226 . MAZATI,AN TJXIVALVE3 



"Would accord pretty well with Ph. perforata, but is not 

 perforate," at any rate in the adult state. Only one very dead 

 shell and some fragments were found of this species, which 

 appears to be sufficiently common on the Californian coast, 

 where it represents the Ph. perforata of the tropical fauna. In 

 the Sta. Barbara specimens, the colour and general appearance 

 resemble the small variety of Ph. pullus. The operculum 

 only differs from that of Ph. perforata in having the wrinkles 

 rather coarser, and not covei'ing quite so large a surface : this 

 however may be only the effect of age. One of Dr. Gould's 

 specimens from San Diego measures long. '22, lat. '13, div. ^. 

 The Mazatlan shell is much smaller. 



JTa^j.— San Diego, Mr. BlaJce Sf Br. We?jb.— Sta Barbara, off 

 zoophj'tes. Col. Jewett. — Mazatlan ; 1 dead sp. in shell wash- 

 ings ; L'pool Col. 



Tablet 1086 contains the specimen. 



Genus BANKIVIA, Beck. 



Beck, in Krauss, Sicdafr. Moll. 1848.— S". Sf A. Ad. Gen. i. 

 ^o.—Phil. Sandb. Conch, p. 212. 



285. Bankivia vaeians, jun, Bed: 



Phil, in Kust. Mart. p. 33, pi. 5, f. 1—5. — Krauss, Sndafr. 



■ Moll. -p. 105, pi. 6. f. 7. 

 = Phasianella fasciata, Mke. Si/n. Moll. Nov. Soil. ed. 2, p. 141. 

 + P. undatella, 2fke. loc. cit. 

 + P. fulminata, Mke. loc. cit. — Anton Verz. p. 61, no. 2137. 



One very young fresh specimen of this well marked shell was 

 found on the back of a Chama. It exactly resembles young 

 shells from Australia. How it had found its way from its 

 native haunts, it is impossible to say. It is of the uniform red 

 variety, with a dark sutural line. There are 4 turns of the 

 spire, with a very flattened apex. Long. "06. lat. '05 ; diver- 

 gence of last whirl 10" ; tlie next would probably be much less. 

 Anton's name has precedence over that adopted by Krauss, 

 teste Gray. 



