6 
THE VOYAGE OF H.M.S. CHALLENGER. 
The following are the forms with which I am acquainted : — 
Stenorhynchus rostratus (Linne) = Cancer phalangium, Pennant, Stenorhynchus 
inermis, Heller. Seas of Europe; Mediterranean (to 40 fathoms, Heller); 
Shetlands (to 70 fathoms, Norman), &c.; Cape Verde Islands (to 38 fathoms, 
Studer). 
Stenorhynchus rostratus, var. spinulosus, Miers. Senegambia, Goree Island (9 to 1 5 
fathoms) ; coast of Portugal ; Ireland (20 fathoms). 
Stenorhynchus longirostris (Fabricius) — Leptopodia tenuirostris, Leach. Seas of 
Europe ; Mediterranean (to 420 fathoms, A. Milne Edwards). 
Stenorhynchus segyptius, Milne Edwards. Mediterranean ; South British Seas. 
Stenorhynchus czernjawskii, Brandt. Black Sea. (Perhaps not distinct from 
Stenorhynchus longirostris). 
Stenorhynchus falcifer, Stimpson. Cape of Good Hope (12 to 18 fathoms). 
Stenorhynchus spinifer, n. sp. St. Paul’s Pocks (10 to 80 fathoms). 1 
Stenorhynchus falcifer, Stimpson (PI. I. fig. 1). 
Stenorhynchus falcifer, Stimpson, Proc. Acad. Nat. Sci. Philad., p. 219, 1857. 
Two males and a female were dredged in Simon’s Bay, 5 to 18 fathoms, November 19, 
1873 ; where also the types of the species were collected. 
Carapace moderately convex, triangulate, with a straight or slightly concave 
posterior margin ; with a long median spine on the gastric region, in front of which are 
usually two smaller spines, the three forming a triangle ; a prominent median spine on 
the cardiac region and behind this usually a smaller intestinal spine or tubercle ; two 
small dorsal spines or tubercles on each branchial region ; a lateral spine on each hepatic 
and branchial region, and commonly a few small lateral spinules beneath these spines. 
Rostrum one-fourth to one-half the length of the carapace, composed of two straight 
slender contiguous spines, which are usually directed obliquely upwards. Post-abdomen 
in both sexes six -jointed, a median prominence on each segment, eyes of moderate length, 
a small distal tubercle on the upper surface of the cornese. Basal antennal joint slender, 
with a small distal spine (there is also usually a small tubercle near to its base on the 
epistome and another near to the antero-lateral angles of the buccal cavity, and 
a small postocular tubercle, which may represent the postocular spine), the antennal 
flagella are exposed and visible in a dorsal view at the sides of the rostrum. Chelipedes 
(in the adult male) about twice as long as the carapace ; merus with some small spines on 
its upper and lower margins and with a strong spine at the distal extremity of its upper 
1 As has been noted below, Stenorhynchus curvirostris, A. Milne Edwards, from Bass Strait, and Stenorhynchus 
f ssifrons, Haswell, from Port Jackson and New Zealand, may belong to the genus Achseopsis ; Stenorhynchus brevirostris, 
Haswell, is, 1 think, a species of Achseus. 
