172 Transactions.— Zoology. 
BRACHYURA. 
Genus Hymenicus, Dana. 
(Miers’ Cat. N.Z. Crustacea, p. 50.) 
Hymenicus marmoratus, sp. nov. Plate VILL, Be.1. 
Carapace smooth, naked and flat; sub-triangular with the sides arched, 
about as broad as long; front projecting and trilobate. Antero-lateral 
margin with two teeth, the posterior one sharp, long, and very distinct, 
the anterior one short and blunt. Abdomen of male sub-triangular, first 
segment broadest and more or less rectangular, penultimate segment 
narrower than the preceding, the last segment sub-triangular, rounded at 
the apex. Anterior legs rather large and swollen; tarsi of the remaining 
legs somewhat densely haired, the other joints being sparsely haired. 
Colour—variously marked with white and reddish-brown. Length ‘25in. 
Hab. Common amongst sea-weed in rock-pools in Lyttelton Harbour. 
Though common at Lyttelton Harbour this crab does not appear to 
have been hitherto described. It is closely allied to Hymenicus varius, but 
differs in the shape of the carapace, in having the two teeth on the antero- 
lateral margin well marked, and also in colour. 
Genus Elamena, M.—Edwards. 
(Miers’ Cat. N.Z. Crustacea, page 52). 
Elamena (?) lacustris, sp. nov, 
Carapace nearly circular, rather broader than long. Rostrum broad, 
strongly depressed, concave above, sides parallel, obtusely pointed at the 
end. Antero-lateral margin of the carapace with two nearly obsolete teeth. 
Last pair of legs much shorter than the preceding. Colour (in spirit)— 
carapace brown, legs yellowish, spotted with brown. Breadth :15in. 
Hab. Lake Pupuke ( fresh water), North Shore, Auckland. 
This species is remarkable from the fact that it is an inhabitant of fresh 
water. 
Iam somewhat doubtful about referring it to Elamena, as I have only 
seen a single specimen, a female. 
Professor Hutton kindly handed over this and the preceding species . 
me for description. 
Types of both have been lodged in the Canterbury Museum. 
ISOPODA., 
Genus Anthura, Leach, 
(Bate’s and Westwood’s Brit. Sessile-eyed Crust., vol. ii., p. 157.) 
Anthura (?) flagellata, sp. nov, Plate VIUL,, fig. 2. 
Body long, slender, sub-eylindrieal, thoracic segments sub-equal. Ante 
near equal, the inner one with a distinct flagellum. First three palt® 
thoracie legs sub-chelate, the first pair being considerably larger than th? 
