Vol. 3] Stark s-M orris. —Marine Fishes. 163 



Family SCYLLIORHINID.^]. 

 4. Catulus uter Jordan and Gilbert. 



SWELL SHARK. 



(Jordan and Evermann, 1896, I, p. 25, fig. 12.) 

 This small shark is common in the Santa Barbara Channel, 

 and is often taken in the traps set for spiny lobsters. It has the 

 peculiar habit of inflating its stomach with air like a globe fish 

 when canght. It has been recorded at Monterey by Jordan and 

 Gilbert (1880, p. 458). 



Family CARCHARIID.E. 

 5. Mustelus californicus (4ill. 



DOG SHARK. 



{Galeus californicus Jordan and Evermann, 1896, I, p. 30.) 



This is the commonest shark in. Southern California, great 

 numbers being taken in seines and on set-lines in San Diego Bay. 



From the 20th of May (the date of our arrival in 1905) to the 

 middle of June, this species was comparatively scarce. Though 

 set-lines were continually nsed, only thirty specimens were taken, 

 all of which were females. After the latter date, large numbers 

 were taken, the males being M^ell represented. 



This species closely resembles Cynias lunulatus, of the coast 

 of Lower California and southward. It differs from it in having 

 a shorter, more rounded snout, a less angulated mouth, a more 

 anterior first dorsal, a shorter pectoral, and the apex of the first 

 dorsal more anterior to its posterior tip. The differences of the 

 shorter snout and broader mouth appear much greater than ac- 

 tual measurements indicate. 



The distance from the tip of the snout to the insertion of the 

 pectoral is contained from 51/5 to 5% in the entire length to the 

 tip of the caudal in Mustelus californicus, while in Cynias lunu- 

 latus it is from 4% to 434. The snout measured obliquely across 

 top of head to eye is contained from 4 to 41/0 in distance from tip 

 of snout to first dorsal in the former species ; in C. lunulatus it is 



