356 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



diameter of eye, 6; length of snout, 6; axial length, of snout, 4; 

 length of maxillary (from middle of premaxillaries), 8.5; width of 

 mouth between the outer angles, 13.5; length of gill-slit, 9.8; distance 

 from tip of snout to vent, 20; to lowest pectoral ray, 15.5; distance 

 between lowest pectoral rays of the two sides, 5; distance from tip of 

 snout to front of anal, 33; to front of dorsal, 24; length of pectoral 

 base, 12.5; longest ray of upper lobe, 14.5; longest ray of lower lobe, 

 17. Dorsal, 3 + 46; anal, 44; pectoral, 18. 



Head short and broad, with large eyes and very short snout, the 

 latter protruding slightly beyond the mouth; mouth horizontal, the w 

 maxillary reaching to below middle of eye. Teeth acute, simple. 

 Nostril single, without tube. Gill-opening extending down to opposite 

 the tenth or eleventh pectoral ray. Pectoral inserted high, the upper 

 ray on level of middle of eye, the lower ray in a vertical line which 

 falls behind the orbit; the two fins well separated below. All the 

 rays of lower lobe are widely exserted; none extend beyond front of 

 anal. The lobes are short, and are connected a rather deep notch, 

 with two or three widely spaced rays. Anus below the middle of the 

 opercle. 



Dorsal beginning above the upper end of gill-slit, the first three 

 rays exceedingly delicate and spine-like, apparently separated from the 

 others by a short interval of membrane which contains no rays. 

 The caudal contains four fully developed rays, its basal third joined 

 to dorsal and anal. 



Color translucent or whitish throughout, the sides with minute 

 distant black specks, visible only with aid of a lens. Mouth gill 

 cavity and peritoneum without black pigment. 



Only the type known. 



PARALIPARIS CAUDATUS, new species. 

 Plate 18, fig. 14. 



Type-specimen. — Cat. No. 75815, U.S.N.M., 86 mm. in total 

 length (77 mm. to base of caudal), from station 4527, Monterey Bay, 

 183 to 337 fathoms. 



Resembling P. ulocMr in the restricted gill-slit and the wide 

 pectoral, but differing among other characters in the shorter, deeper 

 body, and the wider, many-rayed caudal fin. In P. ulocMr, the 

 trunk tapers to an extremely slender tail, the fin composed of but 

 4 rays. In P. caudatus, the base of the caudal has an easily apprecia- 

 ble width and the fin contains 10 or 11 rays. 



Length of head thirty one-hundredths of total length to base of 

 caudal; greatest width of head, 17; greatest depth (at nape), 26; 

 length of snout, 9 ; diameter of eye, 5 ; interorbital width, 12 ; length 

 of maxillary, 13; width at outer angles of mouth, 15; width of gill- 



