132 H. J. HANSEN. 
its anterior part is broad, cut off transversely, and protrudes 
as a narrow transverse band in front of the head. The two 
proximal joints of the antennule somewhat depressed, oblong, 
with the margins sub-parallel ; third joint slender, as long as 
the first; flagellum five-jomted. Uropods about as in C. 
lunifrons (compare Miss Richardson’s figure). The single 
male seen is adult, a little smaller than the female, but the 
uropods are proportionately a little broader. In both sexes 
the end of abdomen is cut off transversely. 
(9) Leptospheroma (Hilgendorf).—The type is L. 
Gottschei (Hilg.), of which I received three typical speci- 
mens from the Berlin Museum. No other species referable to 
this interesting genus has been described, but I have seen 
specimens of a new, very small form from Singapore. The 
genus shows in aspect a certain similarity to Plakarthrium 
(Chilt.), but the agreement is, however, only superficial, which 
is easily seen by a perusal of the diagnoses of the sub-families 
Spheromine and Plakarthrine. 
(10) Ancinus (M.—Edw.).—The type is A. depressus 
(Say), referred by Say to the genus Nesa (Leach). The 
British Museum possesses a single exsiccated specimen pre- 
sented by Thomas Say; in 1902 I examined its external 
structure. The figures (Pl. XXXII, figs. 17-20) in H. Milne- 
Edwards’ ‘ Hist. Nat. Crust.? convey a rather good idea of 
the outline of the animal and of the shape of the hands of 
first and second legs of the male. The specimen named seems 
to be the only one existing in any zoological Museum ; at least, 
I have asked for material of this form in Paris and in American 
Museums, but with negative result. No other species is known. 
(11) Ancinella (n. gen.).—This interesting genus I estab- 
lish on a new species, A. profunda (n.sp.), of which a large 
number of specimens were found in bottom material secured 
by Dr. Joh. Schmidt in 1904 during the cruise of “ Thor,” 
the Danish ship in the service of the International Commission 
for marine investigations. The locality is lat. 61° 15’ N., long. 
9° 35’ W., 900 meter. As supplement to the diagnosis of the 
genus a short description of the species may be inserted here. 
