90 DEEP SEA FISHES. 



process and spines well developed. Gills two, none on first and fourth 

 arches. 



Type H. iumifrons. 



In the diagnosis of Halieuttea, C. V., 1837, Hist. Poiss., XII., 457, 

 Valenciennes does not mention the number of gills in the type species, 

 H. stellata Wahl, 1797. Giinther, 1861, Cat., Ill, 205, had a number of 

 specimens and on dissection found " gills two and a half, the anterior 

 arcus branchialis not having any laminic." Goode and Bean, 1896, also 

 Jordan and Evermann, 1898, concur in attributing two and a half gills 

 to the genus. It is evident that the dibranchiate species described here- 

 with, though closely allied must be provided for elsewhere than in 

 the genus founded by Cuvier, whence the reason for the existence of 

 Halieutopsis. At various times Alcock has descri])ed species of Hali- 

 eutfea from the Andaman Sea and the Bay of Bengal ; as he does not 

 indicate the number of gills, it may be that some of them belong to the 

 dibranchiates. 



Halieutopsis tumifrons sp. n. 



Plate XX r. 



Br. r. 6 ; D. 6-5 ; A. 4 ; V. 6 : P. 14 ; C. 9. 



Halieidojisis tumifrons is more slender, longer in the caudal portion, 

 has a smaller eye, and has the dorsal situated farther from the disk 

 than is the case with Ilalieutcea sieUata Wahl. The outlines of disk are 

 subcircular, indented at the snout, and the edges on the suboperculum 

 and forward are considerably swollen, especially so below the eyes. Body 

 and head united in a much depressed subcircular or subquadrangular 

 disk, of less than half of the entire length, as broad as long, notched in 

 front of the mouth, with less curvature at the sides, deepest below the 

 orbits and gradually lessening in depth backward, thick and rounded 

 on the edge from the mouth to the subopercular process, and grooved 

 from the suborbital region backward to the middle of the disk. Head 

 higher at the snout, slightly concave in front of the interorbital space, 

 flattened backward, with a deep indentation below the rostrum at the 

 jaws. Snout prominent, but not extending farther forward than the 

 edges of the disk above the angles of the mouth, bluntly rounded in 

 front, deeply excavated below the rostrum to permit retraction of the 

 trilobed protractile illicium between the orbits, and with a wide deep 



