BRACHYURA AND MACRURA OF HAWAIIAN ISLANDS. 
903 
3807; south coast of Oahu Island, surface, stations 3810, 3811, 3812, 3813, 3814, 3815, 3907, 3908, 3912, 
and 3921; south coast of Molokai Island, surface, stations 3821 and 3837; Pailolo Channel, surface, 
stations 3860, 3861, 3864, 3867, 3886, and 3901; south of Lanai Island, surface, 3880; north coast of 
Molokai Island, surface, station 3889; vicinity Laysan Island, surface, station 3932; between Honolulu 
and Laysan Island, surface, stations 3926 and 3930; vicinity of Kauai Island, surface, stations 3981 
and 4018; between Kauai Island and Oahu Island, surface, station 4009; west coast of Hawaii Island, 
surface, station 4037; north coast of Maui Island, surface, station 4086; Honolulu, March 30, 1902, 
surface; Honolulu market, May 8, 1902; Hanalei, Kauai, June 21, 1902, surface. 
Metapenaeus affinis (Milne Edwards). 
Penseus affinis Kingsley, Bull. Essex Inst., XIV, 1882, 105. 
Parapenseus affinis Rathhun, Proc. U. S. Nat. Mus., XXVI, 1902, 38, and synonymy. 
Hawaiian Islands (Kingsley). 
Metapenaeus velutinus (Dana). 
(PI. xx, fig. 5.) 
Penseus velutinus Dana, Crust. U. S. Expl. Exped., I, 604, 1852; atlas, pi. xl, fig. 4, 1855. Bate, 
Challenger Macrura, 253 (part), pi. xxxm, fig. 1 (probably not figs. 1" and V")', 1888. 
Distribution . — South coast of Molokai Island, 23 to 134 fathoms, stations 3845, 3846, 3847, 3848, 
3849, 3850, 3853, and 3855; Pailolo Channel, 122 to 143 fathoms, sta- 
tions 3857, 3858, 3859, 3897, 4101, and 4102; Auau Channel, 21 to 28 
fathoms, station 3874; vicinity of Laysan Island, 16 fathoms, station 
3962; vicinity of Kauai Island, 40 to 233 fathoms, stations 3982, 3987, 
and 4002; northeast coast of Hawaii Island, 63 to 107 fathoms, station 
4064; Aleunihana Channel, 176 to 49 fathoms, station 4066; north coast 
of Maui Island, 52 to 152 fathoms, stations 4071, 4077, and 4098., 
Dredged at Lahaina (Dana). 
Our specimens are all of medium to small size ( 58 mm. and under ) . 
Body pubescent. Rostrum reaching to middle of second anten- 
nular segment, with usually, seven spines and, some distance behind, 
a gastric spine, behind which there is no carina; gastric spine at a 
point three-elevenths or a little more than one-fourth from the orbit 
to posterior margin of carapace. Rostrum slightly ascending, straight above and convex below as is 
usual in the female, or convex above and straight below as is usual in the male. Hepatic spine in line 
with gastric spine and almost in a longitudinal line with antennal spine. 
Eyes very large, their greatest diameter just half as long as outer margin of acicle. This last 
three-fourths of length of carapace. Antennular flagella scarcely equaling last two joints of peduncle. 
Outer maxillipeds reaching just to end of acicle. Second pair of feet exceeding antennal peduncle 
by length of fingers; third pair exceeding second by length of chela. 
Basis and ischium of first pair each armed with distal spine; second pair unarmed. All the 
pereiopods are furnished with an exopod, while the last two pairs as well as the outer maxillipeds are 
destitute of an epipod. 
Second to sixth abdominal somites carinate, carina increasing in strength posteriorly. Telson 
falling short considerably of the inner uropod; armed on either side with three movable spines, which 
increase rapidly in size posteriorly, and a fixed spine which is next to the terminal spine and is inter- 
mediate in size between the first and second pairs. 
Petasma asymmetrical, the left branch longer and forming a hood which at the tip locks over the 
right branch; each branch with a small curved spine at extremity. 
Length of carapace of female (station 4102) 21; of abdomen 37 mm. 
Color, mottled with yellowish pink. 
This species has not the abdominal hump or angle shown in Dana’s figure, neither does the telson 
reach as near the end of the inner branch of the tail-fan as represented by Bate. 
Fig. bG.—Metapenseus velutinus. a, 
Petasma, station 3897, x 4f. 6, 
Thelycum, station 3859, x 3J. 
