10 
THE YOYAGE OF H.M.S. CHALLENGER 
fingers about as long as palm, and slightly incurved at the apices which are nearly 
destitute of hair ; the ambulatory legs are very slender and elongated ; the dactyli of 
the first three pairs are short and nearly straight, in the last pair only are they slightly 
falciform. Colour (in spirit), light yellowish-brown. 
Adult £ . 
Length of carapace to base of rostrum, 
Greatest breadth of carapace, about 
Length of a cbelipede, about 
Length of third ambulatory leg, about 
Lines. 
3 
H 
H 
13 
Millims. 
6-5 
5 
12 
28 
The description is wholly taken from an adult male, but applies also in nearly every 
particular to the adult female. 
Of Achseus tenuicollis a male and female were dredged off the entrance to Port Phillip, 
in 33 fathoms, lat. 38° 22' 30" S., long. 144° 36' 30" E. (Station 161); also an adult 
and smaller female, off East Moncoeur Island, Bass Straits, 38 fathoms, lat. 39° 10' 30" S., 
long. 146° 37" E. (Station 162). 
This species is apparently most nearly allied to Achseus lorina, Adams and White, 1 
from Mindanao, and to Achseus spinosus , Miers, 2 from the Japanese Seas ; and the three 
indeed may possibly prove to be varieties of one and the same form, but with the material 
at present available for comparison I have not ventured to unite them. From Achseus 
lorina, Achseus tenuicollis is distinguished by the more numerous spines of the carapace, 
and relatively shorter, though still elongated legs ; the specimens designated Achseus 
lorina in the British Museum collection are, I may add, apparently not those from which 
the species was described and figured. Achseus spinosus differs in the bilobated spine of 
the cardiac region, the much more strongly-developed chelipedes of the male, and the 
proportionately shorter ambulatory legs. 
Podochela, Stimpson. 
Podochela, Stimpson, Ann. Lyc. Nat. Hist. New York, vol. vii. p. 194, 1860. 
„ Miers, Journ. Linn. Soc. Lond. (Zool.), vol. xiv. p. 643, 1879. 
,, A. Milne Edwards, Crust, in Miss. Sci. au Mexique, pt. v. p. 189, 1879, and 
synonyma. 
Coryrhynchus, Kingsley, Proc. Acad. Nat. Sci. Pbilad., p. 384, 1879. 
The carapace is triangulate and somewhat depressed, with the gastric region prominent 
and narrow. Rostrum short and simple; either acute (subgenus Podochela) or hood- 
shaped and rounded at the distal extremity (subgenus Coryrhynchus). The post-abdomen 
(in the male) has the sixth and seventh segments coalescent. The eyes are non-retractile 
and project laterally. The basal antennal joint is narrow and longitudinally carinated, 
1 Zoology of H.M.S. “ Samarang,” Crust., p. 3, pi. xi. fig. 2. 1848. 2 Proc. Zool. Soc. Lond., p. 25, 1879. 
