F/SHES — CYPRINIDAE — TIGOMA CRA8SA. 



203 



List of specimens. 



7. TIGOMA GRACILIS, Grd. 



Spec Char. — Body elongated, sub-fusiform in profile. Head contained about four times and a half in the total length. 

 Snout sub-conical, rather abbreviated ; gape of moulh somewhat oblique ; posterior extremity of the maxillary extending to a 

 vertical line drawn immediately in front of the orbit. Eye moderate, sub-circular; its diameter entering five times in the length 

 of the side of the head. Anterior margin of dorsal fin nearer the extremity of the snout than the tip of the upper lobe of the 

 caudal. Origin of ventrals nearer the fork of the caudal than the extremity of the snout. Scales small. Bluish grey above ; 

 yellowish beneath. 



Sia.—Tigoma gracilis, Grd. in Proc. Acad. Nat. Sc, Philad. VIII, 1856, 206. 



The body is elongated and compressed, sub-fusiform, resembling T. lineata, but the body and 

 head both are proportionally more elongated. The ventrals are inserted but slightly in advance 

 of the anterior margin of the dorsal ; they are posteriorly rounded, their tips not reaching 

 quite the vent. The pectorals are narrow and elongated. Their extremities being very far 

 from reaching the vent. The dorsal and anal are sub-trapezoid, the former higher, and the 

 second deeper, than long. The dorsal being somewhat larger than the anal, the anterior 

 margin of which is much nearer the tip of the inferior lobe of the caudal than the isthmus, 

 whilst its own base enters about eleven times in the total length, the caudal fin excluded. The 

 formula of the fins is : 



D 1, 8 ; A 2, 7 + 1 ; C 6, 1, 9, 8, 1, 7 ; V 1, 9 ; P 16. 



The scales are proportionally small, smaller than in T. lineata, especially on the dorsal 

 region. The lateral line is slightly deflexed, running a little below the middle of the flanks. 



The upper regions and sides of the body and head are bluish grey, the sides being somewhat 

 lighter than the back. The inferior regions are yellowish- white, unicolor. The dorsal and 

 caudal are greyish yellow, the remaining fins being yellowish or straw color. 



List of specimens. 



8. TIGOMA CRASSA, Grd. 

 Plate LXII. 



Spec. Char. — Body plump and contracted. Head rather small, constituting about the fifth of the total length. Snout short 

 and depressed, rounded off anteriorly. Mouth moderate ; posterior extremity of maxillary extending to a vertical line drawn 

 behind the nostrils. Eye small ; its diameter entering six times in the length of the side of the head. Anterior margin of 

 dorsal fin equidistant between the extremity of the snout and the fork of the caudal. Origin of ventrals nearer the isthmus 

 than the insertion of the caudal. Pectorals and ventrals small. Scales large. Upper region deep bluish or purplish black, 

 lighter on the sides ; beneath yellow. 



Syn.— rig-omo craasa, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 207. 



