ZOOLOGY. 373 



MONOCEROS LAPILLOIDES. 



Purpura (Monoceros) lapilloides, CONR. Journal Acad. Phil. VII, p. 264, pi. 20, fig 18, 1837. 



Monoceros punctatum, GRAY, in Zool. Voyage of Blossom, 1839. REEVE C. I. pi. 1, f. 1, species 2, Jay Cat. No. 90G5. 

 Hob. Bay of San Pedro, Dr. Trask ; Santa Barbara, Nuttall. 



Yery different from the preceding species, as shown in our specimens, although Mr. Car 

 penter is inclined to consider them, with M. brevidens, Conr., as three varieties of the same. 

 The published figures represent, it is true, what might be regarded as intermediate states of 

 one species. 



COLUMBELLA GAUSAPATA. 



Columbella gausapala, GOULD, Proceed. Bost. Soc. Nat. Hist., Ill, p. 170, June, 1850. IDEM, U. S. Expl. Exped. 



Mol. & Shells, p. 369. Atlas, fig. 837, Carp. Eep. p. 341. 

 Hob. Oregon, Gould ; Straits of de Fuca, Dr. Suckley. 



COLUMBELLA VALGA. 



Columbella valga, GOULD, Proceed. Bost. Soc. Ill, p. 169. IDEM, Exped. Shells, p. 269. Atlas, pi. 6, 338. 

 Hub. Straits of de Fuca, Dr. Suckley. 



The specimens sent of these two species were few and imperfect. 



Family NATICID^l. 

 NATICA LEWISII. 



Natica lewisii, GOULD, in Proceedings Bost. Soc. II, p. 239, 1847. ID. in U. S. Expl. Exped. Mollusca & Shells. 

 Nalica herculea, MIDDENDORFF, Beitrage Mai. Ross, II, p. 97, pi. vii, f. 6-7, 1849. 

 Natica herculea, CARPENTER, Rep. to Brit. Assoc. 1856, p. 336. 

 Nalica Itwi&ii, CARPENTER, Rep. to Brit. Assoc. 1856, p. 336. 

 Hob. Puget Sound, Washington Territory, Dr. J. G. Cooper, Dr. G. Suckley ; Bodega bay, Cal , Middendorff. 



This fine large species, the western analogue of our N. lieros, varies considerably in form, 

 being sometimes remarkably globose, and at others with the spire much produced. Mr. Car 

 penter has erred in assigning the priority to Middendorff s name, his second volume, which 

 contains the shells, being dated two years after Dr. Gould s publication. The name of the first 

 explorer and collector in Oregon merited such a perpetuation. 



This large shell is abundant throughout the northwest sounds, and is collected in great 

 numbers by the Indians for food. From May to August it may be found crawling out above 

 high -water mark to deposit its eggs, which are enclosed in a curious structure of sand, shaped 

 like a shallow bowl without a bottom, or still more like some glass lamp shades, and beautifully 

 symmetrical, smooth, and perfect on both sides.&quot; J. G. C. 



Family CEEITHIAD^E. 

 POTAMIS PULLATUS. 



Potamis pullatus, GOULD, in App. to Report of Explorations in California, vol. V, p. 333, pi. xi, f. 23, 24. 

 CerithidcE pullaia, CARP. Rep. to Brit. Assoc. 1856, p. 325. 

 Hob. Upper California, Dr. Trask. 



This species, which occurs in several localities on the coast of California, appears to vary in 

 the number of varices, relative length, and other minor particulars. 



