MOllNIA, SII'IIONALIA. 133 



S. Dalli, Friele. PI. 87, tig. 625. 



8. UNDULATus, Friele, PI. 87, fig. H2fi. 



Not published ; figured from advance plate of the Norwegian 

 North Sea Expedition. N. Dalli appears to be a S. fortuosus 

 with well-deA'eloped spiral sculpture (see t. 51, f. 302-305); S. 

 undulafus is not adult. 



Neptunea Ossiani, Friele. PI. 87, fig. 621. 



Form similar to N. Turtoni, with 3^elloAvish brown, somewhat 

 scabrous epidermis. Length, 88 mill. 



Near Lofoten, Spitzbcrgen. 



The scidpture and epidermis, mouth and canal, are considered 

 difllerent from N. Turtoni, and the shell is less solid. Cer- 

 tainly very closely related. 



Subgenus Mohnia, Friele. 



M. MoHNii, Friele. PI. 52, figs. 331, 332. 



White, subpellucid, epidermis thin, smooth or slightly hispid. 



Length, 22 mill. 



North Atlantic Ocean. 



The paucispiral operculum is the distinguishing feature of this 

 species and subgeniis ; and I can scarcely believe that some error 

 has not occurred in assigning such an operculum to one of the 

 BuccinidiE, because we are accustomed to consider this form as 

 evidence that the shell to which it belongs is holostomate. 



(4<iuis SIPHONALIA, A. Adams. 



This genus is principally of tropical and subtropical distribu- 

 tion, and more highly colored than Neptunea : which, neverthe- 

 less, it approaches very nearly in the form and color of S. 

 Kellettii., for instance. The metropolis of the genus is Japan, a 

 few forms being found, however, on the opposite shores of the 

 West Coast of North America ; some species occur also in Aus- 

 tralian waters. The shells are usually thin and ventricose, varie- 

 gated in color, and destitute of epidermis. The operculum is 

 fusoid. 



A number of the species have been recently described by Mr. 

 Arthur Adams and others, the diagnoses being imaccompanied 



