382 REPORT OF THE COMMISSIONER OF FISHERIES. 
slightly. Of 22 females examined, 3 had 8 pyloric cceca each and the 
remainder but 2. Of 22 males 4 had 3 cceca and the remainder 2. In 
all the specimens of each species when but 2 pyloric cceca oceur they 
are located 1 on either side of the cecum. The 2 appendages are 
never opposite. In all cases the right ccecum is located about its width 
in front of the left. When 3 appendages are present the third is 
Cut 5.—Alimentary canal of Typhlich- 
thys subterraneus, side view, showing Cur 6.—Ambiyopsis speleus, showing 
gall-sae. three pyloric cceca. 
always just back of the normal one, the 2 normal appendages retaining 
their usual positions. Cut 7 shows the normal position of the pyloric 
cceca (7?) in Amblyopsis. Cut 6 shows the 8 ceca in another speci- 
men. But 1 specimen of 7roglichthys rose Eigenmann was examined 
and this had 2 pylorie ceca (cut 9). 
The general characters of the Amblyopside may be summed up as 
follows: Body varying considerably in shape in the different genera, 
Cut 7.—Alimentary canal of Amblyopsis speleus. A, air bladder; G, gall-sac; P, pylorie coeca; 
S, spleen. 
but in all rather heavy anteriorly and the posterior portion com- 
pressed; head more or less depressed, its upper surface quite flat in 
Amblyopsis; mouth large, the lower jaw generally projecting beyond 
the upper; premaxillary not strictly protractile, although not firmly 
joined to the ethmoid, and forming the entire margin of the upper 
jaw; bands of villiform teeth on the dentary, premaxillary, and pala- 
tine bones; branchiostegal rays 6; gillrakers very short; gill mem- 
? 
