344 Mr. A. 0. Walker on 



ISOPODA. 



I. ? Ci/tnodoce truncata, Leach, 1818, (? . 



1818. Spha-roma pn'iIpau.ri(inu}n,T,efich. $. 



18G8. Sphrri-Dnia priileauxianum, Bate <fc Westwood, Hist. Brit. 



Sessile-eyed Crustacea, p. 4iri. $. 

 1868. Ci/modocea truncata, Leach, Ilist. Brit. Sessile-eved Crustacea, 



p. 426. J. 

 1873. Cymodocea tnmcata, Hesse, Ann. Sci. Nat. (5) vol. xvii. p. 14, 



pi. i. 

 1900. ErospfifProma pndeauxianttm, Leach, Stebbing, Proc. Zool. 



Soc. London, p. o53. 



1905. Cymodoce tnmcata, Leach, H. J. Hansen, " Propagation, Classi- 

 fication, iSrc. of Sphseromidae," Quart. Journ. Micr. Sci. xlix. (1) 

 pp. 69-13.5, pi vii. 



1906. Ctjmodoce truncata, Norman & Scott, Crust. Devon and Cornwall, 

 p. 44, pi. iv. figs. 3-14. 



As all the specimens collected (about thirty) appear to be 

 immature, the species cannot be identified with certainty ; 

 none of them exceeded 5 mm. in length, and no ovigerous 

 females were observed. They agree pretty closely with the 

 form figured by Norman and Scott {op. cjf. p. 44, j)l. iv. fig. 6) 

 and considered by them to be possibly young males. Re- 

 garding the specific identity of Cymodoce truncata and 

 tSpharoma prideauxtanum, the references given above may 

 be consulted. 



II. Idotkea haltica (Pallas). Rio de Janeiro. 



A large number of specimens, very variable in colour, 

 marking, and size. Females with ova measure from 6 mm. 

 to 10 mm. in length. This is a cosmopolitan species : for 

 localities and synonyms see " Isopods of N. America," Miss 

 H. Richardson (Bull. U.S. Nat. Mus. no. 54, 1905, p. 364). 



A M P H I P D A. 



III. Nototropis minikoi (A. O. Walker). Rio. 



1905. Paratylus minikoi, A. 0. W., Gardiner, Fauna Maid. Laccad. 

 vol. ii. p. 925, fig. 141. 



In quantity : previously recorded only from the lagoon of 

 the island Minikoi, one of the Maldives. 



