144 "ENDEAVOUR" SCIENTIFIC RESULT.-. 



INSIDIATOI; JUGOSUS. up. nov. 

 (Plate xxx., tig. 2; Fig. 11.) 



D. viii-ix. 11-12; A. 11-12; P. 21-22; V. i. 5; C, 12-13: 

 L. lat. 52-53. Head, from tip of snout to end of opercular flap, 

 2.54-2.62 iu the length to the hypural. Breadth of body 

 1.72-1.95, depth 2.55-2.97 in the head. Eye 4-4.57 in the head, 

 and 1.21-1.42 iu the snout, which is 3.25-3.42 in the head. 

 Interorbital space 2.88-3 in the eye. Third dorsal spine 2.82-2.4, 

 second dorsal ray 2.46-2.78, caudal fin 1.7-1.94, longest pectoral 

 ray 2.12-2.40, fourth ventral ray 1.42-1.56, and tenth anal ray 

 3.36-3.82 in the head. Caudal peduncle 1.5-1.73 in the eye. 



Head rough, with some small spines on the upper parts, and 

 all the exposed ridges finely denticulated. A strong spine, 

 surrounded by several smaller ones on the antero-superior mar- 

 gin of each orbit ; supraocular margin elevated, consisting of a 

 single row of denticles anteriorly and several rows behind. 

 Interorbital space deeply concave. Preorbital with a radiating 

 series of denticulated ridges, from which the infraorbital 

 series extends backwards to the preoperculuni which bears 

 a slightly enlarged spine below the hinder margin of the 

 eye. Preoperculum with two, sometimes three spines, the 

 upper one the larger though its length is less than the width of 

 the interorbital space ; no autrorse spine on the lower surface. 

 Operculum with two strong spines, the lower terminating an 

 oblique denticulated ridge. Cranium with a series of three or 

 four ridges diverging backwards from the base of a small spine 

 behind the eye on each side ; besides these there are several 

 other spines and ridges, the arrangement of which can be seen 

 in the figure. 



Fig. 11. Insidiafor jiigosus. 



Anterior nostril with a short tentacle, posterior nostril tubular : 

 no supraocular tentacle. Opercular membrane with a large 

 tongue-like lobe below the preopercular spines. Teeth minute, 

 closely set in a broad band on the upper jaw, with some larger 

 inner ones near the symphysis. On the lower jaw they are 



