448 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



107. Bathtyphasma ovigeruni sji. iiov. 



Occipital region greatly cliivated, the upper protile of head strongly decurved 

 above the orbits, a line from occiput to end of preniaxillary processes forming an 

 angle of 45 degrees with axis of body. In front of tips of premaxillary processes 

 the snout descends almost vertically. Posteriorly tlie body tapers uniformly and 

 slowly, the width of base of tail equaling one-half diameter of eye. Length of head 

 equaling depth of body, 3^ in length. Mouth largo, horizontal, not overpassed by 

 the snout; the lower jaw slightly shorter than the uppei-, not distinctly included. 

 The maxillary reaches a vertical from posterior edge of orbit, its length 2^ in head, 

 its width 1,'; in head. Ui)per lip complete, the fold of lower lip extending half way 

 from angle of mouth to symphysis. 



Bands of teeth very wide in the front of each Jaw, becoming narrower laterally 

 where the series are few in number and nearly parallel with the jaw. Anteriorly 

 the series grow more and more oblique, until at front of jaw they are nearly trans- 

 verse. The teeth are all simple and slender, without cusps, directed very obliquely 

 backward, and movably implanted bo as to admit of still further depression. The 

 outer teeth in both jaws are very short, the inner ones growing gradually longer 

 and becoming acicular; 16 series of teeth on each side of lower jaw, 22 series on 

 each side of upper j aw. 



Posterior nostril in a short, wide tube Eye large, the diameter of its exposed 

 portion 2| iu total interorbital width, 7 in head. Cheeks and temporal region 

 swollen, the suborbital stay running in a notable depression between the two. Gill-slit 

 wide, extending downward to ojiiiosite upper pectoral rays, longer than snout, 2J 

 in head. Mucous pores minute, on sides of snout, mandible, and preojiercle, none 

 visible on top of head. 



Disk large, nearly round, its center slightly in advance of gill-slit, its lengths^ in 

 head, the distance from its posterior margin to vent equaling four-fifths its own 

 diameter. A small anal papilla. Pyloric ccpca 19. 



Pectoral with 34 rays, not notched, the lower rays regularly diminishing in length 

 to the fifth or sixth before the last, the next two or three abruptly lengthened and 

 exserted. The longest ray of upper lobe equals length of snout and eye; the longest 

 rays of lower lobe equals length of snout and half eye. The dorsal fin begins 

 slightly behind upper axil of pectorals and contains 43 rays, the longest of which 

 equals the distance from tip of snout to front of pupil. The origin of anal fin is half 

 the diameter of the eye in front of the middle of body. It contains 34 rays. Caudal 

 ray long and slender, with 12 rays, its basal two-fifths confluent with dorsal and 

 anal, its length efiual to that of pectoral fin. 



Skin thin, not conspicuously lax. Head, body, and fins white, inconspicuously 

 mottled with light brown. A single specimen, 315 mm. in total length, from station 

 3342, off Queen Charlotte Islands, depth 1,588 fathoms. 



The type is a male with well-developed testes, and contained in its mouth when 

 captured a spherical mass of eggs evidently belonging to this species, The eggs 

 measure 4^ mm. in diameter, and are well along in their development, the embryos 

 distinctly visible through the very tough egg-membranes. The general form of head 

 and body can be made out, and the long, continuous dorsal and anal fins running 

 backward into the tail. It is probable that the male fish protects the eggs in this 

 manner until after hatching. 



Family CYCLOPTERID^. 



108. EumicrotremuB orbis (Giinther). 



Three young specimens, the largest 27 mm. long, were dredged south of Sannak 

 Islands and in Bristol Bay (stations 3213, 3258, and 3274; depths 19 to 70 fathoms). 

 Fin-rays in our specimens are as follows : Dorsal vi or vii-9 or 10; anal 8 to 10. We 

 agree with Ciarman in considering it advisable to distinguish the north Pacific form 

 from E. 8]}inoau8, until adequate series can be compared. 



