412 DEEP-S^ FISHES OF THE ATLANTIC BASIN. 



We i)rott>st agiiiiisfc tlie action of English iclitliyologists in changing the form of the 

 generic name. It is j)roperly and legitimately formed from \r,h,o^ (a thoug), and >,tii)a (tail). 



Ghaiimira fcrnmidezianns, Giinther (Challenger Eeport, xxii. 14r),(pl. xxxviii, fig. B) 

 was obtained by tlie ChaUcni/rr at station 300, sonth of Juan Ferimndez, in 1,375 fathoms. 



('Iidlinnra Jioccpliala., Giinther {loe. cit., 145, pi. xxxviii, tig. A) was taken by the 

 Challcvffer off Japan, in 1,875 fathoms, and in mid Pacific in 2,0.50 fatlioms. 



Chdliniira Murrayi, Giinther [loc. cit., 140, pi. xxxiv, fig. A) was taken by the (Uudleiif/er 

 off New Zealand in 1,100 fathoms. 



Chitlinura serrtda, Bean (Proc. IT. S. Nat. Mus., xiii (No. 795), 37) was taken by the 

 Alhiitross east of Prince of AVales Island, in 1,500 fathoms. 



Cli((liiiura Iiis2)i(l((, Alcock, from the Bay of Bengal, i'20-240 fathoms (Ann. Mag. Nat. 

 Hist., 1889, Nov., 397). 



CHALINURA SIMULA, Gooi>k and Bean. (Figure 345 ) 



Chaliuura Simula, Goode and Bean, Bull. Mus. Comp. ZoJil., x, 109. 

 Macrurus nimidii.i, Gi'TNTHER, Challenger Report, xxu, 1887, 143. 



The most salient characters are (1) the very large month, (li) the long obtuse snout, and 

 (3) the very elongate first ventral ray. 



The body is shaped mucli as in Gorypluvnoulfs, \nit is rather stout, its greatest height 

 being contained 6 times in its total length. The back is somewhat gibbous in i)rotile, the 

 dorsal outline rising quite rapidly from the interorbital region to the origin of the first 

 dorsal, whence it descends almost in a .straight line to the end of the tail. 



The scales are rather small, but with indications, particnjarly on the head, of radiating 

 striie. The number of scales in the lateral line is about 1 50 ; about 8 rows between the origin 

 of the dorsal and the lateral line, and 17 to 19 between that line and the origin of the anal. 



Tlie length of the head is contained about o times in the total length of the body. The 

 width of the interorbital area is much greater than the long diameter of the orbit, which is 

 nearly twice that of the snout. The postorbital portion of the head is about three times as 

 long as the diameter of the eye. The length of the operculum is equal to half that of the 

 upper jaw. The preoperculum is emarginate on its posterior limb. The orbit is nearly 

 round, its diameter contained times in the length of the head. The snout is broad, obtuse, 

 scarcely projecting beyond the mouth; its width nearly as great at the tip as that of the 

 interorbital space or as its own length. The median ridge is very ])i'ominent, gibbous in 

 outline when observed laterally; the lateral ridges start out almost at a right angle with 

 the median ridge, and are not continued upon the sides of the head. The suborbitals i)rom- 

 inent, forming broad subocular ridges. No supraorbital ridges. Nostrils in front of the 

 middle of the eye, and nearer to its anterior margin than to the tip of the snout. Barbel 

 longer than the diameter of the eye. 



Teeth in the ujiper jaw in a broad villiform band, with the outer series very much 

 enlarged. The lower jaw with the teeth in a single series. 



Distance of first dorsal from snout 4J times the length of its base, its distance from the 

 anterior margin of the orbit about equal to the length of the head. First sjiine very short, 

 seiiond rather stout and with a simple serration anteriorly, the seme closely appressed 

 to the spine; its length two-thirds that of head. 



The second dorsal begins at a distance from the first about equal to the lengtli of the 

 upper jaw. 



The anal is high, its average rays being about three times as long as those in the 

 dorsal. It is inserted .slightly behind th<^ perpendicular from the last ray of the first 

 dorsal. The pectoral is inserted over the base of the ventral (its rays are mutilated). The 

 ventral is inserted almost under the pectoral, but very slightly in advance; its distance 

 from the snout is less than the length of its longest ray, which is jirolouged in a filament 

 which extends to the base of the eighteenth ray of the anal fin. 



