148 " ENDEAVOUR " SCIENTIFIC RESULTS. 



INSIDIATOR DIVKKSIDKXS, sp. nov. 

 (Plate xxxi., fig. 1 ; Fig. 13.) 



Br. 7 : D. i.vii. i-ii., 11: A. 12 : P. 18-19 ; V. i. 5 ; C, 12-13 ; 

 h. lat. 52-53. Head 2.52-2.70 in the length to the hypural. Eye 

 4.04-4.78 in the head, and 1.21-1.52 in the snout, which is 

 3.03-3.33 in the head. Interorbital width 2.71-4.2 in the eye. 

 Third dorsal spine 2.65-2.75, breadth before the pectorals 

 1.83-2.02, and depth 3.38-4.04 in the head. 



The ridges of the head are strong and a little denticulated, 

 and terminate in strong spines. A strong anterior orbital 

 spine ; hinder half or two-thirds of the supraorbital ridge with 

 about ten strong denticles. Interorbital space concave. Two 

 postocular spines on each side, from the inner of which a series 

 of prominent, radiating ridges extends backward. A small 

 median and two medio-lateral ridges on the cranium, each of 

 the latter armed with a strong spine. Between the outer 

 postocular spine and that above the articulation of the preopercle, 

 are several minute denticles, and there is another lai'ge spine 

 before the suprascapnlar one. Ridges on anterior portion of 

 snout minutely serrated. Bony stay of cheek arising in a 

 star-shaped cluster of ridges on the preorbital ; it is rather 

 coarsely serrated along its whole length, and there are two or 

 three spines, the first on the preorbital, the second before the 

 middle of the eye, and the third before the posterior orbital 

 margin. Preoperculuni armed with two spines, the upper much 

 the longer, its length considerably more than the width of the 

 iuterorbital space ; a third smaller spine springs from its upper 

 surface near the base. Opercular ridges smooth, terminating in 

 spines. 



Fig. 13. Insidiator diversidens. Head and teeth. 



Anterior nostril with a short tentacle, the postei-ior tubular. 

 No supraocular tentacle, and no skinny lobe on the lower border 

 of the operculum. Teeth larger than usual in the genus. They 

 are arranged in a band on the upper jaw which is narrow on the 

 sides and broader anteriorly ; the inner ones are larger than the 

 outer, and those near the syniphysis are elongate and cardiform. 

 They are smaller on the lower jaw, and are arranged in two 



