114 CALIFORNIA ACADEMY OF SCIENCES. 



Nematopoma Gill, '58a, 68 (searlesii). 



Type: Stevardia albipinnis Gill. 



As far as known, the members of this genus, four in num- 

 ber, are confined to the Island of Trinidad. The species^ 

 were at first described under three generic names. We 

 have followed Dr. Giinther in uniting them. The nam a 

 Stevardia, however, has priority over Corynopoma. 



ANALYSIS OF THE SPECIES. 



a. Anal rays decreasing in height backward; caudal lobes subequal. 



6. Opercle with a triangular, spiniform dilation behind. Eye 3J in head,. 

 1 in interorbital. Dorsal ^ higher than long. D. 10; A. 20; 1.1. 40; taiJ 

 with a dark lateral stripe; fins white. {Stevardia.) albipinnis 1^ 



bb. Opercle with a posterior triangular dilation, continued in a more or 

 less long and slender compressed process; last two or three anal rays^ 

 produced. {Corynopoma.) 



c. D. 8; A. 27. Auid three times as long as the dorsal; opercular pro- 

 cess deflected, advancing but little beyond the inner angle of the base^ 

 of the pectoral; color as in albipinnis. riisei 2. 



cc. D. 9; A. 31. Dorsal more than twice as high as long; opercular 

 process deflected at its base, then advancing upward with a curve 

 and terminating on a line with the base of the ventral; color as above. 



veedonii 3. 

 aa. Anal rajs increasing in height posteriorly; lower caudal lobe much 

 longer than upper; opercular process continued in a filament which ex- 

 tends beyond the dorsal. D. 10; A. 26-29; Lat. 1. 42. Eye less than S 

 in head, more than 1 in interorbital. Highest dorsal ray five times the 

 length of the base of the dorsal. Base of anal 3J that of the dorsal, its 

 height not much more than half that of the dorsal. Pectorals extending 

 as far as the ventrals, beyond the origin of the anal. searlesii 4.^ 



1. Stevardia albipinnis. 



Stevardia albipinnis Gill '58a, 65 (Trinidad). 

 Corynopoma albipinne Gthr. '64, 287 (copied). 



2. Stevardia riisei, 



Corynopoma riisei Gill '58a, 66 (Trinidad); Gthr. '64, 287 (copied). 

 Liitk. '74a, 224. 



3. Stevardia veedonii. 



Corynopoma veedonii Gill '58a, 67 (Trinidad); Gthr. '64, 287 (copied)., 



4. Stevardia searlesii. 



Nematopoma searlesii Gill '58a, 69 (Trinidad). 



Corynopoma searlesii Gthr. '64, 288 (copied); Liitk. '74a, 222 witk 

 fig. (Trinidad). 



