458 Dr. A. Giinther on new Fishes from Zanzibar. 
the Scombroid group Cyttina. I am well aware that the 
young of numerous Scombroid and Carangoid fishes are pro- 
vided with an armature of the head which disappears with 
age, and I have but little doubt that the appeararice of this 
fish also is different in old individuals; but I do not think that 
the osseous plates behind the head disappear; and they will 
form the character by which the fish may be recognized at all 
ages. Having only a single example, 11 millims. in , 1 must 
omit the description of several characters, as the dentition, 
gills, &e. . 
Body compressed, suborbicular, the greatest depth being 
contained once and one-third in the length (without caudal) ; 
head enormous, the root of the ventral fin being consider- 
ably nearer to the base of the caudal than to the anterior 
profile of the head; eye very large, situated nearly in the 
middle of the depth of the head, and nearer to the end of the 
snout than to that of the operculum. Mouth extremely small, 
opposite to the lower part of the eye. The entire head is co- 
vered by bone; and several of the bones are much enlarged, so 
as to cover the anterior part of the trunk; there is an ovate 
suprascapulary plate covering the back below the first dorsal 
fin, and a humeral plate between it and the ventral. Both 
these plates are attached to the skin of the body in their basal 
portion only. The preopercular angle is much dilated and 
produced backwards into a very large subtriangular process, 
which is rounded behind, extending nearly to the anal. 
The remainder of the body is covered by scales, which are of 
moderate size and much deeper than long. 
_ There are two dorsal fins ; the first, composed of six <a 
(which are of moderate strength and short), is much less deve- 
loped than the second, which is formed by twenty-two rays. 
Anal fin corresponding in size and position to the soft dorsal, 
with twenty rays. Caudal subtruncated. Pectoral moderately 
developed. Ventrals thoracic, with one spine and five rays. 
Salarias Kirkii, 
Allied to Salarias tridactylus, 
D. 3%. A. 28. 
The height of the body is rather less than the length of the 
head, which is nearly one-seventh of the total length (without 
caudal). The single specimen obtained has a triangular crest 
on the head, tapering into a point ; a very small fringed tentacle 
above the orbit. The dorsal fin is slightly emarginate, the ~ 
anterior dorsal spines being as long as the posterior rays; the 
