OF CONCHOLOGY. 147 



ascending the spire, trilobate, the middle lobe much larger and 

 more produced than the others, carinated on the outer side." 



P. Tippana, Meek — Harpago Tippana, Con. But a single 

 specimen, from the Cretaceous. 



Subfamily STRUTHIOLARIN^. 



Animal with outer mantel-margin simple ; shell oblong- oval or 

 turrited, lips entire. 



Genus STRUTHIOLARIA, Lam. 



Shell oblong-oval ; spire elevated ; aperture with a very short 

 canal in front ; columella thickened, smooth, truncate anteriorly ; 

 outer lip thickened and sinuous. 



*S r . nodulosa, Lam. 



LOXOTREMA, Gabb, n.gen. Plate 14, fig. 21. 



Shell elongate, turrited, spire high; aperture with a very short 

 canal in front ; outer lip retreating above, sinuous below ; inner 

 lip heavily encrusted. 



L. turrita, nobis, n. species ; upper cretaceous of California. 



Genus PELICARIA, Gray. 



Shell elevated, turrited ; spire of adult covered with an ena- 

 mel coat ; aperture ovate ; outer lip sinuous, thin, inner lip en- 

 crusted. 



P. scutulata, Martyn. Recent. 



Genus HALIA, Risso. 



Shell thin, polished, oblong-oval, spire elevated, apex obtuse, 

 papillary; columella curved, truncate anteriorly ; outer lip thin, 

 simple, effuse, slightly sinuated anteriorly. 



H. priamus, Meusch. Recent. 



Appendix. 



Since the above was put in print, I have received from Mr. 

 Ralph Tate, of London, copies of his papers on the Cretaceous 

 Pterocera;, and on "the so-called Rostellarice of the Cretaceous" 

 of England, two papers to which I did not have access while 

 studying the subject. They were published in the Geological 



