FISHES PERCI DAE CALLIURUS MICROPS. 



17 



List of specimens. 



5. CALLIUEUS MICROPS, Grd. 

 PLATE IV, FIGS. 58. 



SPEC. CHAR. Mouth moderate ; gape oblique upwards. Posterior extremity of maxillary extending to a vertical line drawn 

 midway between the anterior rim of the orbit and the pupil. Eye small. Insertion of ventrals situated posteriorly to the 

 base of pectorals and the origin of the dorsal ; their tips not reaching the vent. Scales moderate. Reddish brown above, 

 with centre of scales lighter ; greyish beneath. Soft portion of dorsal provided with a black patch. 



STN. Galliums microps, GRD. in Proc. Acad. Nat. Sc. Philad. November, 1857. 



This species is very characteristic, owing to the comparatively small size of its eyes and the 

 reduced cleft of its mouth, to which might be added the disproportional size between the scales 

 on the cheeks and those on the opercular apparatus. The posterior extremities of both the dorsal 

 and anal fins do not extend as far back as the insertion of the caudal. 



The head constitutes a little less than the third of the total length, which is exactly three 

 times the greatest depth. The outline of the body is rather regularly elliptical. The edge of 

 the preopercle is minutely serrated. 



The scales are higher than long ; the pectinations of their posterior margin being altogether 

 obliterated. 



Br. VI: VI; D X, 11; A III, 9; 03, 1,8, 7, 1, 2; VI, 5; P 13. 



The extremities of the pectorals are nearly even with the tips of the ventrals, which do not 

 reach the vent, situated a little way in advance of the anterior margin of the anal fin. 



The dorsal region is dark reddish brown, as well as the upper surface of the head. The sides 

 of the head and flanks are of a lighter hue ; and since the middle of the scales on the latter 

 region are marked with a very light spot, the sides of the body appear as if provided with 

 longitudinal white stripes. The inferior region is greyish or whitish. The fins are unicolor, 

 of a greyish olive ; the posterior portion of the dorsal fin alone exhibiting a dark or jet black 

 spot. 



References to the figures. Plate IV, fig. 5, represents Galliums microps, size of life. Fig. 6, 

 is a scale from the dorsal region. Fig. 7, a scale from the lateral line ; and, Fig. 8, a scale 

 from the abdominal region. 

 3a 



