REVISION OF THE FISH FAMILY LIPARIDAE 63 



tions examined contained specimens from points as far south as Port 

 Townsend, Wash., and as far north as St. Paul Island, Bering Sea. 

 The author doubtfully records three small and poorly preserved 

 specimens form Petropavlosk and Plover Bay, Siberia. This species 

 is not found in tide pools in its southern range. 



Relationsliijp . — L. callyodon appears to be most closely related to 

 L. curilensisoi the Kurile Islands. It appears to differ from the latter 

 species mainly in the smaller size of the ventral disk. In other re- 

 spects the two species appear similar. 



Synopsis. — Dorsal 33-35; anal 26-27; pectoral 29-31; pyloric coeca 

 42-66. Disk moderate, 2.2-3 in the head. Gill sht either above the 

 pectoral or extending down in front of the upper pectoral ray. Dorsal 

 fin distinctly notched. Dorsal and anal connection with the caudal 

 not extending beyond the skin covered base of the latter. Pricldes 

 never present. Coloration variable; for a description of the several 

 types see remarks. A small sized species reaching a length of about 

 100 mm. 



Remarks. — The gill slit in this species varies somewhat. It may 

 appear to be above the pectoral or extending down in front of the 

 upper ray. The following types of coloration are exhibited by speci- 

 mens in the United States National Museum. 



(1) Purphsh above, varying to olive-brown on the sides, paler 

 below; fins finely crossbarred or not. 



(2) Light olive to an olive brown; fins finely barred. 



(3) Tawny to olive brown, paler below, punctulate with dark dots; 

 fins faintly barred. 



(4) Olive brown mottled -with ash; the sides sometimes with 

 round dark spots about the size of the pupil. 



In addition to the variation in the coloration there is considerable 

 variation in shape and depth of body and head in specimens from 

 different localities. The variation in the number of fin rays and size 

 of disk falls within narrow limits and the author is unable to satis- 

 factorily designate local races. With the acquisition of more data 

 it may be possible to divide the species into local races based on color 

 and form. Other tide-pool species of Bering Sea, such as Pallasina 

 carhata, exhibit local peculiarities. The islands of Bering Sea offer 

 a splendid opportunity to study the effect of deep channels as bar- 

 riers to the ready dispersal of the tide-pool species and if they act 

 as barriers, the eft'ect of isolation in the formation of species. ;j 



Some of our specimens from Bering Island, collected by Greb- 

 nitzki, agree fairl}' well with the description of L. grelnitzkii Schmidt. 

 L. grebnitzkii appears to be a color form of L. callyodon. 



