PISHES OP ARCTIC ALASKA. 505 



Body tadpole like; head rounded and very little compressed; abdomen slightly 

 distended; just back of the abdomen the body is suddenly compressed to a width 

 equaling one-third its height, and from this point the body gradually tapers to the 

 caudal, its height and width keeping the same proportions; the height of the base of 

 the caudal equals the diameter of the eye; the maxillary extends to posterior edge of 

 eye, and its end is concealed in the skin of the head ; upper jaw slightly longer than 

 lower; teeth tricuspid; interorbital space flat; nape slightly elevated; gill openings 

 small, the width of the slit equaling the interorbital space ; the lower edge of the slit 

 even with the first pectoral ray; the posterior nostrils end iu very short, compressed 

 tubules, about one-half diameter of eye in front of eye; the anterior nostrils are simple 

 and placed directly in front of the posterior nostrils, separated from them by a dis- 

 tance equal to one-half diameter of eye. 



The dorsal begins on a vertical line drawn from posterior edge of gill flap ; the 

 anterior rays are short, gradually lengthening till middle of fln is reached, where the 

 rays equal 2 J times the diameter of the eye; the last rays are scarcely shortened and 

 do not form a notch at its junction with the caudal; the last rays encroach on the 

 caudal for one-fourth of its length. The anal is the same shape as the dorsal and of 

 the same height; its last rays encroach on the caudal for one-third its length. The 

 upper lobe of the pectorals is composed of 25 rays; the eleventh and longest ray is 

 contained IJ times in the head; the length of the twenty-fifth is contained 4 times in 

 the head; the lower lobe is composed of ten rays, of which the third from the last, or 

 twenty- third, is longest, being contained in the head 2-1^ times; the membrane between 

 the last four rays is incised. The caudal is slender, and rounded behind; its length is 

 contained a little more than twice in head. 



The diameter of the ventral disk is contained 8 times in length of body. Skin 

 very loose, attached only' at opercle and to the ends of the last rays of the dorsal and 

 anal and to the base of the caudal. The color of the body is dark, due to black 

 punctulations; the belly and the underside of the head is free from markings; the 

 last half of the dorsal is darker than the anterior half; the anal is mottled with 

 black; the caudal has two black vertical bands, the first just back of the tips of 

 the last dorsal and anal rays; the second band is slender and faint and is at the top 

 of the fin. 



Several specimens were taken at Herschel Island. The longest specimen is 2J 

 inches long. 



The fish is nearest like L. tunicatus, from the coast of Greenland, and appears to 

 be intermediate between it and\2y. agassizii. 



29. Lycodalepis turner! (Bean). 



We obtained one specimen 8J inches long of this species at Point Barrow, Alaska. 

 It was washed on the beach during a storm and was found in a dried-up condition, so 

 that the normal width of the head and distance between the eyes can not be deter- 

 mined. It corresponds almost exactly with the figure of the type (Turner's Nat. Hist. 

 Alaska, 93); the light bands aicross the back and dorsal are not so regular; the third 

 , and fourth being slightly broken up. D., 86 ; A., 67 ; P., 18, reaching to sixth pectoral 

 ray. The teeth are all strong, with rounded points. The teeth on upper jaw in a 

 single series with no smaller teeth in front about the symphysis. Teeth on lower jaw 

 in a single complete series with another short series around the symphysis in front. 



