Bibliographical Notices. 489 



maintain that, whether they be all of one species or not, 

 the Rev. A. M. Norman has done nothing to prove they are 

 or are not sexually distinct. It is, however, too small a subject 

 to pursue further. I feel assured, as was stated in the ' His- 

 tory of the British Sessile-eyed Crustacea,' that the Lestrigoni 

 are the males of Hyperice ; but I also think that it is desirable 

 not to sink the name of the male until a new work of reference 

 takes the place of those at present in use, wherein it is known 

 as Lestrigonus'^ . 



The specimen from which I described Diastylis hiviargina- 

 tus was a very poor one, and much broken before it reached 

 me ; but certainly it is not Diastylis spinosa of Norman, or his 

 name and description are singularly infelicitous. 



BIBLIOGRAPHICAL NOTICES. 



The Geology of Sussex ; or the Geology and Fossils of the Tertiary 

 and Cretaceous Formations of Sussex. By the late Frederick 

 Dixon, Esq., F.G.S. New Edition. Revised and augmented by 

 Professor T. Rupert Jones, F.R.S., F.G.S. 4to. Pp. xxiv and 

 469. With a Geological Map, 64 plates, and numerous woodcuts. 

 W. J. Smith : Brighton, 1878. 



The first edition of this splendid work, so well known to geologists, 

 was published in 1850, when Mr. Dixon's posthumous writings 

 were completed and supplemented by his friends Professors Owen, 

 Bell, and Eorbes, Messrs. Sowerby, Lonsdale, and others, and edited 

 by Owen himself. The illustrations and descriptions of the Ter- 

 tiary and Cretaceous fossils then supplied to geologists rendered 

 this a classic EngHsh work. Since Mr. Dixon's decease further 

 researches among the highly fossiliferous strata of Bracklesham and 

 the neighbouring districts have enabled Prestwich, Edwards, Fisher, 

 and others to compare and classify this portion of the Eocene for- 

 mations, with great exactitude, one with another and with similar 

 strata in France and elsewhere. So also with regard to more 

 recent deposits along the Sussex sea-board, R. Godwin-Austen, J. 

 Prestwich, and A. Bell have elucidated, far more clearly than pre- 

 viously, the extent, relations, and age of the " old raised beach," 

 the " boulder-bed," the " mud-deposit," and other now weU-known 

 Post-tertiary formations, which had already received much atten- 

 tion from Mantell, Lyell, Dixon, and earlier observers. 



* Wheu I wrote to the ' Annals ' I was under the impression that Les- 

 trigonus had priority of date to Hyperia ; but I fiud that the latter is one 

 year in advance. Hence I wrote as I did, rather than Hyperia (Lestrigo- 

 nus) spinidorsalis. I thank the Rev. A. M. Norman for giving me the 

 opportunity of correcting it. 



