FISHES—CYPRINIDAE—TIGOMA CRASSA. 
2S3 
List of specimens. 
Catal. 
Cor. No. 
No. of 
Age. 
Locality. 
When 
Whence obtained. 
Nature of 
Collected by— 
No. 
of teeth 
spec. 
collected 
specimen. 
229 
2783 
6 
Ad’t. & y’g. 
1854 
Lt. E. G. Beckwith . 
Alcoholic. 
7. TIGOMA GRACILIS, Grcl. 
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. 
Syn. —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. 
Catal. 
No. 
Cor. No. 
of teeth. 
No. of 
spec. 
Age. 
Locality. 
When 
collected. 
Whence obtained. 
Nature of 
specimen. 
Collected by— 
230 
2784 
2 
?. 
1854 
Lt. E. G. Beckwith.. 
Alcoholic. 
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. —Tigoma crassa, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 207. 
