214 
CRUSTACEA. 
Hyperiidje. 
Vihiliajeangerardi (Lucas, 1849) ? = speciosa (Costa, 1853) ? = medi- 
terranea (Claus, 1872), living parasitically within /SaZpa (Forskal) 
and democratica (Forskal), in the Mediterranean, exactly described and 
figured by A. F. Marion, Ann, Sci. Nat. (6) i. pp. 5-11, pis. i. & xix. 
PHRONIMIDiE. 
Phronima. Habits and anatomy observed by J. D. Macdonald, P. R. 
Soc. xxii, pp. 154-158, with a plate ; he states that the young are found 
within the well-known barrel-like envelope of the adult animal. 
Themisto Uhellula (Mandt), very numerous on the surface of the 
Arctic Sea, near Greenland, between the packed ice, fully described by 
Buchholz, h c. pp. 385-387, pi. xv. fig. 1. 
Thaum[at']ops pellucida (Will.-Suhm) [see Zool. Rec. x. p. 189], fully 
described by Willemoes-Suhm, P. R. Soc. xxi. [1873] pp. 206-208, and 
Phil. Tr. clxiii. [1873] pp. 629-638, pis. xlix. & 1. It is Oystosoma 
neptuni (Gudrin) ; id. Nature, ix. p. 182. 
TyPHIDiE. 
Lycma (Dana). This genus proved to come very near Thyropus 
(Dana) = Typhis (Risso), by L. pulex, sp. n., found within^ the respira- 
tory cavity of Salpa 7naxima (Forskal), near Marseilles. In this animal, 
young specimens distinctly exhibit two pairs of antennae, the upper, 
consisting of five joints, persistent, the under lost in the full-grown 
specimens ; whereas it seems that in Lycma ochracea (Dana) the upper 
pair are lost. Marion, Ann. Sci. Nat. (6) i. pp. 13-19, pi. ii. 
ISOPODA. 
Praniziu^. 
Anceus. Hesse has observed that most of the species, in their 
larval state {Pranizci)^ live parasitically on fishes, but are difficult to be 
found, as they leave the fish as soon as it is caught; he describes A. 
halani, cotti-huhali^ unciferus,platyrhynchus^ and scombri^ spp. nn., all from 
the coast of Brittany, most of them observed in their different stages. 
Ann. Sci. Nat. (5) xix. 29 pp. pis. xxi. & xxii. A. surmuleti (Hesse, 
1864) is also figured. 
ARCTURIDiB. 
Arcturus danmoniensis, [rectius domnoniensis, dommucensis, or the 
modern devoniensis] sp. n., Sterring, Ann. N. H. (5) xiii. p. 201, pi. xv. 
Devonshire. 
Idotheid.®. 
Idothea rugulosa, sp. n., Buchholz, Zweite deutsche Nordpolarfahrt, ii. 
p^ 285, note, Spitzbergen. 
