35 Crust. 
OKUSTACEA. 
poda represented by branchiae, third pair feebly developed, two posterior 
pairs well developed, equal. First and second pairs of pleopoda rudi- 
mentary in the male, the rest obsolete. (7. novce-zealandice^ sp. n., New 
Zealand. Thomson, 1. c. p. 247, pi. x. fig. d 6. 
ISOPODA. 
Tanaid^. 
Tanais islandicus, Reikiavik, Iceland, and veringi, Northern Sea, 63^^ 
N. lat. 4*^ E. long., 417 fath., spp. nn., G. O. Sars, Arch. Math. Naturv. 
1876, pp. 346 & 347. 
Paratanais algicola, limicola^ and cceca, spp. nn., Harger, Am. J. Sc. 
(3) XV. pp. 377-379, New England. 
Apseudea cceca^ sp. n., Willem oes-Suhm, Tr. L. S. (2) i. pp. 23 & 24, 
pi. xii. figs. 1-9, Azores, 1000 fath. 
Anthueid^. 
Paranthura arctica^ sp. n., Heller, Denk. Ak. Wien, xxxv. p. 38, pi. iv. 
figs. 9-12, Arctic Sea. 
Ptilanthura, g. n. Flagellum of antennulae multi-articulate, with dense 
whorls of fine slender hairs, interrupted on the inner side. Eyes distinct. 
Pleon imperfectly segmented, elongate. Maxillipeds two-jointed. P. 
tenuis, sp. n., Noauk Harbour, Connecticut, and Casco Bay, Maine. 
Harger, Am. J. Sc. (3) xv. p. 377. 
Peanizidj}. 
Anceus stygius and hirsutus, spp. nn., G. O. Sars, Arch. Math. Naturv. 
1876, pp. 348 & 349, Northern Sea, 63-65® N. lat., 4® E.-7® W. long., 
400-1200 fath. 
iDOTEIDiE. 
Idotea sabini (Kroyer) var., Sars, 1. c. p. 350, Northern Sea. 
Idotea elongata (Miers) ; Miers, Crust. New Zeal. p. 93, pi. ii. fig. 3. I. 
affinis (Miers) j note by Thomson, Tr. N. Z. Inst. xi. p. 23^. Both from 
New Zealand. 
Idotea lacustris, sp. n., Thomson, Tr. N. Z. Inst. xi. p. 251. Toma- 
hawk Lagoon, near Dunedin, New Zealand, feeding on the ova of 
Galaxias. 
Chiridotea, g. n. First three pairs of legs terminated by prehensile 
hands, in each of which the carpus is short and triangular, the propodus 
robust, and the dactylus capable of complete fiexion. Antennae with an 
articulate flagellum. Head dilated laterally. Operculum vaulted, with 
two apical plates. Type, Idotea cceca (Say), also 1. entomon (L.), sabini 
(Kroyer), and tuftsi (Stimps.). Harger, Am. J. Sc. (3) xv. p. 374. 
Synidotea, g. n. Antennae with an articulated flagellum. Epimeral 
sutures not evident above. Pleon apparently composed of two segments. 
