SCHILDER : ON CYPBMA AND TRIVIA. 103 



the genera Cyprcea and Trivia, and whilst preparing a catalogue 

 containing all species, varieties, and synonyms, recent as well as 

 fossil, and tlie interpretations given to them by the various authors, 

 I have found many names which require changing either on account 

 of older homonyms, omitted by previous authors, or from other 

 reasons. All these changes are included in this paper, and 1 shall 

 treat them in alphabetical order as Shaw did, for no really satisfactory 

 system of grouping has so far been found. 



I propose the six following new names, my reasons for so doing 

 will be found in the notes on the names by which the species are 

 now known : — ■ 



C. dillwyni nov. nom. pro C margarita. Gray. 



„ liliputana „ T. scabrmscula, Koenen. 



„ massauensis „ C. gemmula, Weink. 



T. antillarum „ T. subrostrata. Gray. 



„ nix „ „ nivea. Sow. 



„ occidentalis „ „ pulla, Gask. 



Cypr^a annulata, Gray (1828). 

 Hidalgo (1906, Mon. gen. Cyprsea, pp. 24 and 146) says that Cyprcea 

 annulus, Linn., is figured in the " Encyclopaedia Metropolitana " 

 (1810) on tab. xiv under the name C. annulata. If this name be 

 regarded as a valid synonym, C. annulata, Gray, should then receive 

 a new name, for there is no synonym nor varietal name to supply it, 



CypRiEA camelopardalis. Perry (1811). 

 Sowerby and Vigors (1828, Zool. Journ., iii, p. 315 ; iv, pp. 218-20) 

 contested the validity of Perry's " Conchology ", for the author 

 gave many superfluous names to species already described by 

 previous writers. It is now generally admitted that the names 

 given by Perry must be accepted. 



Cypr^a cinerea, Gmelin (1790), and citrina. Gray (1825). 



The names of these species must not be changed, for cinerea, 

 lllMeuschen (1787, = ?), and citrina, Humphreys (1797, = cicercula, 

 Linn.), since neither author is accepted as valid (vide Shaw, 

 Proc. Malac. Soc, 1909, p. 292). 



Cypr^a deshayesii, Binkhorst (1861). 



This name (Monogr. Gastr. Ceph. du Limbourg, p. 17) was pre- 

 occupied by Gray (1828, Zool. Journ., iv, p. 83), whose Cyprcea 

 deshayesii is now considered as a Gisortia ; the name given by 

 Binlchorst must therefore be changed into C. stromhecM, Kaunhowen 

 (1898, Palaont. Abhandl., Neue Folge, iv, pars, i, p. 75). 



Cyprcea deshayesiana, Kouault (1848, Bull. Soc. Geol. France, 

 (2) V, p. 207), was afterwards changed by its author (1848, Mem. Soc. 

 Geol. France, (2) iii, p. 501) into C. Jconinckii ; the former being a 

 nomen nudum, there is no doubt that honinckii is the valid name of 

 the species. 



