86 Fretp Museum or Naturat History — Zoétocy, Vor. X. 
Family P@CILIIDA. 
. 
Rivulus brunneus sp. nov. 
Type No. 7593, F. M. N. H.; length 41 mm.; Toro Point, Canal 
Zone, Panama. 
Head 3.4 to 3.6; depth 4.7 to 4.8; D. 8 or 9; A. 12 to 14; scales 38 to 
40. 
Body robust; head rather broader than deep; diameter of eye 3.2 
to 3.4 in head; origin of dorsal over posterior third of anal; last ray 
of anal about opposite sixth ray of dorsal; origin of dorsal to base of 
caudal 2.5 in its distance from eye, about midway between tip of caudal 
and anterior margin of opercle; pectoral 1.4 to 1.5 in head, their tips 
not reaching ventrals. 
Color brownish, sides slightly speckled with darker; tip of anal rays 
black; a black stripe from under side of caudal peduncle to end of lower 
caudal rays, in some specimens the upper caudal rays with a similar 
bar, these not prominent in the smaller specimens; caudal and dorsal 
with few faint spots. In life the upper parts of the body grayish with 
shades of pink; belly pale with shades of pink, fins all reddish; base 
of caudal and anal deep red. 
Atlantic slope of central Panama. 
Gambusia cascajalensis sp. nov. 
Type No. 7594, F. M. N. H.; length 55 mm.; Rio Cascajal, Porto 
Bello, Panama. 
Head 3.7 to 3.8; depth 3.7 to 3.8; D. I, 6; A. II, 7; scales 8-26. 
Body elongate, compressed; the dorsal region slightly elevated; 
mouth small, the gape extending about % distance to eye; lower jaw 
the longer; the teeth in both jaws in several series, the outer slightly 
enlarged; snout 3.1 to 3.2 in head; eye 2.9 to 3.1; origin of dorsal over 
last anal rays, its distance from base of caudal 1.9 to 2.1 in its distance 
from tip of snout, about midway between tip of caudal fin and eye; 
anal falciform, its anterior rays the longer, their length about 1.2 in 
head, their tips reaching beyond tips of last rays when the fin is deflexed; 
ventrals reaching nearly to anal; caudal fin rounded; gill-rakers 12; 
caudal peduncle 1.8 in head, 13 scales before dorsal fin. 
Color olivaceous; base of anal and anterior rays black, tip of dorsal 
rays black; a broad dark curved bar at base of caudal rays, rather in- 
distinct in some specimens. 
Rio Cascajal, Atlantic slope of Panama. 
