OF CONCnOLOGY. 8T 



Culver (without tlie Pleurobranclis) and to the Scutibranchs 

 of the same author. 



2. Ciiclohranchs, correspouding with Cuvier's group. 



3. Heteropod Stegihranchs (Heteropoda of Cavier,) which, if we 

 take Girinaria as the type, have the heart and branchiae 

 within a small shell. The shelless Heteropoda must be left 

 with Garinaria. 



-i. The lanthinae, which have their branchial laminse half con- 

 cealed by the shell, and which, like the Heteropoda, deserve 

 to be separated on account of their curious appendage. 

 Their pectinated branchias also form a transition from the 

 Stegihranchs to the Endobranchs. 

 in. The order of Endobranchs would correspond with the 



Pectinibranclis and Tubulibranchs of Cuvier. They may be 



divided into Turbmataand Tuhulata. 



1. The Turhin'Ua (the old Pectinibranchs) might retain the old 

 Cuvierian subdivisions, or the much more natural division 

 of De Blainville into Siphonobranchs and Asiphonobranchs. 



2. The Tahulata are the old Tubulibranchs, 



Comptes Mendus, Nov. 16, 1863, p. 826." 



No. 75, April, 1864. 



On (he Species of Neasra, found in the Seas of Japayi : by 



ARTHUR ADAMS. 



Several new species are described, and the following new 

 sub-genera: — 



Rliinomya, Cardiomya, Leptotnya, Leiomya, Endopleura. 



Characters of new Land Shells from the Mahabaleshwar 

 Hills in Wet'tern India and from Agra in the Northwest 

 Provinces : by av. h. bensox. 



Achatina Arthuri, Helix Nelierensis, CarycMuin Boysianum. 

 If o. 78, April, 1864. 



On some veio Genera aifd Species of Mollusca, from the Seas 

 of China and Japan : by a. adams. 



Gallocardia, n. g. Eucharis Recluzi. 



G. guttata. " Gouldi. 



lacra Japonic^. " Stimjjsoni. 



Thecodonts, n. g. Leptoconchus rostratus. 



T. Sleholdi. Opalia exquisita. 



Bucardia Gumi.ngi. Smaragiinella Sieholdi. 



Diagnoses of new Forms of llollusks, collected at Cape St. 

 Lucas, by Mr. J. Xantus : by p. p. carpenter. 



Asthenothserus, n. g. Lucina lingualis, 

 A. villosior. Grenella infiata. 



Solemyn v.xlvulus. BryopMla^ n. g. 



