28f>6 Bulletin 47, United States National Museum. 



base of caudal at end of basal seventh of outer caudal ray ; longest caudal 

 ray 2 in head; lower 7 pectoral rays thickened, forming a lobe, the distal 

 third of each ray free from the membrane ; longest pectoral ray 1 in head ; 

 disk of moderate size, anteriorly placed, its posterior margin under the 

 gill slit, its length \ that of head. Color translucent, apparently light 

 grayish or purplish in life, the dorsal region, including dorsal fin, marked 

 with many large round spots, probably reddish in life, each spot sur- 

 rounded with a faint darker ring. A large species, soft and gelatinous in 

 texture, the color translucent grayish or purplish, marked on back with 

 many large light circles which were probably reddish in life. Type, a 

 specimen 330 mm. long, from Albatross Station 3643, off Provostmaya, 

 Kamchatka, at a depth of 100 fathoms. Bering Sea; 1 specimen from 

 Kamchatka, a smaller one dredged off St. Paul Island, Pribilof group. 

 (mirdbilis, wonderful.) 



Crystallichthys mirabilis, JORDAN & GILBERT, Kept. Fur Seal Invest., MS., 1898, Provost- 

 maya, Kamchatka. (Coll. Albatross.) 



Page 2129. Allurus is preoccupied by Allurus, Forster, 1862, a genus of 

 Hymenoptera; also by Allurus, Eisen, 1874, a genus of worms. We sub- 

 stitute for our use of it the name Allinectes. 

 Allinectes, JORDAN & EVERMANN, new subgenus (ectenes). 



Page 2131, line 7, for "Alldurus" read "Allurus." In lines 4 and 7, for 

 read 



Page 2137. After Careproctus ectenes add: 



787(3). PROGNURUS, Jordan & Evermann, new genus. 

 Prognurus, JORDAN & EVERMANN, new genus (cypselurus). 



This genus is distinguished from Careproctus by the very elongate cau- 

 dal which is forked at the tip. (itpoyvr], a swallow or martin; ovpd, 

 tail.) 



2469 (a). PROGNURUS CTPSELURUS, Jordan & Gilbert, new species. 



Head 4| in length ; depth 4vV ; cleft of mouth If in head, distance from 

 symphysis of lower jaw to angle of mouth; total interorbital width 2 in 

 head; eye large, equaling length of snout, 3| in head; gill opening 

 entirely above base of pectoral, not reaching base of upper ray, its length 

 3 in head; opercular lobe broadly rounded. Snout blunt, broadly 

 rounded, the mouth horizontal along its lower margin, scarcely overlap- 

 ped by it; upper lip wide. Teeth acute, without cusps, in about 27 

 oblique rows in 1 side of each jaw; maxillary reaching the vertical 

 from posterior edge of the pupil ; nostril opening in a wide, low tube. 

 Front margin of ventral disk very slightly behind angle of mouth, its 

 diameter f that of eye, about | length of head. Pectorals broadly 

 rounded, regularly shortened below, not deeply notched, the lower 7 rays 

 thickened and exserted; the longest free ray about | length of head; 

 upper portion of fin with 26 rays, the tips only protruding, the longest 

 equaling length of head; dorsal beginning shortly behind vertical from 

 gill slit, its distance from tip of snout 3| in length ; dorsal with about 58 

 rays; caudal very long and narrow, only its basal third connate with last 



