180 PURPUROIDEA, LYSIS, JOPAS. 



P. ANOMALA, Ang-as. P. 121, PL 36, fig. 422. 



This is described as a Cronia, but does not resemble the group 

 at all ; it is so like Ocinebra that I have preferred to place it 

 there. 

 P. AVELLANA, Reeve. PL 55, fig. 179- 



Shell smooth, distantly plicately ribbed ; white, mottled with 

 chocolate-color ; lip thickened and dentate within. Length, 1 in. 



N. Coast of Australia. 



Described as a Buccinum, with simple lip. H. and A. Adams 

 included it in the genus Clavella ; its really thickened, dentate 

 lip (per specimen before ine) and longitudinal ribs, together with 

 its form, show it to belong rather with Crania . 



Genus PURPUROIDEA, Lycett. 



This fossil genus has been confounded with Purpurina, d'Orb. : 

 its typical forms appear to be true Purpurae, and the species 1 

 figure has some resemblance to the recent P. chocolatum ; whereas 

 the species of Purpurina are nearly related, apparently, to 

 Gancellaria. 

 P. NODULATA, Lycetl. PL 55, fig. 180. Oolite. 



Genus LYSIS, Gabb. 



Founded on L. dwplicata, a cretaceous fossil from California, 

 and supposed by its author to be nearly related to Stomatia. J 

 have examined authentic specimens in our museum, and do not 

 hesitate to refer it to the Purpura?. 



L. DUPLICOSTA, Gabb. PL 55, figs. 182,183. Cretaceous, 



California. 

 Genus JOPAS, IF. and A. Adams. 



J. SERTUM, Brug. PL 55, figs. 181, 188-190. 



Shell varying from smooth or finely striate, to a form covered 

 with small revolving ribs, which are sometimes decussated and 

 rendered granulate by growth-lines. Chestnut-brown, more or 

 less imdulately marked with yellowish white, and having an in- 

 terrupted white band on the periphery. Sometimes purplish 

 red, with the band and maculations light purple. Aperture 

 whitish or cream-color, the lip margin and columella brown or 



blackish. Length. 1 '5-2*25 indies. 



Hed Sea to Paumotus I*le$. 



