OF CONCHOLOGY. 139 



Gallinula, (Klein), H. and A. Adams. Inner lip restricted, 

 not spread widely over the body whorl ; posterior canal fre- 

 quently long, ascending the spire. S. Campbellii, Gray. 



Canamum, Schum. Inner lip restricted ; outer lip not di- 

 lated ; posterior canal short or obsolete. S. albus, Mart. 



The Strombi are reported from the base of the Cretaceous, 

 becoming more numerous in the Tertiaries, and attaining their 

 maximum development in the present seas. 



Genus PUGNELLUS, Con. Plate 13, fig. 1, 2, 3. 



Shell fusiform in the young state ; in the adult aperture 

 narrow, outer lip developed into a massive lobe, notched above 

 and below ; canal produced and incurved ; the whole shell en- 

 veloped in a more or less heavy incrustation, a prolongation of 

 the deposit on the inner lip. 



P. densatus, Con., P. hamulus, Gabb.,P. (Strombus) uncatus, 

 Forbes sp. Peculiar to the Cretaceous. 



S. Gen. Gymnarus, Gabb. Plate 13, figs. 4, 5. General 

 form ofPuc/nellus ; outer lip less heavy and produced posteriorly 

 in a hook ; anterior canal slightly produced and straight ; in- 

 crustation not covering the entire shell, the back being exposed. 



P. manubriatus, Gabb. Palaeontology of California, vol. i, p. 

 125, pi. 29, fig. 229, 229a, 



A single species from the Chico group of California (lower 

 chalk or upper green sand.) 



Genus PTEROCERA, Lam.* 



Outer edge of mantle digitate ; operculum as in Strombus. 

 Shell ovate, spire more or less elevated ; aperture elongate, 



* In defence of the position which I take in using this name instead of 

 Klein's Harpago, I could not express myself more happily than has 

 already beeu done by Dr. P. P. Carpenter. I therefore quote his note 

 at length. 



"The names of Klein in his ' Tentamen ' and ' Lucubrantiuncula,' 

 1773, are not entitled to precedence (according to Brit., Assoc, rules), 

 because he evidently did not adopt the Linnaean mode of biuomial nomen- 

 clature. What he calls a genus answers more to the modern idea of a 

 chapter or section. By chance some of his names are allowable ; but, 

 if used, the genus must be regarded as that of Adams, Gray, Murch, or 

 other writer who defines it. The following will serve as illustrations of 

 Klein's ' genera.'—' Sol, Lima. Stella, Sfc; Auris, Anas, Tigris, Pes-Anse- 

 nnus, Tiiba-phonurgica, Cochlea-lunar is, Cochlea-ccelata, fyc. ; Buccinum- 

 lacerum, Buccinum muricatum, Tkema-musicum, fyc; Ostreum-tmbrica- 

 tum, Ostreum-muricatum, fyc. ; Muscuius latus, Musculus-mammartus, 



