EEPOE.T ON THE DEEP-SEA FISHES. 187 



the body, whilst another muscle (b) draws it downwards into a line with the other pectoral 

 rays. 



The large ventrals are inserted immediately in front of the origin of the dorsal fin. 

 Its two outer rays are simple, the others broad and dichotomously split. The extremities 

 of the two outer ones and of the outer branches of the third are modified into soft, swollen, 

 long, lamelliform pads. These singular appendages extend backwards to the end of the 

 anal fin and remind us of similar structures in certain Cyprinodonts, in which the 

 appendages are sexual and peculiar to the male sex. Both the specimens of the present 

 species are females. 



The scales are of moderate size, rather irregular in shape, and cycloid. The lateral 

 line runs along the middle of the side. 



Colour light greenish with narrow black margins to the scales ; sides of the head, the 

 abdomen, and the buccal and abdominal cavities black. Vertical and ventral fins black, 

 with lighter margins; pectoral fins without colour. 



The structure of the pectoral arch (PI. XLVIII. fig. B) shows some noteworthy 

 peculiarities. The clavicle (cl) consists of a narrow subvertical branch which is slightly 

 bent in the form of a knee ; the shorter part above the knee is connected with the skull 

 by two supraclavicles (scl', scl"), of which the upper is two-pronged as usual and partially 

 excavated into a muciferous tube. The portion below the knee is posteriorly dilated into 

 a broad, thin, and slightly convex lamella {cV). Although separated from the narrow 

 vertical part by a shallow groove, this lamella is in perfect continuity with the clavicle, 

 and, tliereforc, cannot be the coracoid bone, for which it might be taken. 



The cartilaginous lamella which intervenes between the clavicle and the pectoral fin 

 is broad and thin with four comi)aratively small ossifications. 



The lower ossification {co) represents the coracoid ; it is of an oval shape with a 

 notch in its upper margin. The scapula (sc) occupies the upper portion of the cartilage, 

 and surrounds the large vacuity which generally distinguishes this bone ; it bears the 

 long upper pectoral rays without any intervening basalia. A large space (ca) between 

 the three bones described remains cartilaginous ; but there are behind this cartilaginous 

 area two other fiat and thin bones (&', h") which may be taken either as basalia or as 

 detached portions of the coracoid and scapula. A vacuity is left between them, and 

 another between the lower and the coracoid. The lower pectoral rays are thus articulated 

 directly to the narrow cartilaginous border of the coracoid and some to the lower basale. 



The stomach terminates behind in a very short cfecal sac, its pyloric portion being 

 much shorter and narrower than the cardiac. Its walls are rather thick, and its mucous 

 membrane is deeply folded longitudinally. Pyloric appendages are absent. The com- 

 mencement of the intestine has a much greater circumference than the pyloric portion of 

 the stomach, and its interior is densely beset with long villi. The succeeding part of the 



