8 BULLETIN OF THE BUREAU OF FISHERIES. 
The gill rakers numbered 6 to 8+12 to 14. The air bladder is large and extends the entire length 
of the abdominal cavity. The peritoneum is immaculate. There are 135 to 140 pyloric ceca, the 
posterior ones extending in a single series along the digestive tract. There are 8 branchiostegals. 
The growth appears to be about as follows: ; 
Length in 
millimeters 
AV CATS OLD. 5060 cinss hese inv sh 2:n canes Sees TORT ee Cee aL eT ea cea ee 155 to 180 
RATS OL oo. 5) oie) seine sim apayecesniece = oPaheresalials sieegeyera spa ieee a eve ee ae 200 
ON A=) GP ADDR ORSS BESS. SUS AAS sco craccommenrT OnIgUIGg WEEMS Comes Sea ORS 255 to 260 
W VEALSIONG 2 foc 0 5 s0pa> +e sp aeiagniacereyshsimdgies Sie, -,ere wich eiete tae Shots a, Sheree ae 280 to 437 
Stoo Vea OIG pesos sinie.oictsie, auarn sud Pasties ae eee tae ee TE ann eee 420 to 470 
Old examples are fat and weigh 2!4 pounds or more. Nothing was learned of the food of the 
species except that the stomachs of specimens caught during the months of January and February 
were stuffed with whitefish eggs. These were taken on the spawning grounds of L. gemmifer and 
C. abyssicola. 
Coregonus abyssicola, new species. Bear Lake whitefish. 
Small examples of this species (8 to 10 inches long) closely resemble those of C. spilonotus except 
that the latter are spotted. With increasing age the spots of C. spilonoius grow indistinct and finally 
disappear, while the maxillary and snout elongate, and the body becomes deeper. Consequently 
when the lack of spots fails to distinguish C. abyssicola, it may be easily separated from C. spilonotus 
by its much shorter maxillary. 
Coregonus abyssicola. Bear Lake whitefish. 
Local fishermen usually distinguish between spotted examples of C. spilonotus and this species, 
both of which they call herring, but they do not seem to suspect that the spotted fishes will grow to 
become the immaculate adults of C. spilonotus. 
Mr. Stock reports that this species is taken in sufficient numbers to ship to near-by points. 
It spawns from the latter part of January to early in March at a depth of about 100 feet. 
Examples seen alive in August were moss-green above, silvery on the sides, and white beneath. 
These bleached in alcohol leaving very little dark pigment, while specimens taken during the breeding 
season are considerably darker, indicating that they are then much more highly colored. 
Spawning fishes measure from 200 to 310 millimeters in length. The males are darker than the 
females, and the scales from the middle of the back to near the ventral surface bear mucous nodules. 
The females are smooth in most cases, an occasional one having small nodules on two or three rows of 
scales above and below the lateral line. 
Type No. 83500, United States National Museum. Locality, Bear Lake near Fish Haven, 
Id'fio. Length 310 millimeters. J. P. Stock collector. 
Head 4.6 in length to base of caudal; depth 4.5; depth caudal peduncle 2.8 in head; snout 3.7; 
eye 5.2; interorbital width 3.4; maxillary 4.1; scales lateral series 78; between occiput and dorsal 30; 
above lateral line 8; below lateral line 7; dorsal 10; anal 11, 
