 
snout 3.5 to 3.7; entire edge of maxillary toothed, 2-2 anterior ones 
denticulate, the remaining 6—6 canine; premaxillary teeth 5—5, denticu- 
late, in one series; teeth of lower jaw denticulate, in one series of 
6-6, these followed by 2-2 canine teeth; gill rakers 6+ 8; dorsal fin high 
its longest rays about 2.8 in body; base of anal 2.5 to 2.7; pectorals 4.3 
to 4.7; ventrals 4.3 to 4.5, their tips reaching past origin of anal; caudal 
peduncle 2.1 to 2.2 in head, lateral line present on about 10 scales. 
Color silvery, a black spot about half as large as eye mostly above 
and near termination of lateral line; lateral band very narrow anteriorly, 
becoming darker and broader and ending in an elongated black caudal 
spot which extends to end of middle caudal rays. 
Named for Dr. C. H. Eigenmann, who has done more than any one 
else to increase our knowledge of the Characins, the most interesting 
family of fishes in the fresh waters of the Americas. 
Gambusia umbratilis sp. nov. 
Type No. 7584, F. M. N. H.; length 51 mm.; Guapilis, Costa Rica. 
Head 4.1 to 4.5; depth 3.6 to 3.7; D. 1.7; A. 2.6; scales 7-28. 
Body elongate, profile slightly convex, mouth small, the lower jaw 
the longer; outer series of teeth the larger; snout short, 4.2 to 4.7in head; 
eye 2.5 to 2.8; gill rakers 15; pectoral 1.2 to 1.3; origin of dorsal slightly 
in advance of anal, midway between base of caudal and eye. Anterior 
anal rays the longest, 1 2 to 1.3 in head; caudal peduncle 1.4 to 1.6 in 
head. 
This description from females 40 to 58 mm., two males 46 mm. have 
head 4.0; depth 3.7; eye 2.4 in head, snout 3.8; caudal peduncle 1.4; 
modified anal reaching slightly more than half way to base of caudal, 
.73 in head. 
Color dark olivaceous, 6 to 10 dark bars on posterior part of the 
body much narrower than the interspaces; dorsal fin with a broad black 
bar near base and a second one at tip. 
