40 
THE VOYAGE OF H.M.S. CHALLENGER 
Adult $. 
Lines. 
Millims. 
Length of carapace and rostrum, .... 
n 
16 
Breadth of carapace to base of lateral branchial spines, 
5 
10-5 
Length of a chelipede, about ..... 
12 
Length of first ambulatory leg, . 
n 
16 
Pugettia, Dana. - 
Pugettia, Dana, Amer. Journ. Sci. and Arts, ser. 2, vol. xi, p. 268, 1851. 
„ U.S. Explor. Exped., Crust., vol. xiii. p. 84, 1852. 
„ Miers, Journ. Linn. Soc. Lond. (Zool.), vol. xiv. p. 650, 1879, and synonym. 
This genus is very closely allied to Acanthonyx, and it may suffice to indicate the 
distinctive characters, which are as follows : — 
The carapace is usually more convex and tuberculated than in Acanthonyx, and the 
lateral branchial lobes as well as the antero-lateral lobes are large, prominent, and acute, 
and separated by a concave interspace. The post-abdomen (in the male) is seven- 
jointed. The penultimate joints of the ambulatory legs are subcylindrical, without the 
prominent posterior lobe or tooth which characterises Acanthonyx. 
Of the species of this genus, two, Pugettia gracilis, Dana, and Pugettia richii, Dana, 
inhabit the Californian coast, the former extending its range northward to Esquimalt 
Harbour, British Columbia (whence it has been recorded by Mr. Spence Bate as Pugettia 
lordi). Two species, Pugettia quadridens (De Haan) and Pugettia incisa (De Haan), 
inhabit the seas of Japan. 
I have noted the occurrence of a female of this genus, doubtfully distinct from the 
Californian species (Pugettia australis, sp. V) from Rio de la Plata, in 28 fathoms. 
None of the above species have, I believe, been recorded from very deep water ; I 
have, however, noted the occurrence of Pugettia incisa (De Haan) in the Corean Seas, at 
a depth of 36 fathoms. 
The very distinct species described below, Pugettia velutina, was dredged off the Ki 
Islands in 140 fathoms. 1 
Pugettia incisa (De Haan). 
Mensethius incisus, De Haan, Crust, in v. Siebold, Fauna Japonica, p. 98, pi. xxiv. fig. 3, J 
( Halmius ), and pi. G., 1839. 
Pugettia incisa, Stimpson, Proc. Acad. Nat. Sci. Philad., p. 219, 1857. 
„ „ Miers, Proc. Zool. Soc. Lond., p. 23, 1879. 
Two adult males were collected off Yokoska, Japan, in 10 fathoms. In these 
specimens the lateral (postocular) expansions of the carapace have the anterior and 
The genus Peltina, Dana, is probably synonymous with Pugettia ; of the recorded species, one, Pugettia scuti- 
formis, Dana, from Rio de Janeiro, was probably founded on an immature type ; the other, Pugettia nodulosa, Dana, 
inhabits the Fiji Islands (Vanua Levu), and presents all the characters of Pugettia. 
