536 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
List of stations. 
Albatross Depth | Bottom | Number 
station. | Locality. | in tempera- | of speci- 
| fathoms.| ture. mens. 
| Ae ie 
olOkChinatSea, vicinity of slonekonger. cece sss! eases eee eee 100 65.5 1 
5114 | China Sea and adjacent waters off southern Luzon...........- 14522 eee 1 
5115 | 340 re 
Or” bas OnsBS se ne ee eC ee. oN. a eet nac ad | or or | 1 
5116 | 200 50. 2 
OLL9 |S aa COS is peeled se ieb ng ot eee aoe eee ee eet eae aiafei= arin 394 43.7 1 
5282 |....- OF. See OEE Se eee ee Sa er: SES aor 248 | 47.4 7 
ood. |>Vicinityot- Maninduque Island st. 625: 2-2 eee ene ae ee 338 51.8 | 2 
9445 || “Bast coast of Laizon 22 22..05.. 555.0. 2. See a seer arg AF 383 44.3 1 
pol0-|' Vicinity of northern Mindanao 22 2. =) see deo cee wee te eee 423 53.0 | 1 
5586 || Vicinity of Sibuko' Bay, Bormeéon #2... =) se eee ess eee | 347 44.0 11 
SSS aoe COs sea cet Ae See one ee Me ae ee 415 42.3 1 
59589 |....- GOS Se eee Ps eee ee eS eee eee 260 45.7 28 
5622 | Between Gillolo and Makyan Islands..................--.---- OE seer 3 
56235 |eeaes Cao) are ede ta PN RRC Pgh io Sets i oe ark 7103 Reateeeneee | 1s 
56240 eee oe Ca Co ees Seep Re Se rs fey ne tad ee ER re Ne ae 288) \ ee seees 7 
WOStr'|ss 2.0. haemo eet oe teen Neate 25.5 + Se een ven ME eee oe la. <jn.a eet | Ove ee = 1 
| 
From the data presented above it seems probable that this species in- 
habits water averaging deeper and colder than any other Philippine 
species of the genus, with the probable exception of H. barbatulus. 
The record from near Hongkong is unusual, and possibly erroneous. 
The body is robust anteriorly, its greatest depth, below origin of 
first dorsal, being contained but 1.25 times in length of head; the 
paratypes, especially smaller ones, are more slender, the depth being 
contained from 1.35 to 1.5 times in head (2.0 times in H. gracilis). 
The lateral outlines of the head are strongly and evenly curved an- 
teriorly; the sides of the head posteriorly are subvertical on the mid- 
dle third, but are concave above and below. The width of the head 
is decidedly greater than its postorbital length. The snout projects 
horizontally forward from the vertical through front of premaxil- 
laries a distance half as long as the pupil; the snout is a little shorter 
than the interorbital, its length is contained 1.25 (1.1 to 1.4) times 
in the orbit, and 3.8 (3.7 to 4.1) times in the head. The orbit is of 
irregular outline; its oblique length, which is the greatest, is con- 
tained 1.4 (1.3 to 1.5) times in the postorbital, or 3.0 (2.9 to 3.8) times 
in the total, length of head. The middle of the length of the head is 
midway between the hind margins of the pupil and of the orbit 
(varying to each of these limits in the paratypes). The least width 
of the interorbital space, contained 3.35 (3.0 to 4.0) times in the head, 
lies above the front of the pupil, from which place the sides of the 
interorbital diverge widely posteriorly; the least suborbital width is 
about equal to the diameter of the pupil. The length of the long and 
slightly oblique upper jaw is contained 1.9 (1.8 to 1.9) times in the 
head. The teeth are minute, and occur in narrow bands along the 
jaws. No trace of a barbel is developed. The angle of the preoper- 
cular ridge is sharp, but scarcely produced backward; the crenulate 
margin of the preopercle is evenly rounded. In the degree to which 
