1881.] THE SURVEV OF H. M.S. 'alert.' "n 



of the head ; the flagellum of the antennae is 7-jointed, the last two 

 joints being httle smaller than the preceding, and the terminal seg- 

 ment regularly rounded at its distal end. Dana's specimens were 

 obtained in the Antarctic seas south of Australia. 



Idotea argentea, Dana, which is apparently distinguished by its 

 colour and the form of the last two joints of the anteunee, is never- 

 theless very nearly allied to this species. 



Styloniscus magellanicus. 



Styloniscus magellanicus, Dana, U.S. Expl. Exp. xiv. Cr. ii. 

 p. /36, pi. xlviii. fig. 7 (1852). 



One example of this curious little land Isopod was obtained on 

 shore at Trinidad Channel, one at Port Henry, one from Cockle 

 Cove, and one from the midden-heap of a Fuegian hut in Tom Bay. 



LiRONECA NOV^-ZEALANDI.E. 



Lironeca nova-zealandice. White, List Cr. Brit. Mus. p. lOG 

 (1847) descript. nulla ; Miers, Ann. & Mag. Nat. Hist. (ser. 4) xvii. 

 p. 227 1876) ; id. Cat. New.-Zeal Crust, p. 10(i, pi. iii. fig. 2 

 (1876). 



A female specimen was found attached to the mouth of a fish in 

 Portland Bay, Straits of Magellan. Hence it is probable that this 

 species, like so many of the New-Zealand fauna, ranges throughout 

 the Antarctic region. 



L. noves-zealandice is nearly allied to L. lata, Dana, from the 

 Sandwich Islands, but is distinguished by its less prominent head, 

 which is more deeply encased in tiie first segment of the body, and 

 by the shorter rami of the uropoda, which are nearly equal in size to 

 one another, and more acute than in L. lata. 



iEcA PUNCTULATA, sp. n. (Plate VII. figs. 10-12.) 



Body convex, closely punctulated ; posterior margins of the seg- 

 ments of the thorax and of the postabdomen clothed with scattered 

 hairs. Head transverse ; the coxal joints or so-called epimera of 

 the second to sixth thoracic legs with the postero-Iateral angles 

 acute, but not prolonged backward, and with the margins slightly 

 hairy. Postabdominal segments (the terminal excepted) very short ; 

 terminal segment somewhat hairy, smooth and unarmed, narrowing 

 posteriorly, and rouuded at its distal extremity. Eyes (when viewed 

 from above) oblong, and extending along the lateral margins of the 

 head, but not along the anterior margin. Antennules short, reaching 

 to the postero-Iateral angles of the head, with the first and second 

 joints considerably dilated. Antennae short, scarcely reaching to 

 the postero-Iateral angles of the first thoracic segment ; flagellum 18 - 

 20-jointed. Penultimate joint of the first three pairs of thoracic limbs 

 without any process ; dactyli strongly curved and acute. Rami of 

 the uropoda unequal ; the inner largest at its distal end and trun- 

 cated, the outer narrow-ovate and rounded. Length about 1 inch 

 2 lines. 



