SHAW : ON cypHjEA and tbivia. 309 



Trivia nivea, Sowerb5^ 



T. nivea, Sow.: Conch. Illust., 1832, p. 13, No. 122, fig. 38*. 



= scahriuscida, Kiener {non Gray): Coq. Viv., p. 133, pi. xliii, fig. 3. 



Trivia suffusa, Sowerby. 



T. suffusa, Sow.: Concli. Illust., 1832, p. 13, No. 126, fig. 41. 



= T. Armanditia (Duclos MSS.), Kiener : Coq. Viv., p. 140, 

 pi. xlvi, fig. 2. 



Trivia Californioa, Gray. 



This species was first described by Gray as T. CoIifortiianaJ In 

 1832 Sowerby^ refers to the same species under the name Californica, 

 which has been used ever since by subsequent monographers, and like 

 Hidalgo, I think that the original appellation should be employed. 



Trivia Europ^a, Montagu.^ 



After reading Pulteney's description of Trivia arctica,^ it will at 

 once be perceived that this shell is the T. EuropcBa of Montagu, 

 and I entirely agree with Hidalgo (p. 263) in reducing Europcea to 

 a variety, but would point out that the figure he quotes (pi. xxii, 

 fig. 6, in the Dorset catalogue) does not represent arctica but pediculus, 

 Linn., as it was intended to do. 



Pulteney's description, which is as follows, was published in 1799, 

 while Montagu's did not appear till 1808. 



Trivia arctica. — "Shell differs from the foregoing [7*. 2}edicuh(s^ 

 in being smaller and in wanting the longitudinal furrow on the 

 back, and in being without spots. I have found it at Poole and 

 Weymouth." As will be seen, he chose for his type the unspotted 

 shell, while Montagu's type is the one with the brown spots on 

 the dorsal surface. The latter in his description sa3^s, " The Cyprcea 

 Europcca with spots, and that without spots termed arctica, may be 

 considered as perfectly formed varieties." In order, therefore, in 

 some way to keep the well-known name, I propose to call Montagu's 

 species T. arctica, Pult., var. E^iropcea, Mont. 



I may perhaps add that the variety minor described by Marshall ° 

 is simply a small T. arctica [ex typo), and not the same as var. minor 

 of Monterosato.'' The latter is the T. MoUerati, Locard,' which, 

 although considered by some as a species, seems to be simply a small 

 globose form of T. arctica with the costae slightly more pronounced. 

 At most T. MoUerati is only a variety of T. arctica, and certainly 

 not a good species, and is the same as T. glohulosa (Monterosato 

 MSS.), Locard, Coquil. mar. Corse, 1900, p. 32. 



1 Zool. Journ., 1828, vol. iii, p. 365. 



' Conch. Illust., p. 13, No. 127, tig. 42. 



^ Test. Brit. Suppl., 1808, p. 88. 



1 Cat. Dorset. 1799, p. 39. 



5 Journ. of Conch., 1893, vol. vii, p. 263. 



^ Enum. e Sinon. delle Conch. Mediterranee, 1878, p. 49. 



" L'Echange, 1894, p. 131. 



