MOLLUSCA. 221 



(2) Si/char : testa elongata, anfractus rotundati, apex mamillaris ; con- 

 taining Tr. vitreus, from Malacca. 



(3) Mastonia : testa aciDninata, circa medium tuniida ; including Tr. 

 vtilpinus, ruber, Carteretensis, from New Ireland, T. monilifer, clemens, 

 from Malacca, T Grai/ii, from the Mediterranean, T. affiids and castus, 

 from the West Indies, T. calebs, eemulans, concinnus, rosens, candidus, 

 and Jiilaris, from the Pacific, tristis, to which no locality is assigned. It 

 is probably to be expected that of these numerous species several will be 

 united as varieties of one and the same. The differences relate principally 

 to the number of whorls, and to the number and colour of the rows of 

 tubercles. To the above may be added, from the same author (Proc. p. 22), 

 T. (Lio) pagodus and T. (Mastonia) collaris, from the Philippines. 



Natica sagittata, Menke : globular, with curved longitudinal lines, a series 

 of round spots at the suture ; in the middle of the last whorl, three rows of 

 arrow-shaped spots ; umbilicus contracted by a white callosity. N. sertata, 

 id. : hemispherical, longitudinally furrowed at the suture ; on the last whorl, 

 two rows of brown coloured branching spots ; both from the west coast of 

 New Holland. Recluz has described (Proc. p. 204) thirty-one species of 

 this genus, most of which are stated to be new. N. Cookii, Recluz. (Proc. 

 p. 197), from Comora. 



Of the genus Narica, which with Velutina, Fossarus, and perhaps Neritopsis, 

 would seem to constitute a special small family, the Velutiuidae, bet\veen 

 Blainville's Coriocellae and the Nerita?, Recluz has enumerated the nine 

 hitherto known species, and added eight collected by Cuming in the Philip- 

 pines, and four from his own collection. 



In the second part of Philippi's work, one plate exhibits fourteen spe- 

 cies of Neritinte. Of these are described as new : N. elegantina, Busch, 

 (N. purpurea, Cumiug), and six species by the same author from Java : 

 n/gosa,fuligi)iosa,Jlavovirens, inconspicua, bella, and nitbila; aterrina, Koch, 

 locality unknown, and lugubns, Phil., from the Sandwich Islands. Besides 

 which there are figured, granosa, Sow., ziczac, Lam., melanostoma, Trosch., 

 sandwichensis, Desh. ? bcetica, Lam. In the conclusion it is remarked that 

 .A", liamuligem, Trosch. = N. Smithii, Gray (Sow. Conch, iii, fig. 36) ; the 

 former name, consequently must be abolished. Recluz again institutes ten 

 species (A Nerita (Proc. p. 71), and further (ib. p. 198) eleven species. Of 

 the last, N. Rumpldi, he distinguishes thirty-two varieties. 



Lovell Reeve gives the diagnoses of ten species of Delph inula, which are 

 figured in his Conchologia iconica. (Proc. Zool. Soc. p. 141.) 



Two plates, one in the second, and one in the third Part of his work, are 

 devoted byPhilippi to the genus TrocJius in the widest acceptation of the name. 

 In the first plate eight species are figured : T. triumphans, Ph., (GuilfonUai, 

 Reeve), Hanleyamts, Reeve, Antonii, Koch, allied to T. granulutus, Born, 



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