FISHES FROM BERING SEA AND KAMCHATKA. 



73 



Cyclogaster (?) cyclopus (Giinthcr). 



Two small specimens were taken at Petropavlovsk. Length 30 to 60 mm. 



We have compared these specimens with tliree specimens of C. cyclopus from Puget Sound and 

 station 3230, Bering Sea. They differ from the latter in having the profile evenly rounded instead of 

 concave, the interorbital rounded instead of flattened, the snout evenly rounded instead of truncate, 

 the gill opening extending down in front of 3 pectoral rays instead of 5 or more, and the dorsal con- 

 sisting of 37 instead of 35 rays. 



The following characters are from the larger specimen: Head 4 in length; depth 4.66. Dorsal 37 

 anal 30; pectoral 32. Snout 3 in head; disk 2; gill opening 4.25; maxillary 2.5. 



These specimens may well belong to an imdescribed species, but our material is not adequate to 

 decide tliis point. 



Cyclogaster cyclostigma (Gilbert). (Fig. 18.) 



Head 32 hundredths of length without caudal; depth 30; eye 6; snout 12; gill slit 13; ventral disk 

 14.5; interorbital width 12; maxillary 15; distance vent from disk 11. 5; from anal fin 8.5. Dorsal 39; 

 anal 34; pectoral 40. 



Body much compressed posteriorly; greatest depth at origin of dorsal. Head wide; nape promi- 

 nent; interorbital and snout depressed; snout overlapping the broad mouth ; maxillary reaching vertical 



Fig. i^.—CydoQaster cyclostiuma (Gilbert). From Albatross station 4777. Petrel Bank, Bering Sea. depth 52 fathoms. 



from slightly behind pupil; pupil oval, vertical. Teeth strongly trilobcd, 14 or 15 oblique series in 

 the half of each jaw; superior pharyngeal teeth with small lobes. Anterior nostril in a prominent tube, 

 which is 2.5 in eye; posterior nostril with a raised rim. Gill opening large, extending down in front 

 of the upper 14 pectoral rays. Pyloric caeca 30 (from cotypes). 



Origin of dorsal distinctly behind base of pectoral; last ray slightly shortened, connecting with 0.2 

 of the caudal; anal similar to dorsal, connecting with 0.4 of the caudal; caudal rounded, 1.83 in head; 

 pectoral broad, the upper lobe reaching anal, lower lobe composed of 8 rays and reaching nearly to 

 vent. Ventral disk large; distance from tip of lower jaw to disk 2.5 in head, from disk to anal 1.8. Vent 

 slightly nearer anal than disk. 



Skin thin and flabby; one or two pores in short tubes near origin of lateral line; no ether trace of 

 lateral line in the type, but in the smaller cotypes a series of papillae not certainly perforate but with 

 depressed centers. 



Color in life red on head and body, slightly clouded with darker, white on lower side of head and 

 on belly; on opercular flap a black intramarginal line; fins all red, clouded or mottled with blackish, 

 the color darkest on anal and on posterior part of dorsal; on caudal, the dark markings take the form 

 of irregular crossbars; pectoral dusky toward the margin. 



This species is closely related to C. dennyi; it can be distinguished from the latter by the broad, 

 depressed snout and the larger, more prominent eye; it has a longer nostril tube, the snout projects 

 farther and the disk has a broader marginal flap. It diSers from C. ochotensis (Schmidt) in the larger 



