172 MEMOIRS OF THE CARNEGIE MUSEUM. 
(4) EHigenmannia troscheli (Kaup). 
Snout short; minute teeth in patches in both Jaws; size small, not exceeding 
250 mm. 
The stomach of but a single specimen 180 mm. long was examined. It came 
from San Joaquim and contained twenty-nine Copepoda, seventeen Cladocera, 
three dipterous larvee and one Hydrachnid. This food is of the same type as that 
taken from the two preceeding species of this genus. 
(5) Hypopomus brevirostris (Steindachner) and (6) Hypopomus artedi (Kaup). 
These two species are so similar that they will be considered together. Snout 
short, somewhat pointed; teeth wanting; mouth small; caudal appendage moderate 
to long; size small. 
Hypopomus artedi (Kaup). 
Locality. | Length. | Entomostraca. Insect Larvee. | Annelida, Vegetable Debris. 
Mama Stop-Oll terete eee | 170 ee asters Cte | 2 | “a 
RTO; AUT ater tocar ee aera 145 4 25 1 | = 
Wrnsdaysand eee eee TAQ! yer I erketieneess enteral 18 | 
SEMEN oda ogepcaqouesoc ale tie an teeters tome cla ae | 14 | 3 
Caceres! oinc chase hse acostatun: 20". 1) eae enaeerrrentagne 23 [elastiaRereus sesccrersye | 
_ aio pavenosddsocs sogoobomocmacsen| of ps0) 6 7 
Hypopomus brevirostris Steindachner. 
Locality. Length. Entomostraca. | Insect Larvee. Annelida, Vegetable Debris. 
oleae Fee Se lt : | = Sia Loe ae 
Chipoo Creekae name. seer 165 14 | 10 
@ampo.Grande.. ss. aeeeeee 140 17 | 
Nickaparoome-nemncarieceeec | 118 9 12 4 = 
Ttartuba;. ...e0 roc. heer 100" | Miescceeaenteree cr 14 G 
BoalVienturdiarccn = cemrecee ‘| 75 20 
Motalls, otsteinen ose Nou oon sox 600 86 1 
(7) Steatogenys elegans (Steindachner). 
Head chubby; snout short and blunt; mouth small; a cylindrical filament in a 
groove on each side of the mental region; size small. 
This species was of particular interest because of the peculiar mental filaments. 
The stomachs of the specimens examined contained a large number of small annelids. 
These worms are small mud-inhabiting Oligocheta. The contents of the three 
stomachs are tabulated here: 
Length. Loeality. Entomostraca. Insect Larvee. | Annelida. 
el : =| = 2 
140 mm. hbk a oonescace | 3 1 | 43 
130 mm. IRQIEEI Gen acodoous 9 4 18 
120 mm. [[Keumallcaeyeerrceine cr ee corer OBO OA ORDO OBOE 29 
Totale. aso | 14 5 90 
