mitted to our Society an account of the larvae of Lepas onatifera, ;t 

 more detailed account of « iiich has bi^en laid by him before the Royal 

 Society. A valuable report by M. Isid. Gcoffroy St. Hilaire, upon a 

 memoir by M. Edw ards, entitled ' Observations sur les Changeniens 

 en forme que les Crustaces ^prouvent dans le jeune age ',' must also be 

 noticed. 



Various isolated memoirs have also been recently pidilished upon 

 this class of animals, as that of Latreille upon the genus Prosopistoma '^ ; 

 of M. Guerin upon the Notopoda^, a curious group of Crabs; upon 

 Jseea, a genus of Hermit Crabs; and upon the Glass Crabs Phyllo- 

 soma*; of M. Polydore Roux upon the Shrimp family Salicogifes ^ ; of 

 M. Edwards upon the order Ainphipoda '• ; of M. Brandt upon the 

 Oniscid(E~ % of M. Roussell de Vauzeme upon the Whale Louse, 

 Cyamfus Ceti^ ; together with the description of the curious osculant 

 genus Praniza, published by myself in the ' Annales des Sciences 

 Naturelles' '\ 



The extraordinary oeconomy and organization of the Opossum 

 and Brine Shrimps, Mysis and Arteniia, have been detailed by 

 Mr. Thompson in ditfei'ent numbers oi' his ' Zoological Illustrations'. 

 And M. Savigny's remarkable doctrine of the transformation of cer- 

 tain parts of the mouth into organs of locomotion, and i-ice versd, has 

 received fresh confirmation in the memoirs of M. Edwards upon the 

 genera Sergesfes, Acctes, Sicyonki, and Thysanopoda. The same 

 author has also published no less valuable memoii's upon the remark- 

 able genera Glcmcothoe, Poiitia, Cviiia, Neba/ia, Thysanopoda, Am- 

 phion, and RJicea, in various numbers of the ' Annales des Sciences 

 Naturelles', and the 'Annales de la Societe Entomologique de Fi-ance'. 

 The same author has more recently published a memoir on the struc- 

 ture of the mouth of the siphonostomous Crustacea '° ; and has also, 

 in conjunction with M. Audouin, described a very minute and sin- 

 gular parasite found not unconnnonly attached to the branchief of the 

 common Lobster, and to which they have given the name of Nicothoe 

 Astaci^K We are indejjted to Dr. Gruithuisen for a memoir upon 

 the anatomy of Daphnia Sima '-. Dr. Leach has also published de- 

 scriptions of some new genera of Crustacea in the Transactions of 

 the Plymouth Institution for 1830; and Dr. Zeneker is the author of 



Caligi and other Parasitic Crustacea in the last part of the Nova Acta Caesareo Leop. 

 Naturae Curiosorum. 



1 In the Ann. des Sc. Nat, December 1833. 



" In the Nouvelles Annales de Museum d'Histoire Naturelle, Vol. II. 1834, 4to. 



3 In the Annales des Sciences Naturelles for March, 1832. 



* In the Annales de la Societe Entomologique de France, Vol. I. No. 3. 



* Memoire sur la Classification des Crustaces de la Tribu des Salicoques. Par 

 Polydore Roux. Marseille, 1831. 8vo. pp.39. 



^ In the Annales des Sciences Naturelles for November 1830. 



7 Conspectus Monographiae Crustaceoruni Oniscodorum Latreillii, in the Hulletiii 

 Soc. Imp. des Nat. de Moscou, Tom. VI. 1833, p. 170. 



8 In the Annales des Sc. Nat. for April and May 1834. 

 ^ In the same work for November 1832. 



10 In the Ann. des Sc. Nat., January 1833, Tom. XXVIII. p. 87. 

 '» In the Ann. des Sc. Nat. for 1826, Tom. IX. p. 345. 

 '- In the fourteenth volume of Nova Acta, &c. for 1828. 



