ISOPODA. 
Crust . 31 
and third pairs of periopods being simple, or only the second imperfectly 
subchelate. II. purpurea [-reum] and maculata[-tum,], spp. nn., id. 1. c. 
pp. 47G & 477, pi. xviii. figs. 2 & 3, and Cat. Austral. Crust, pp. 305 & 306. 
Cruregens, g. n., near Paranthura (Bate). Telson and last pair of abdo- 
minal appendages as in Haliophasma (Haswell), but only six pairs of 
thoracic feet, the last (seventh) pair wanting. No eyes. C.fontanus , sp. n. 
From a pump at Eyreton, North Canterbury, New Zealand. , Chilton, 
Tr. N. Z. Inst. xiv. p. 176, pi. x. figs. 1-12. 
Idoteid;e (incl. Arcturim:). 
Arcturus longicornis and brevicornis, spp. nn., Haswell, P. Linn. Soc. 
N. S. W. vi. pp. 194 & 195, the latter pi. iv. fig. 5 ; Cat. Austral. Crust, 
pp. 303 & 304, Australia. 
Arcturus furcatus , sp. n., Studer, SB. nat. Fr. 1882, pp. 56 & 57, Ker- 
guelen, 60 fath. 
Astacilla arietina and dilatata, spp. nn., Sars, Forh. Selsk. Chr. 1882, 
pp. 62 & 63, pi. ii. figs. 2 and 3, Norway, the latter also in the Mediter- 
ranean. 
Arctur\o~\ides, g. n. Intermediate between the Arcturidce and Idotheidce ; 
body linear, cylindrical, without epimeral plates, pleon and telson form- 
ing a large caudal plate ; external antennae long, 5-jointed, with 3-jointed 
flagellum, prehensile ; four anterior pairs of periopods short, unguiculate, 
their inner margin sharp, and provided with short, stiff bristles ; the 
three following pairs longer, ambulatory. A. cornutus , sp. n., Kerguelen, 
115 fath. Studer, l. c. pp. 57 & 58. 
Glyptonotus sabinii (Kroy.), Iloek, Crust. ‘ Willem Barents,’ p.30, pi. ii. 
figs. 1 1 & 12, Arctic Sea. 
Colours of Idotea tricuspidata variable, in relation to the surrounding 
objects ; Matsdorff, Diss. Inaug. 1882, 2 pis. See above, General Subject. 
Idotea caudacuta , Victoria and Tasmania, and excavata, Tasmania, 
spp. nn., Haswell, P. Linn. Soc. N. S. W. vi. pp. 181 & 182, the former 
pi. iv. fig. 4 ; both also in Cat. Austral. Crust, pp. 276 & 277. 
Cecidotcea nicJcajacJcensis , sp. n., Nickajack Cave, Tennessee ; Packard, 
Am. Nat. xv. p. 879, pi. vii. fig. 3. 
Munnopsid^e. 
Eurycope gigantea (G. O. Sars), Hoek, Crust. ‘ Willem Barents,’ p. 34, 
pi. ii. figs. 18 & 19, Arctic Sea. 
Eurycope latirostris , sp. n., Sars, Forh. Selsk. Chr. 1882, p. 67, pi. ii. 
fig. 6, Norway. 
AsELLIDiE. 
Asellus brevicauda and intermedius , spp. nn., and stygius (Packard) = 
microcephalus (Cope), all from Illinois, fully described by A. Forbes, 
Bull. Illin. Mus. i. [1876] pp. 8-13 & 22. A. militaris,&p. n., Hay, Illinois 
State Laboratory Bull. No. 2, p. 90, Abingdon, Illinois. 
