ADDENDA. 525 



the eye is one-fifth of that of the head, and less than that of the 

 snout. There are no spines above the snout ; the lower jaw projects 

 beyond the upper ; the maxillary does not extend to the anterior 

 margin of the orbit. The jaws, the vomer and the palatine bones 

 are armed with minute teeth ; there is a series of four pores along 

 the infraorbital bones. The gill-membranes are continuous under 

 the throat, and each of them has six branchiostegals. 



The breast is shielded by about sixteen hexagonal plates; that which 

 forms the base for the ventral fins is not much larger than the others. 

 The pectorals are rounded, shorter than the head, and composed of 

 ten simple rays ; the ventrals are situated entirely at the lower part 

 of the body, immediately behind the vertical from the root of the 

 pectoral ; they are small, and I cannot find a distinct spine. The 

 dorsal fin is triangular, higher than the body, situated behind the 

 middle of the total length ; its origin corresponds to the twentieth 

 scale of the lateral Une. The caudal fin is rounded, of moderate 

 length, composed of ten simple rays. The anal is similar to the 

 dorsal in form, and its origin faUs immediately before the vertical 

 from the first dorsal ray. 



The body and tail are shielded by as many series of plates as there 

 are longitudinal ridges, namely, the former by eight, and the latter 

 by six. 



The vent is situated in the middle, between the ventral fins. 

 The groimd-colour is black, obscurely marbled with greyish and 

 brownish ; dorsal fin greyish, marbled with black ; pectoral and 

 caudal black, with a greyish band across the middle ; anal yellowish, 

 with a black dot behind each ray. 



lines. 



Total length 32| 



Height of the body 2^ 



Greatest width of the body 3| 



Length of the head 64 



of the eye l|^ 



of the pectoral fin 4 



Page 224. Cephalacanthus spinarella. 



y. Half-grown. Presented by J. B. Godfrey, Esq. 

 Z-/3. Half-grown. Presented by J. B. Godfrey, Esq. 



Page 239. Percis cylindrica. 



Ti. Adult : stuffed. Aneiteum, From Mr. Macgillivray's Collection. — 

 This specimen differs somewhat from those formerly described. 

 It has fifty-eight transverse rows of scales, and the ventral fins 

 reach only to the third anal ray. 



Page 244. Sillago sihama. 

 q. Half-grown. Amoy (China). 



