294 Trof. M'Intosli's Xotcs from (lie 



sj)eck?, separated by an incli from eacli other, also occurred 

 behind this, about | im-h above the lateral line. From the 

 anterior area a coloured belt proceeded along the edge of the 

 dorsal fin about IJ inch backwards, and a similar marginal 

 belt occurred on the anal fin for fully 2 inches, the inter- 

 spinous region in both bearing the pigment. The under 

 surface was entirely white. 



2. A second example, procured at the same time and 

 measuring 10^ inches long, had only the dorsal surface of the 

 head and the tail coloured normally. The former coloration 

 extended to about a quarter of an inch behind the eye and the 

 irregular postrrior border proceeded obliquely downward to 

 the edge of tlie operculum. Part of the opercuLir region was 

 thus white, part coloured, the pigmented region, from the 

 shape of the parts, being rhomboidal and about an inch broad. 

 The coloured part at the tail was about If inch, with an 

 irregular anterior margin. The rest of the dorsum was pure 

 Avhite, with the exception of slight streaks of pigment in the 

 interspinous regions of both dorsal and ventral fins, and two 

 streaks which followed the forks of two pectoral rays. A 

 little more than an inch behind the tips of the ])elvic fins a 

 triangular depression running from the anal fin about f inch 

 inward marked the site of what appeared to have been an 

 injury, now healed. The pigment on the slightly incurved 

 anal fin was best marked at the site of the injury, which 

 a])peared to have occurred during the early adolescent con- 

 dition. A dimple about a quarter of an inch from the lateral 

 line on the left side of the fish seemed also to be connected 

 with this injury. The under (left) surface was pure white. 



3. A plaice 9 inches in length and well nourished. The 

 entire upper surface was pure white, except the head, the 

 pelvic fin, and a few touches on dorsal, anal, and caudal fins. 

 The head, with the exception of the upper part of the oper- 

 culum (above the base of the pectoral fin), was of the normal 

 dark hue, the pigment of the lower margin of the operculum 

 being boldly separated from the white shoulder behind it.^ 

 The pigment-line dorsally passed to the right of the termina-* 

 tion of the dorsal fin, bounded the eye, and then slanted 

 irregularly to join the opercular pigment. The right pelvic 

 fin was coloured, as also was a small patch of the margin in 

 front of the vent, whilst a touch of pigment occurred on the 

 tip of the pectoral. The dorsal and ventral fins had various 

 slight bands of colour chiefiy on the region between the rays. 

 The caudal had a median longitudinal bar and faint pigment- 

 lines on the fin on each side of it (dorsal or right surface). 

 The under suiface was entirely white. 



