14 THE ANNALS AND MAGAZINE OF NATURAL HISTORY. 



253. [Gray, J. E.] Two recent species of Trigonia. i, pp. 481 & 482 

 [1838, Aug.]. 



254. . Note on Dr Philippi's Zoological Notices in the preceding 



Article, iv, pp. 305-307 [1840, Jan.]. 



See Philippi (459). 



255. . Some Remarks on the foregoing Paper of Dr L. Pfeiffer, 



especially on the Clausiuni of Clausilia. v, pp. 243 & 244 [1840, 

 June]. 



See Pfeiffer (458). 



256. . On the " Freshwater Carriers," or Thelidotmis of Mr Swainson. 



V, pp. 257 & 258 [1840, June]. 



257. . On the Genus Pupina. vi, p. 77 [1840, Sept.]. 



258. , New [Helicoid] land shells from New Zealand, vi, p. 317 



[1840, Dec.]. 



259. . On the Animal of Spirula. xv, pp. 257-260, 444, pi. xv 



[1845, April and June]. 



260. . On the habits of Dispotea — Cup and Saucer Limpets, xvii, 



pp. 136 & 137 [1846, Feb.]. 



261. . New Species of Volute [ V. sophia]. xviii, p. 431 [1846, Dec.]. 



262. . On the Operculum of Gasteropodous MoUusca, and an attempt 



to prove that it is homologous or identical with the second Valve of 

 Conchifera. (2) v, pp. 476-483 [1850, June]. 



263. . On the Animal of Nautilus. (2) vi, pp. 269 & 270, fig. [1850, 



Oct.]. 



264. . An attempt to arrange the species of the family Pholadidce 



into Natural Groups. (2) viii, pp. 380-386 [1851, Nov.]. 



265. . Observations on the Genus Rhizochilus of Steenstrup. (2) viii, 



pp. 477-479, pi. xvii [1851, Dec.]. 



266. . Obser rations on the genus Acostcea of D'Orbigny. (2) ix, 



pp. 152-154 [1852, Feb.]. 



267. . Observations on Professor Loven's Homologies of MoUusca. 



(2) ix, pp. 215-217 [1852, March]. 



268. . On the Tongues of MoUusca. (2) x, pp. 411-417 [1852, Dec.]. 



269. . On the Division of Ctenobranchous Gasteropodous MoUusca 



into larger Groups and Faraihes. (2) xi, pp. 124-133, figg. [1853, 

 Feb.]. 



270. . Revision of the Families of Nudibranch MoUusks, with the 



description of a new Genus of Phillidiadce. (2) xi, pp. 218-221 [1853, 

 March]. 



271. . On the Genus Bifrontia. (2) xi, p. 260 [1853, April]. 



272. . A Revision of some of the Families of Conchifera or Bivalve 



Shells. (2) xi, pp. 33-44, 398-402 [1853, Jan. and May]. 



273. . On the Operculum of the Genus Diplommatina. (2) xii, 



pp. 9 & 10 [1853, July]. 



274. . On the Teeth of the Genus Mitra, Lamarck. (2) xii, pp. 129 



& 130 [1853, Aug.]. 



275. . On a new genus of Anomiadce. (2) xii, pp. 150 & 151 [1853, 



