1877.] ON CRUSTACEANS FROM DUKE-OF-YORK ISLAND. 133 
5. Ona Collection of Crustacea made by the Rev. G. Brown, 
C.M.Z.S., on Duke-of-York Island. By Epwarp J. 
Minrs, F.L.S., F.Z.S., Assistant in the Zoological De- 
partment, British Museum. 
[Received February 19, 1877.] 
The Crustacea collected by Mr. Brown belong, with one exception 
(Lysiosquitla maculata), to the Decapoda, and amount in all to forty- 
four specimens, representing sixteen species. Although none of the 
species collected are new to science, several are interesting and little- 
known forms. I may particularly mention the Grapsodes notatus of 
Heller, originally described from specimens collected by the Novara 
Expedition at the Nicobars, and peculiar on account of the form of 
the carapace and structure of the orbital region; and the Sesarma 
ah of Hess, hitherto recorded only from Sydney, New South 
ales. 
I have added a description of a remarkable species of Sesarma 
(S, teniolata) in the British-Museum collection. The majority of 
the species collected by Mr. Brown are well-known forms, and gene- 
rally distributed throughout the Indo-Pacific region. 
ATERGATIS FLORIDUS. 
Cancer floridus, Linn. Syst. Nat. (ed. xii.) p. 1041 (1766). 
Cancer ocyroé, Herbst, Naturg. Krabben u. Krebse, iii. (part 2) 
p- 20, pl. liv. fig. 2 (1801); M.-Edw. Hist. Nat. Crust. i. p. 375 
(1834). 
Atergatis floridus, De Haan, Faun. Japon. Crust. (Dee. ii.) p. 46 
(1835); A. M.-Edw. Nouv. Archiv. Mus. Hist. Nat. i. p. 243 
(1865). 
One example, a female, of this very common and widely distributed 
Indo-Pacitic species is in the collection. 
CARPILIUS CONVEXUS. 
Cancer convexus, Forskal, Descript. Animalium &c., Insecta, 
p- 88 (1775). 
Carpilius convecus, M.-Edw. Hist. Nat. Crust. i. p. 382, pl. xvi. 
figs. 9 & 10 (1834); A. M.-Edw. Nouv. Archiy. Mus. Hist. Nat. i. 
p: 215 (1865). 
Two specimens, both females, are in the collection. This is also 
a very common species, and generally distributed thronghout the 
Indo-Pacific region. In C. convevus the abdomen of the male is 
6-, of the female 7-jointed; but in the males a small marginal 
fissure is usually to be observed on each side of the abdomen, mark- 
ing the line of coalescence of the third and fourth segments. In the 
females the right chela is usually very large and massive. 
