45 Crust, 
CRUSTACEA. 
luOTElDiE, 
Idotea irrorata (Say) = tricuspidata (Desm.), I. phospJiorea (Harg.) 
and robusta (Kroy.) ; Harger, 1. c. pp. 343-350, pi. v. figs. 24-29, & pi. vi. 
figs. 30-32, New England. 
Idotea sp. P, young ?, not named, but described by Miers, J. L. S. xv. 
p. 64, North Atlantic, 57 N. lat. 
Saussureana, g. n. Distinguished from Idotea by the three anterior 
pairs of feet being prehensile, and the shortness of both pairs of 
antennae. Sp. n., not named, from Labrador, 71 millim. long, 22 broad. 
G. Haller, MT. schw. ent. Ges, v. p. 573, with a table. [Probably the 
long-known Idotea entomon (L.), genus Chiridotea^ Harger, 1878.] 
Chiridotea cceca (Say) and tuftsi (Stimps.) ; Harger, 1. c. pp. 338-341, 
pi. iv., & pi. V. fig. 23, New England. 
Synidotea nodulosa (Kroy.) and bicuspida (Owen) = marmorata (Pack.) 
pulchra (Lock.); Harger, 1. c. p. 351-353, the former figured, pi. vi. 
figs. 33-35, New England. 
Erichsonia filiformis (Say) and atlenuata (Harg.), id, 1. c. pp. 355-357, 
pi. vi. fig. 36, pi. vii. figs. 37-41, New England. 
Epelys triloba (Say) and montosus (Stimps.), id. 1. c. pp. 358 & 359, 
pi. vii. figs. 42 & 43, pi. viii. figs. 44-47, New England. 
MuNNOPSlDiE. 
Munnopsis typica (Sars), Harger, 1. c. pp. 330 & 331, pi. ii. fig. 11, Bay 
of Fundy and Arctic Seas. 
Eurycope robusta (Harg.), id. 1. c. pp. 332 & 333, pi. iii. fig. 13, Gulf of 
St. Lawrence. 
Asellidj:. 
Asellus cavaticus (Schiodte) = sieboldi (Rougem.), found in various 
caverns and wells ; it differs from aquations (L.), besides the want of 
eyes, chiefly by the more developed sensitive organs in the antennae, and 
by the more elongate first pair of uropods ; the number of joints in the 
lower antennae is variable in both, but ordinarily larger in aquations. 
Fries, Wiirtt. nat. J. H. xxxii. pp. 109-111 & 116. 
Limnoria lignorum (Rathke) = terebrans (Leach) ; Harger, 1. c. 
pp. 373-376, pi. ix. figs. 55-57, New England. 
Limnoria terebrans (Leach). The ravages made by it in the port of 
Cherbourg, which necessitated a thorough restoration of some wooden 
constructions, described, and several observations on its mode of life 
given by M. Clavenad, M^m. Soc. Oherb. xxii. pp. 73-85, pi. vii. It 
attacks floating wood as well as fixed ; but the latter only between the 
mean level of low-water at spring-tide, and that of high-water at neap- 
tide ; it is most active during the hot season, and its gnawing can be 
heard from without ; the young are hatched and grow in the holes, con- 
tinuing the destructive work of their parents in geometrical progression 
in the interior, whereas the offspring of Teredo is cast loose in the sea, 
