R. E. Ei<oyd : Deep-Sea Fish caught by the “Investigator.'' 
1909.] 
169 
breadth of the disk. The snout projects beyond the mouth, though, to a somewhat 
less extent than in D. nasutus. The nasal tentacle, however, is exactly as in that 
species ; it ‘ ‘ ends in a pair of fleshy balls with a pair of filaments above and between 
them.” 
The diameter of the eye is about ith of the length of the disk. The eyes are 
rather more than a diameter apart. The caudal and pectoral fins are about equal in 
length and are one-fifth of the total length. 
Up to this point the description is almost the same as that of D. nasutus. The 
only difference is in the dermal armature. The upper surface is covered with sharp 
spines on a stellate base. They are larger and less numerous that in D. nasutus. 
The ventral surface of the tail and disk is covered with smooth skin entirely devoid 
of spines except for three minute spines near the bases of the pelvic fins. 
Colour dark grey. One specimen, 75 mm. in length, from the Bay of Bengal, off 
Arakan, 1,100 fathoms. Station 326. Registered No. 
Malthopsis triangularis , sp. nov. 
Illustr. Zool. “Investigator Fishes, plate xlv, figs, i, la (1909). 
B. 5, D. 5, V. 2-3, C. 9. 
The greatest breadth measured between the subopercular spines is slightly less 
than the greatest length excluding the caudal fin (proportion 9 to 10). The antero- 
lateral borders of the disk are straight and together form a right angle. The nasal 
spine is nearly vertical and is slightly more than half the diameter of the eye in 
length. The caudal and pectoral fins are of the same length and are longer than the 
pelvic fins in the proportion of 3 to 2. The caudal fin is slightly less than a fifth of the 
total length. There are seven large ossicles between the base of the ventral fins and 
the vent. One of these is large and central and is surrounded by the six others which 
are in contact with it. There is a pair of plates between the bases of the pelvic fins 
and five plates in front of them. The upper surface is covered with stellate ossicles 
except on either side of the middle line where there is an area of naked skin. This is 
bounded externally by an oblique row of ossicles which converge in the direction of 
the root of the tail. The subopercular spines are as large as the nasal spine and bear 
four transparent spinelets. 
There are two gills ; teeth are present on the vomer and palatines as in other 
species of the genus. 
Two specimens from 279 fathoms in the Andaman Sea, Station 332. Registered 
Nos.iV-S -¥-• 
Family ANTENNARIIDÆ. 
Chaunax apus, sp. nov. 
Illustr. Zool. “ Investigator Fishes, plate xlv, fig. 6 (1909). 
Resembling Chaunax pictus (Lowe) in every respect except that the pelvic fins 
and the nasal tentacle are represented by minute rudiments. Colour as in C. pictus. 
