ISOPODA. 
Crust . 29 
masticatory parts rudimentary ; the immoveable finger of the chelipeds 
very short. II. cerstedi (Kroyer, Tanais ) = balthicus and rhynchites (F. 
Muller), Southern Norway, Denmark, and Coast of Pomerania, and II. 
anomalus , sp. n., Messina and Spezia, described : Leptoclielia limicola 
(Harger), New England, and Paratanais tenuis (Thomson), New Zealand, 
also belong to this genus. G. 0. Sars, l. c. pp. 29-31. 
Paratanais batii, sp. n., = forcipatus, Bate, nec Lilljeborg, Southern 
Coast of England, Norway, and Mediterranean ; id. 1. c. p. 32. 
Paratanais tenuicornis , sp. n., Haswell, P. Linn. Soc. N. S. W. vi. p. 194, 
pi. iv. fig. 3, and Cat. Austral. Crust, p. 307, Port Stephen, New South 
Wales. 
Typhlotanais , g. n. No eyes, hinder part of the body well developed, 
equal in breadth to the anterior part ; antennae of the first pair tri-articu- 
lated in the female, much greater in the male, beset with fasciculate sensi- 
tive bristles ; epistome prominent, globate ; all pleopods well developed;: 
abyssal. T. tenuimanus (Lillj., Tanais ), a.quiremis (Lillj.) = depressus 
(G. 0. Sars), brcvicornis (Lillj.), finmarchicus , assimilis. tenuicornis , micro - 
elides , spp. un., cornutus (G. 0. Sars, Paratanais ), penicillatus , sp. n., all 
from the coast of Norway, 30-300 fath., and messinensis, sp. n., Mediter- 
ranean. Sars, 1. c. pp. 33-40. 
Leptogna.thia , g. n. No ejms, body of the female narrow, elongate, 
hinder part composed of six distiuct segments, more developed in the 
male, first pair of antennae quadri-articulate in the female, much longer, 
with very large pencils of sensitive bristles in the male ; maxillae very 
small and weak ; three pairs of ambulatory feet equal ; all pairs of 
pleopods well developed. L. longiremis (Lillj., Tanais) — T. islanclicus 
(G. O. Sars), breviremis (Lillj.), hrevimana (Lillj.), filiformis (Lillj.), 
laticaudata . and ? manca , sp. n., all from the coast of Norway, the first 
also from Iceland, the third and fifth also in the Mediterranean, here 
described. To this genus belong also Tanais gracilis (Kroy.), graciloides 
(Lillj.), Paratanais rig idus (Bate), and Leptoclielia caeca (Harger). Sars, 
l. c. pp. 40-45. 
Pseudotanais, g. n. Body short, thick, the first three free segments 
very short, the last segment large; eyes absent or little developed; 
antennae nearly equal in both sexes, tri-articulate ; chelipeds also equal 
in both sexes ; pleopods either absent in the female, or present in 
both sexes ; P. forcipatus (Lillj., Tanais ), macrocheles , lilljeborgi , and 
mediterraneus, spp. nn., the first three from the coast of Norway, the last 
from Spezia. Sars, l. c. pp. 46-49. 
Cryptocope, g. n. Segments of the body separated by evident con- 
strictions : six segments in the hinder part ; no eyes ; antennae like 
those of Leptognathia ; pleopods and uropods of the female very short, 
biramous, well developed in the male. C. abbreviata (G. O. Sars, Tanais ), 
Fjord of Christiania, and veringii (G. O. Sars), Arctic Sea, abyssal. Sars, 
l. c. pp. 49-51. 
llaplocope , g. n. Body narrow, six posterior segments ; no eyes ; 
pLopods of the female very small, forming simple naked lamellae ; uro- 
pods rather long, biramous. H. angusta, sp. n., Southern Norway ; only 
the female known. Sars, l. c. pp. 51 & 52. 
1882 . [vol. xix.] 
c 10 
