CRUSTACEA. 219 



The differences in the form of the frontal lobes between the two 

 species are, I may add, well shown in Targioni-Tozetti's figures 

 (vide ' Crostacei della Magenta,' pp. 173, 17<i, pi. x. figs. 4 & 5, 

 1877). 



All the specimens of this genus from the Magellan Straits, Falk- 

 land, Kerguclen, and Auckland Islands, and New Zealand in the 

 collection of the Museum belong to //. planatus. 



Of //. ovatus there are specimens in the collection of tho British 

 Museum from reefs on the N.E. coast of Australia (Saumarez) and 

 Port Jackson ( Cuming). I believe a very small specimen from King 

 George's Sound, S.W. Australia (/•'. M. Bqyner, H.M.S. 'Herald'), 

 also belongs here. Mr. Ilaswell (Cat. p. 114) mentions tho oc- 

 currence of Halicarcinus planatus, which he refers to the genus 

 Hymenosoma, at Port Western ; but as he merely quotes the 

 description and synonyms as given in my New-Zealand Catalogue, 

 I cannot be certain whether his specimens belong to H. 2^ ana -tus 

 or //. ovatus. 



95. Leucosia ocellata, Bell. 



A female example was obtained in the Arafura Sea at 32-36 fms. 

 (Xo. 1G0). 



There are besides in the Museum collection only the specimen re- 

 ferred to by Bell as from " Eastern Australia." which was obtained 

 at Cape Capricorn, on the Queensland coast (J. Macyillivray, H.M.S. 

 ' Rattlesnake '), and one without special locality collected by F. M. 

 Eayner (H.M.S. 'Herald 7 ). 



Mr. Haswell records this species from Keppel Bay, Queensland. 



96. Leucosia whitei. 



Leucosia whitei, Bell, Trans. Linn. Soc. xxi. p. 289, pi. xxxi. fig. 2 

 (1855) ; Cat. Leucosiidat Brit. Mus. p. 9 (1855) ; Haswell, 1'roc. 

 Linn. Soc. N. S. Wales, p. 45 (1880) ; Cat. Austr. Crust, p. 118 

 (1882). 



? Leucosia cheverti, Haswell, t. c. p. 47, pi. v. fig. 2 (1880) ; Cata- 

 logue, p. 120 (1882), var. 



A specimen from Flinders, Clairmont, N.E. Australia, dredged in 

 11 fms. (No. 108), in the first collection, belongs here, and one from 

 Prince of Wales Channel, 9 fms. (No. 157), second collection. Mr. 

 Haswell records it from Princess Charlotte Bay, Cape Grenville, and 

 Brook Island. 



I think that L. cheverti, Haswell, can scarcely be regarded as 

 more than a variety of L. whitei ; it is distinguished, according to 

 its author, by the form of the front, which is obscurely (not dis- 

 tinctly) tridentate, and by the absence of granules on the hepatic 

 regions. The hepatic granules, however, vary in number in the 

 specimens (four in number) in the Museum collection, and in one 

 are very obscurely marked. In two specimens from Shark Bay, 

 W. Australia (F. M. Bayner, H.M.S. 'Herald'), which I think 



