50 PALAEONTOLOGY OF CALIFORNIA. 



Not rare in the Pliocene of San Fernando ; collected by Messrs. Brown, Peck- 

 ham, and others. 



According to the common usage, that of adopting the oldest name since the 

 date of Linn. Syst. Nat. 10 Ed., the name Sinum of Bolton, will have to be used 

 for this genus, having a year of precedence over Sigaretus. It is unfortunate that 

 we are obliged to drop names so familiar as the latter, though, if we do not follow 

 some such rigid rule, it is impossible to tell where the diversity of opinions will 

 take authors in the choice of generic names. Klein's name of Catinus, which has 

 been used by Adams, Conrad, and others, dates back to 1753, but there are other 

 older names, and a growing tendency is developing itself to use the oldest name 

 that can be ferreted out, even if the author was not strictly binominal. 



CANCELLAEIA, Lam. 



C. gracilior, Cpr. (in lit.) n. s. 



" C. t. elongata, gracili, elegantissima; anfr. nueleosis ii, ma- 

 joribus, valde declivibus, laevibus, apice immerso; norm, v tu- 

 roentibus, superne vix subaugulatis, suturis valde impressis; 

 costis radiantibus x rotundatis, ad basim obsoletis, interstitiis 

 uudatis, majoribus; lirulis spiralibus exiguis, subdistantibus, 

 supra costes et interstitia eleganter transeuntibus, postice ii mi- 

 noribus, in medio primum iii, postea vi crebrioribus, circa basim 

 attenuatam vi lineis distantibus; apertura subquadrata, antice 

 dilatata; labro acuto; labio inconspicuo; colnmello plicis ii mi- 

 noribus, declivibus, antice tort£, plicse tertise simulante, sed vix 

 emarginata." 



" Long. .35, long. spir. .21, lat. .16, div. 38°." 



" Hab. Santa Barbara, Post-Pliocene. Of this extremely elegant species, two 

 specimens were found by Mr. Gabb, of which one is very perfect. It greatly re- 

 sembles C. modesta from Neeah Bay, but is much more slender. The nucleus is 

 chrysodermoid, very slanting, with sunken spire." 



C. ALTISPIRA, 11. S. 

 PI. 14, Fig. 7. 



Shell thick, robust, broadly fusiform; spire high, nearly as 

 loug as the aperture; whorls six or seven (?, — apex broken), augu- 



