37 Crust, 
CEUSTACEA. 
ISOPODA. 
Tanaid^. 
Tanais novce-zeelandice^ sp. n., Thomson, Ann. N. H. (5) iv. p. 417, 
pi. xix. figs. 5 & 6, Dunedin. 
Leptochelia (Dana) = Paratanais (Dana) ; L. rapax, sp. n., Harger, 
P. U. S. Nat. Mus. 1879, p. 163, New England. 
Aectueidji. 
Arcturus tuherculatus, sp. n., Thomson, Ann. N. H. (5) iv. p. 416, pi. xix. 
figs. 1-4, male and female, Dunedin. 
Astacilla granulata (Sars, as Leachia, 1877) = americana (Harger, 
1878) ; Harger, 1. c. p. 161. 
Idoteid^e. 
Idotea. Change of colour observed by P. Mayer ; see above, in General 
Subject. 
Idoiea irrorata (Say, as Stenosoma, 1818) = tricuspidata (Desm., 1823), 
common to Europe and North America ; Harger, 1. c. p. 160. 
Idotea euplectelloi^ sp. n., found inside the silicean sponge Euplectella 
aspergillum ; Landois, JB. zool. Sect, westf, Ver. 1879, p. 41, Philippine 
Islands. 
Asellid^. 
Janira spinosa, sp. n., Harger, 1. c. p. 158, Banquereau, New' England. 
Asellodes alba (Stimps.) belongs also to this genus; id. ibid. 
Asellus cavaticus (Schiodte, Leydig, 1871) = sieboldi (Rougem., 1876), 
found in several spots in Germany, and its differences from A. aquaticus 
(L.) pointed out, especially in the first abdominal feet of both sexes, by 
Fries, Zool. Anz. ii. pp. 129-134. Other differences between both species, 
for instance, in the number of sensitive bristles of the first maxilla, 4 in 
A. aquaticus^ 5 in cavaticus, and in the comparative size of the hepatic 
organs, are pointed out by M. Weber, tom. cit. pp. 150 & 151 (abstract in 
J. R. Micr. Soc. ii. pp. 721 & 722). 
Asellus foreli, sp. n.. Lake of Geneva, in depths of 200-300, rarely only 
40-60 metres; distinct from cavaticus, by lesser size, constantly three 
olfactory cones (Ricchzapfen), and a smaller number of lids in the flagella 
of both antennae. Blanc, Bull. Soc. Vaud. xvi. pp. 377-394, pi. xiv. 
Abstract in Zool. Anz. ii. pp. 428-431. 
Limnoria has unmistakable affinity to the Sphceromidce ; Harger, 1. c. 
p, 161 ; he proposes a new family, Limnoriidce, for its reception. 
' Oniscid^. 
G. Budde Lunde (Prospectus, &c. : supra, in Titles) gives a list of the 
know’n terrestrial Isopoda, containing 26 genera, to which 11 sul)genera 
