376 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 42. 



of gill slit 3.5; greatest depth of body 19; distance from tip of snout 

 to front of disk 15.5; to anus 27; to front of anal fin 36; to front of 

 dorsal 28; diameter of disk 9; distance from disk to anus 3; longest 

 pectoral ray of upper lobe 13; of lower lobe 15; shortest ray in 

 notch 6. 



Dorsal 54; anal 47; pectoral 31. 



Body elongate, with heavy head, vertical cheeks and short bluntly 

 rounded snout which protrudes slightly beyond mouth; nostril in 

 front of eye, slightly above its middle, the rim a little raised; gill 

 slit short, entirely above upper pectoral ray; disk moderate, deeply 



cupped, its anterior margin promi- 

 nent, with the appearance of a pro- 

 jecting lobe; vent close behind disk, 

 separated from it by about one-third 

 diameter of disk. (Fig. 18.) ~ Pec- 

 torals broad, rather shallowly notched, 

 the lower lobe short, extending little 



Fig. 18.— Relative size and position of behind the VCnt. 



VENT AND DISK OF careproctus entar- §^^11 priclvles scattercd over head 



GYREUS. ^ 



and body. 



Color light, without red in life, the lining of mouth and gill cavity 

 not dusky; peritoneum silvery, with scattered black dots, instead of 

 jet black as in 0. entomelas. 



Agreeing in most respects with C. entomelas, but with less black 

 pigment, and with the pupil reduced to a minute pore, while in C. 

 entomelas it is of the usual size, nearly half the diameter of the eye. 



A single cotype, from the Gulf of Tartary (station 5003, 35 fath- 

 oms) agrees with the type in all respects. 



26. CRYSTALLIAS MATSUSHIM^ Jordan and Snyder. 



Crystallias matsusMmx Jordan and Snyder, Proc. U. S. Nat. Mus., vol. 24, 

 1902, p. 350, fig. 2 (Matsushima Bay, Japan). 



This species, known hitherto from a single specimen from the Bay 

 of Matsushima, is represented in the present collection by eight indi- 

 viduals from the Sea of Japan and the Southern Okhotsk. Owing to 

 the poor condition of the type-specimen, the original description was 

 incomplete and the following details are here supplied: 



Measurements in hundredths of length without caudal (197 mm.): 

 Length of head 30; diameter of eye 5.5; length of snout 13; inter- 

 ocular width 13; projection of snout beyond the mouth 8; length of 

 gill slit 5; distance from tip of mandible to front of disk 8; to anus 

 17; diameter of disk 7.5; depth of body 35; longest pectoral ray of 

 upper lobe 21 ; of lower lobe 1 1 ; length of caudal 13 ; length of attach- 

 ment between caudal and anal 9. 



Dorsal 57; anal 50; pectoral 33; caudal 13, 6 in upper half, 7 in 

 the lower; pyloric caeca 54. 



