A HISTORY OF SUSSEX 



M. grijfithsice, Cynthtlia Jiemingii, T'hemisto brevispinosa. For the first three 

 of these the names should now rather be respectively Praunus fexiiosus. 

 Leach, Neo?nysis vulgaris (Vaughan Thompson), Siriella armata (Milne- 

 Edwards). Goodsir's Cynthia jiemingii is supposed to be the same as 

 Leptomysis lingvura, Sars. The generic names Cynthia and Cynthilia are 

 withdrawn from it as contravening existing rules, but the specific name 

 jiemingii has the priority, if the identity of the species with lingvura can 

 be considered well established. Themisto brevispinosa, Goodsir, probably 

 belongs to the genus Mysis. Themisto in any case cannot be used for its 

 generic name, as it is preoccupied.^ 



The Stomatopoda, as they are now by preference called, are in 

 modern classification limited to the one family Squillids. White notes 

 the species Squilla desmarestii, Risso, as having been taken off Brighton, 

 and consigned to the British Museum from Dr. Mantell's collection.^ 

 These ' mantis-shrimps ' differ greatly from all the preceding sets of 

 Crustacea, by having the second maxillipeds transformed into powerful 

 claws in which the two last joints close together like a clasp knife, and 

 even more by having the breathing organs on the appendages of the 

 pleon instead of on those of the front body. White says that Risso's 

 Squilla 'is of a yellowish colour dotted with brown, but is sometimes 

 of a delicate rosy hue ; length about 4 inches.' ^ A well preserved 

 specimen of this pretty species sent me from Bognor by Mr. Guermonprez 

 fully agrees with the characters which have been assigned to it. The 

 eyes are small, triangular. The finger of the great claws has only five 

 spines. The first five segments of the pleon are devoid of submedian 

 carincB. The Rev. E. N. Bloomfield, in a letter dated July 30, 1902, re- 

 ports this species also from Hastings, found there by Miss H. F. Davies. 



Of the sessile-eyed Malacostraca species are recorded in sufficient 

 variety to indicate that Sussex would be well worth exploring for more 

 members of this copious division. Of the Isopoda anomala or cheli- 

 ferous isopods Mr. Guermonprez reports the occurrence on floating wood 

 of the species long known as Tanais vittatus (Rathke), but now, accord- 

 ing to M. Dollfus, more properly designated by the earlier name 'Tanais 

 cavolimi, Milne-Edwards.'' Among the Isopoda genuina may first be 

 mentioned the small but peculiar family of the Gnathiids, for among 

 the specimens from the Sussex coast which Hailstone submitted 

 to Westwood was one which the latter authority determined as Gnathia 

 maxillaris (Montagu), adding, ' It has been said that this is the male of 

 the genus Praniza, of which I have published an account in the Annates 

 des Sciences Naturelles. Is this so ? ' * It is interesting to know that 

 Dr. Leach, when establishing the genus Gnathia in 181 3, expressed the 

 opinion that the animal afterwards referred to a genus Praniza was the 

 female of Gnathia maxillaris. But it was not till 1855 that M. Eugene 



> On this group see Norman in Ann. Nat. Hist. (1892), and Stebbing, History of Crustacea (1893). 



* List of British Animals in British Museum, p. 46, and Popular History, p. 155. 

 3 Popular History, p. 155. 



* Bulletin Soc. Zool. de France, xxi. 207 (1897). ^ Loudon's Magazine, viii. 273. 



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