NO. 1907. YEW CYCLOOASTERin FISHEH—GILnERT AND BURKE. 353 



a-. Dorsal not notched anteriorly. 



c'. Last dorsal and anal rays not shortened to form a definite nc^tch at union with 



caudal (sometimes one or both slightly shortened in C. agassizii). 



dK Caudal broadly joined by basiil half or three-fourths to dorsal and anal. 



e'. Gill slit very wide, reaching level of sixteenth pectoral ray; diameter of 



disk less than one-third length of head, widely separated from vent, 



which is nearer origin of anal fin; dorsal 48; anal 37; pectoral 



35 tessellatus, 3. 



e'-. Gill slit narrower, reaching level of eighth or ninth pectoral ray; head very 

 • broad, depressed; eye very small, less than half interorbital width; 

 diameter of disk nearly half head, separated from vent by its own diame- 

 ter or more; dorsal 44; anal 34; pectoral 34 agassizii, 4. 



d^. Caudal very narrowly joined to dorsal and anal, by not more than its basal 

 fifth; head narrow, compressed; diameter of eye nearly three-fourths 

 interorbital width; diameter of disk about two-fifths length of head, 

 separated from vent by a distance less than its own diameter; dorsal 37; 



anal 31; pectoral 34 frcnatus, 5. 



c^. Last dorsal and anal rays shortened, forming a distinct notch at union with 

 caudal. 

 p. Pectoral not notched (at least in adults). 



gK Head flattened in the nasal region, snout low and projecting; gill slit 

 reaching level of tenth or eleventh pectoral ray; dorsal and anal 

 joined to basal two-thirds of catidal; diameter of disk less than half 

 length of head, widely separated from vent, which is nearer origin 



ofanalfin; dorsal 45; anal 34; pectoral 41 tanaka;,6. 



g^. Head very convex and rounded in the nasal region; snout deep and 

 short, not projecting; gill slit extending to level of tenth or eleventh 

 pectoral ray; diameter of disk 2t in head, widely separated from 



vent; dorsal 43; anal 36; pectoral 40 oustoni,!. 



p. Pectoral notched; gill slit extending down to opposite sixteenth or 



eighteenth pectoral ray; diameter of disk less than half length of head, 



separated from vent by a distance about equaling its own diameter; 



dorsal 45 to 47; anal 36 or 37; pectoral 42. 



/i'. Body stout, the depth 2.8 in length; jaws nearly equal; often with 



parallel black stripes; depth 40 to 75 fathoms ochoiensis, 8. 



h'^. Body slender, the depth 3.3 in length; upper jaw much projecting, 

 exposing nearly all the upper teeth anteriorly; no black stripes; 

 depth 250 fathoms ingens, 9. 



1. CYCLOGASTER (NEOLIPARIS) CURTLENSIS, new species. 

 Plate 41, fig. 1. 



Type. — C'at. No. 73326, U.S.N.M. Afemale, 110 mm. in total leiifctli, 

 from Milno Bay, Simiisliir Island, Japan. 



Closely related to C. caUyodan, from which it diilcrs in the larger 

 disk and the vent more posterior in position, 



Measurements in lumdredths of total length excluding the caudal 

 fin: Length of head 29; greatest width of head 24.5; greatest depth 

 of head opposite gill slit 22; greatest depth of body 25; depth 

 of caudal peduncle 9; interocular width 10; diameter of eye 4; 

 width at angles of mouth 15; distance from tip of snout to end 

 of maxillary 12; length of gill slit 6; distance from tip of snout 

 20441°— Proc.X.M.vol.42— 12 23 



