CRUSTACEA. 
521 
example, Anonyx^ Dcxamine, Atylus, JEurydice^ and even young specimens of 
Portu7ius marmoi'eus (Leach). This is no proof of parasitism. Edward, Joiirn, 
Linn. Soc. ix. pp. 143-147. 
Hyperia tawiformis and pi'chensilis, spp. iin., Sp. Bate and Westwood, 1. c, 
pp. 519, 620, with woodcuts, Banff, found by Mr. Edward. — IL cyanea 
(Sabine as Talitrus, M.-Edw. as Metoacus) taken on the shores of the Moray 
Frith (never in a Medusa) by Mr. Edward. Ibid. p. 621. 
Themisto crassicornis (Kroyer) British, found by Mr. Edward off the coast 
of Banfl-, Sp. Bate and Westwood, 1. c. p. 652, with woodcut. 
Themiste antarctica (Dana) observed in Magellan Straits. R. Cunningham 
and Sp. Bate, Ann. & Mag. Nat. Hist. i. pp. 444 h 447. 
Vibilia hoi'ealis, sp. n., Sp. Bate and Westwood, 1. c. p. 624, with woodcut, 
taken off the coast of BanflP ; its swimming described by Mr. Edward : never 
found in a Medusa. 
LiEMODIPODA. 
Cap7'ella mcyacephala, sp. n., Alph. M.-Edw. Nouv. Arch. Mus. iv. p. 89j 
pi. 20. fig. 12, Madagascar. 
Caprella dilatata and C. rohusta (Dana) are perhaps only dillerent in sex ; 
found at Rio .Janeiro among the zoophytes which were attached to the screw 
of a vessel. Sp. Bate, Ann. & Mag. Nat. Hist. i. pp. 440 & 448. 
ISOPODA. 
luOTEIDiE. 
Idotca anmdata (Dana), of a brilliant blue, pelagic in the Southern Atlantic, 
occasionally under Pht/snlia. Rob. Cunningham and Sp. Bate, Ann. & Mag. 
Nat. Hist. i. pp. 443 & 447, pi. 21. fig. 1. 
AsELLIDA5. 
Limnol'ia xylophaga, sp. n., Hesse, Ann. Sci. Nat. x. pp. 101-121, pi. 1, 
fully described. 
Tanais (M.-E.). The branchial appendage on the first pair of gnathopods 
observed and figured by Sp. Bate, Ann. k Mag. Nat. Hist ii. p. 120, pi. 11. 
fig. 6, This supports the assertion of Van Benoden and Fritz Miillor that this 
genus should be placed near the family of Dmstylidtx. — Species of this genus 
live in submerged wood, like Limnoria, and produce, probably from their 
mouth, long flat threads, which, by their anterior subcheliform feet, are fixed 
to parts of the wood, and serve to keep it together. Hesse, Ann. Sci. Nat. 
X. p. 116. 
ONISCIDiE. 
Sp. Bate and W^estwood separate this family as a higher 
division, with the name Aero-spirantia. All the British species, 
seventeen in number, are described and figured in woodcuts. 
Brit. Sess.-eyed Crustac. p, 438. 
Ligia baudiniana (M.-E.) observed at Rio Janeiro. Rob. Cunningham 
and Sp. Bate, Ann. & Mag. Nat. Hist. i. pp. 443, 446. 
Ligia occanica (L.) British, Sp. Bate and Westwood, I, c. pp. 442-447. 
