69 



The interorbital space, the breadth of which is equal to the major diameter 

 of the orbit, is deeply concave, and is traversed fore and aft by a deep median 

 "groove. Eacli supra-orbital margin is Surmounted posteriorly by a strono- 

 recurved spine, and there is a similar spine on each side of the occiput. 



The body-shields are in four rows on each side : each shield is strongly 

 Ciirinated, the carina being produced behind into a strong spine ; and in the case 

 of the shields of the posterior third of the lateral line the carin^e are slightly 

 produced and pointed in front also. 



The length of the anterior ventral shields is more than twice their o-reatest 



breadth. 



tn' 



Colours in spirit : body flesh-coloured ; the pectorals with a broad jet-black 

 band in their posterior half and with a milk-white tip ; the spinous dorsal black 

 in its upper half, and the soft dorsal with a black edge. 



Length 3^ inches. 



Off Colombo, li'2 to 400 fathoms. One specimen. 

 Regd. No. 13469. 



Named after Captain A. R. S. Anderson, I.M.S., Surgeon-Natm^alist to the 

 Marine Survey of India from 1893 to 1899. 



50. Peristetlilum, serrnlafurn, Alcock. 



Peristethus serrulatum, Alcock, Ann. Mag. N:.t. Hist., August 1898, p. 153: Illustrations of the Zoolouy op 



THE IiNVESTIGATllR, FiSHES, PL XXV. FIGS. 2, 2u. 



B. 7. D. VII. 22. A. 21. L. lat. 33. 



The length of the narrow spathulate preorbital processes is equal to more 

 than two-thirds the distance between their base and the anterior border of the 

 orbit. 



Pre-opercular ridge sharply serrulate, ending in a curved rather narrow 

 spine, which is nearly as long as the eye. All the bony ridges of the head are 

 finely serrulate or serrate ; in addition there are, on either side, a preorbital, a 

 post-orbital, an occipital, a post-temporal and an opercular spine, and on the 

 f(5rehead there are at least five small spines. 



Interorbital space concave, less than the major (h'ameter of the eye. 



The large labial tentacles, whcMi laid back, reach to the after limit of tlie 

 orl)it. 



All the shields of the body carry a stout recurved spine— eight rows in all ; 

 those of the posterior third of the lateral Hne are not simple spines, but are 

 acutely produced both forwards and backwards. The anterior ventral ]ilates 



