i66 Memoirs of the Indian Museum. [Voi,. II, 



The length of the head is 3^ in the total without the caudal fin. 

 The greatest height is one-sixth the length without the caudal fin. 

 The length of the eyes is a little less than the length of the snout. 

 There are 19 rays in the pectoral fins. 

 ■^ Sphe filaments composing the ventral fins are composed of two rays. 

 The male has a well-developed penis. 



Two specimens, a male and a female, both about five inches long. 

 Habitat, — Off the S.-B. coast of Arabia, 540 fathoms, Station 361. Registered 



Nos. 13 3^1-2 ^ 



Barathronus diaphanus, Brauer. 

 Wissen. Ergebn. Deiitsch. Tiefsee-Exped. '' Valdivia," Bd. xv, part i, p. 305 (1906). 



One specimen from Station 310, in the Andaman Sea, 960 fathoms. The " Val- 

 divia " obtained this species from the Indian Ocean near the Chagos group in 2,919 

 metres. Registered No. ^^■^^. 



Suborder Pediculati- 



Family LOPHIID^. 



Lophius triradiatus , sp. no v. 



Illustr. Zool. ''Investigator ,'' Fishes, plates xlv, figs. 5, 5a (1909). 



B. 6, D. iii 8, A. 7, C. 8, P. 15, V. i 5. 



The disk is elliptical, its length measured from the symphysis of the lower jaw 

 to the base of the pectoral fins is half the total with the caudal. The height of the 

 disk is half its length. The greatest breadth of the disk is rather more than half its 

 length. The margins of the disk are scantily fringed. The diameter of the eye is 

 equal to the interorbital space in the middle of its length and slightly less than the 

 snout. The interorbital space is twice as broad behind as it is in front. The first 

 two dorsal spines are on the snout : they are relatively small, the first, which is the 

 longer, being about a third the length of the disk \ it curves forward — it has been 

 shown as straight in the figure, but bears no tassel (? incomplete); the second is a 

 straight bristle, slightly shorter than the first. The third spine, which is about as long 

 as the second, but somewhat stouter than either of the others, arises from the central 

 and highest point of the disk. There is no trace of any other spines, subcutaneous 

 or otherwise, between this and the soft dorsal. 



The bony spines are relatively large, prominent and upright, two on each supra- 

 orbital margin, two behind each eye, a small pair on either side of the snout. The 

 humeral spine is feebly trifid. 



The pectoral fins are a fifth of the total length. The caudal is a third of the total. 

 The ventrals are nearly as long as the pectoral, but for two-thirds of the length they 

 are fastened down to the body by a triangular fold of skin. 



