530 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
INTERGRADES BETWEEN HYMENOCEPHALUS STRIATISSIMUS STRIATISSIMUS AND H. S. TORVUS. 
List of stations. 
| 
- | Bottom | Number 
Albatross ofus Depth in | " F 
station. Locality. thors: | eee ues St Spes 
| cal 
5325.,| "Ort northernelazonsese 2 eae et oan ae ee 224 53.2 15 
Da26 tl sos SOS ee eet oe eee a ae ee ee els Ae eee 230 55.4 3 
SByss) |e eee (6 (0 Ata <a a OSD TERS tee eM Dh Cand oe a 8 150 53.9 1 
5320.15 tcl ie sete te Ciel ne etd Ram te DLA ae, 5 BIE 212 51.4 4 
bdo lap OTt Western WWz0On- ae ae se ceo Cay 22 SR Ca en Oa eee 178 54.7 1 
5440 |....- CO st Sih = Sate ieee wea Fog ee ee oe Ae es ae a3 172 53. 2 1 
The status of these 23 specimens and their relation to the two 
subspecies occurring on each side of their range have already re- 
ceived consideration. They resemble HZ. s. forvus in the small, ob- 
liquely elofigate orbit, and in the short barbel, but usually agree with 
H. s. striatissimus in the number of ventral rays: 21 specimens have 
8 on each side, and 2 have 8 on one side and 7 on the other. Over 
70 fins have been counted in striatissimus-and none were found with 
7 rays; 306 fins counted in H. torvus include none with 8. 
49. HYMENOCEPHALUS STRIATISSIMUS TORVUS Smith and Radcliffe. 
Hymenocephalus torvus SMiTH and RaApcCLIFFE, Proc. U. S. Nat. Mus., vol. 
43, 1912, p. 110, pl. 32, fig. 2. 
The type-specimen was stated, in the original description, to have 
been dredged at station 5548, near Jolo. This statement is erro- 
neous, as the specimen was dredged at Albatross station 5508, off 
northern Mindanao, at a depth of 270 fathoms. 
The lateral line is on the fourth row of scales below end of first 
dorsal (not the sixth, as originally described). The scales are thin 
and deciduous, as usual in the genus; they are weakly armed with 
small spinules in quincunx order. The abdominal region, which is 
striated exactly as in typical striatissimus, is completely covered by 
. spineless scales, as in the two other subspecies. 
The roof of the buccal cavity is mostly silvery, but dusky just 
within the mouth and whitish on the tongue. The branchial cavity 
is brownish above, but mostly silvery below and whitish along the 
margin of the opercular and branchiostegal membranes. The par- 
ietal peritoneum is brownish, underlain with silvery. 
The orbit is smaller in this subspecies than in typical striatissimus, 
and is not circular, as originally described; its vertical height is con- 
tained about 1.2 times in the oblique length, which is contained from 
1.1 to 1.4 times in postorbital length of head (measured in 100 
specimens). 
