462 CALIFORNIA ACADEMY OF SCIENCES. 



in front of the adipose dorsal, the lateral scutes meeting 

 or barely separated below on the caudal portion of the 

 body; the two or three scutes separated on the abdomen 

 by a diameter of the pupil. Margins of the scutes finely 

 ctenoid, their surface somewhat hispid. 



Coracoid processes meeting on the breast in the ? ; the 

 inner margin free and overlapping in the S . 



Distance of the dorsal spine from the snout 23 in the 

 length; the dorsal spine not flattened, nearly smooth in 

 front, 1|-1|- in the head; the first and second soft rays 

 highest, higher than the fin's base; the spine of the adi- 

 pose fin similar to but lower than that of the dorsal fin. 



Caudal deeply emarginate. 



Anal obliquely rounded, much higher than long. 



Ventrals 1|- in the head. 



Pectoral spine scarcely flattened, about 1^^ in the head 

 in the ? , little longer in the 5 ; its outer margin hispid, 

 its inner finely serrate. 



Dark spots along middle of sides, smaller ones on the 

 back and on sides of head, smaller spots on the top of 

 the head; fins nearly plain, transparent, the caudal and 

 pectorals sometimes obscurely spotted. 



Head 3i; depth Sl-Sl; D. I, 8; A. I, 7; V. 6; Lat. pi. 



3 4^ 3 5 

 3 3 • 



Fifty-eight specimens. Cudajas; Tabatinga; Porto do 

 Moz. 



XCIX. DiANEMA. 



Dianema Cope, Proc. Acad. Nat. Sci. Phil. 1871, 276 

 (longib(irbis). 



Type: Dianema longiharhis Cope. 



Maxillary barbels single; two barbels near the sym- 

 physis; coracoid process exposed and expanded, cover- 

 ing the entire breast and belly; lateral shields meeting 

 along the median lines of the back and belly. Adipose 

 fin with an anterior spine. 



