40 



BULLETIN OF THE BUREAU OF FISHERIES. 



Dorsals wholly separate, the interspace between base of last spine and origin of second dorsal equal- 

 ing two-fifths diameter of orbit; origin of anal under third dorsal ray, the last anal ray under the third 

 from the last of the dorsal; caudal truncate or gently rounded; pectoral rays all simple, some of the 

 uppermost of the thickened rays the longest in the fin, extending to base of fourth anal ray; ventrals 

 reaching base of anal papilla. 



Anal papilla very large, of nearly uniform width from base to apex, provided at the abruptly 

 rounded tip with a short ciu-ved uncinate process which springs from the posterior (dorsal) side and 



/■'A^. 



Fig. 2. — Icelus uncinalis, new species. Type. 



extends a very short distance beyond the tip of the basal portion. This is strikingly different from 

 the shape in the Atlantic Icelus bicornis, in which the basal segment is comparatively short and is ter- 

 minated by a long, gently tapering process, about as long as the basal portion, from the summit of which 

 it springs. 



Top and sides of head covered more or less completely with verj' fine prickles; a band of similar 

 prickles along back, just dorsad of the series of spinous plates; plates of the lateral line with the upper 



posterior margin free and spinous, some of the middle spines often pro- 

 duced, dividing the margin of the plate into an upper horizontal and 

 a posterior vertical portion; plates of dorsal series similar but usually 

 larger, the spinous margin more rounded; a few spinous scales behind 

 upper part of pectoral, distant from one another, but arranged rather 

 definitely in series running downward and backward; lateral line always 

 complete; dorsal series of scales commonly terminating on middle of 

 back of caudal peduncle. 



Color in spirits: Olive-gray, with four well-defined dark bars on 

 back, little or not at all broken up by lighter lines, and preserving a 

 characteristic form; anterior bar springing from posterior half of base 

 of spinous dorsal running downward and forward to gill slit above base 

 of pectoral, its anterior margin less sharply defined than tlie posterior margin; second bar under fifth 

 to ninth rays of second dorsal, the anterior margin nearly vertical, the posterior passing downward and 

 forward usually with a double ciuve, the bar terminating in a narrow V-shaped process below lateral 

 line; third bar under last 5 or 6 dorsal rays, forming a short sharply defined saddle-shaped blotch which 

 usually fails to reach the lateral line; fourth baron base of tail, not appearing either above or below on 

 caudal peduncle; there may be fainter dusky marks between the bars and sometimes a series of irregular 

 dark spots or blotches below the lateral line; top and sides of head somewhat darker than the trunk. 



/4 itx. 



Fig. 2a. — Icelus undnalis, anal 

 papilla, posterior view. 



