163 



A memoir by M. Duvernoy on the external organs of generation in the Crustacea, 

 appears in the ' Revue de Zoologie,' 1850, p. 552. 



The completion of Dr. De Haan's great vvork on the Crustacea of Japan, so long 

 delayed by the illness of the author, has been published during the past year. 



A series of articles by Mr. Dana has appeared in Silliman's ' American Journal 

 of Science and Arts' (vol. xi. and xii.), giving a complete generic synopsis of the Can- 

 croideous, Grapsoideous, and Oxyrhynchous crabs, with descriptions of many new spe- 

 cies of Grapsoidea and Oxyrhyncha. 



A memoir on the Crustacea of Western Tropical Africa has been published by Dr. 

 Herklots (' Additamenta ad Faunam Carciuologicam Afr. Occid.' 4to. Lugd.-Batav. 

 1851), containing descriptions of various new species, and an excellent and extended 

 table of the geographical distribution of the Crustacea of the whole of Africa. 



Professor L. R. Gibbes has published a list of all the species of Malacostracous 

 Podophthalma in the public collections of the United States,* amounting to 250 in 

 number, of which 22 are described as new, 100 only being known as inhabiting the 

 Atlantic coast of the United States. 



The 7th part of Professor Bell's ' History of British Crustacea ' has appeared, and 

 is occupied with the genera of Palemonidse, and also the genera Pasiphaa, PenaBus, 

 Cuma, Alauna, Bodotria, and Mysis. 



A list of localities of the rarer British Podophthalmous Crustacea in the County 

 Galway, has been published by Dr. Melville, (Ann. Nat. Hist. viii. 236). 



A list of the time of spawning of 24 British species of Crustacea has been published 

 by Mr. W. Thompson, (Ann. Nat. Hist. viii. 501). 



M. Duchassaing has communicated notices on the habits of 11 species of Brachy- 

 ura, natives of the Antilles, to the Rev. Zool. 1851, p. 77. 



A note by Mr. Dana on the genera Hexapus and Arges, both allied to Pilumnus, is 

 published in Silliman's 'American Journal,' Sept., 1851, and Ann. Nat. Hist. viii. 430. 



Mr. W. Thompson has published a note on the occurrence of Athanas nitescens at 

 Weymouth, (Ann. Nat. Hist. vii. 346) ; also a description of Gonoplax angulata (Ibid. 

 500), and a notice of Achaeus Cranchii (Ibid. viii. 77). 



Mr. White has also given an account of the rare Australian Potamobius serratus, 

 and the description of a new species of Gonodactylus from China, (Ibid. 421). 



ExTOMOSTRACA. 



Dr. Baird's memoir on the Limnadiadae (11 species, 6 being new), appears in the 

 last part of the ' Proceedings of the Zoological Society.' 



A new Entomostracan named Cypridina Zealandica, from New Zealand, has been 

 described by Dr. Baird, (Ann. Nat. Hist. vii. 430). 



The development and organization of Nicothoe Astaci, a minute parasite which in- 

 fests the gills of the common lobster, has been described and figured in detail by Van 

 Beneden, (Mem. Acad. Bruxelles, tome xxiv.) ; reprinted in the Ann. des Sci. Nat. 

 3rd ser. xiii. p. 354. 



P ABAS IT A. 



A memoir by M. Van Beneden, on the species of Lemseidae (32 in number, 8 of 

 which are new) parasitic on the fishes of Belgium, with the detailed description of a 



* The private collection of Mr. Wilson contains more than 1000 species. 



