972 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
3799, surface, Erben Bank to Kaiwi Chaim., 29° 22 / N., 139° 31 / W., 2 females; 3801, 100 fathoms, ; jj 
Erben Bank to Kaiwi Chann., 28° 3U N., 141° 47 / W., 2 males, 1 female; 3802, 150 fathoms, Erben 
Bank to Kaiwi Chann., 27° 04 / 15" N., 144° 18' 30" W., 1 male; 3829, surface, south coast of Molokai, J jj] 
1 female; 3867, . surface, Pailolo Channel, 2 males, 5 females; 3889, surface, north coast of Molokai, | 
2 males; 3912, surface, south coast of Oahu, 1 male, 2 females; 3926, surface, between Honolulu and j 
Laysan, 21° 13/ N., 158° 43' W., 2 males; 3927, surface, between Honolulu and Laysan, 21° 31 / N., 161° j 
55 / W. , 6 males, 8 females; 3929, surface, between Honolulu and Laysan, 23° 19' N., 166° 54' W. , 3 males; 
3930, surface, between Honolulu and Laysan, 25° 07' N., 170° 50' W., 6 males, 1 female; 3980, surface, : 1 
between Honolulu and Kauai, 21° 33 / N., 158° 19 / W., 1 male; 4011, surface, between Kauai and Oahu, 
21° 20 / N., 158° 21 / W., 1 male, 1 female; 4086, surface, northeast coast of Maui, 1 male, 2 females; 1 
4145, surface, between Kauai and Modu Manu, 22° 27' 30" N., 160° 40 A W-., about 100 males, 30" females, f ’ 
Distribution. — North, Tropical, and South Atlantic; North and South Pacific; Australian seas; 
Indian Ocean; apparently generally distributed in the tropical and subtropical parts of all oceans, on 
the surface. Our stations 3801 and 3802 are remarkable, because they record this species from the 1 
depth of 100 and 150 fathoms (two open intermediate tow nets, set tandem) . 
20. Siriella gracilis Dana. 
Siriella gracilis, Streets, Bull. U. S. Nat. Mus. I, 1877, No. 7, 123; G. O: Sars, Rep. Voy. Challenger, I j 
13, 209, pi. 36, f. 25-28, 1885. Ortmann, Bull. Mus. Harvard, 25, 1894, 107. Thompson, Catal. 
Crust. Pycnog. Mus. Dundee, 24, 1901. 
It is interesting to note that at station 4009 a large number of this species was captured, without j 
Siriella thompsoni, with which it was found associated at the other stations. 
Stations. — 3867, surface, Pailolo Channel, 4 males; 4009, surface, between Kauai and Oahu, j 
21° 50' 30" N., 159° 15 / W., about 35 specimens, male, female, and young; 4086, surface, northeast 
coast of Maui, 2 males, 2 females; 4145, surface, between Kauai and Modu Manu, 22° 27' 30" N., I 
16° 40 / YV., 13 males. 
Distribution. — Pacific (Dana); West, North, and Tropical Pacific (Sars); North Pacific, 20°-30° N., I 
145°-149° W. (Streets); near Galapagos Islands and between Galapagos and Acapulco (Ortmann); £ 
Bay of Bengal (Thompson). Surface. 
This species seems to be restricted to the tropical and subtropical parts of the Indian and Pacific |! 
Oceans. It has not been recorded from the Atlantic Ocean. 
Genus ANCHIALUS Kroyer. 
21. Anchialus typicus Kroyer. 
Anchialus typicus, G. O. Sars, Rep. Voy. Challenger, 13, 193 pi. 34 f. 4-27, 1885. 
The very remarkable new localities at which our material was secured have made necessary a very | 
careful comparison with Sars’s descriptions and figures (all parts are figured by Sars, except the first * 
maxilla), and I am unable to discover any differences from the characters given by him (p. 193) as 
“specific,” with the exception that he says that the apical incision of the telson occupies “one seventh 
of the length” of the telson, while in our specimens it occupies between one-fifth and one-sixth. 
This, however, is clearly due to a mistake on the part of Sars on page 193, since on page 196 he says 2 
that the incision occupies “about one-fifth” of the length, the correctness of which is further 
substantiated by the figure of the telson (pi. 34, fig. 26). 
Going carefully over Sars’s “description” of this species, I discovered only the following points 
which deviate in our specimens: 
(1) The male gnathopod has, according to Sars, a strong triangular expansion on the inner edge 
of the carpal joint, which, according to the figure (pi. 34, fig. 17), is almost spiniforin. In my slides j 
this expansion is present, but less spiniform. 
(2) I can not discover in my slides the peculiar structure of the outer branch of the fourth pair ol j 
male pleopods, described by Sars, and figured in figs. 24 and 25 on pi. 34. In my slides this branch is . 
“somewhat more produced,” but has no peculiarities in the shape of the joints and arrangment of 
natatory setae. 
(3) The palp of the mandibles is more elongate in. my specimens; the first joint is less wide, 
comparatively, and the second is much longer than represented in Sars’s fig. 12; it is not ovate, but 
rather linear. 
