4 Br. P. P. Carpenter on Pleistocene Fussils 



serichns, a sutnris sepsratis, spiram ascenrlcntibus ; t. arlnlfa, 

 costulis spiralibus, interdum iv., intercalantihus ; costulis ratliaiiti- 

 bus crebprrimis; costis suturalibus ii. validis, baud nodosis : basi 

 efi"ii>a, liris rirc. vi. ornata ; apertura subquadrata; labro labiuque 

 tenuibus ; columella vixtorsa, effusa, vix emargiiiata. 



Hab. Sta. Barbara, Pleistocene, 1 sp. {Jewel f). S. Pedro, 

 S. Diego {Cooper). 



The scul|)tare resembles Ccrithiopsis ', but the columella is 

 pinched, not notched. 



Opnlia {?crennfoides, var.) inscufpta. 



O. testa O rrp))nti>i(lei simili ; sed costis radiantibus pluribus, xiii.— 

 XVI., in spira validis ; ant'r. ult. obsolctis ; sculj)tiira spirali nulla ; 

 puuctis fiuturalilms minus impressis, circa fasciam basalem Isevem 

 postice, uoH antice coutinuis. 



Hab. Sta. Barbara, Pleistocene, 1 sp. {.Teivett). 



Vcrv closely related to O. crenatoides, now living at Cape 

 St. Lucas, and, with it, to the Portuguese O. crenata. It is 

 quite possible that the three forms had a common origin. 



Trophon temtisciilpfus. 



T. testa T. Barricensi simili, sed sculfitura minus cxtante ; vertice 

 nuclt'oso miuimu ; anfractibus uno et diniidio Isevibus, apice acute; 

 normalilius v., tuuiidis, postice sul)angulatis. suturis impres?is ; 

 costis radiantibus x.-xiv., plenmique xii., liRud varicof'is, nir<rustis, 

 obtusis ; liris spiralibus niiijoribu!*, distantibus, quarum ii.-iii. in 

 spira monstrautur, aliis intcrcalaiitibus, supra co^las ladiantes 

 undatim transcuntibus ; tota sujxificie lirulis incrrmcuti, ^upra 

 liras sjiiralcs scjuiuuosis, elegauter oniata ; canali longiore, sub- 

 recta, vix clausa ; labro acutiore, postice et iiitus iucras^.tto, dtuti- 

 bus circ. v. munito ; labio conspicuo, Isevi ; columella torsa. 



Hab. Sta. Barbara, Pleistocene formation {Jewett). 



This very elegant shell is like the least-sculptured forms of 

 T. Barviccnsis, from which it appears to differ in its extremely 

 small nucleus. It is very closely related to T.jinibriatu'us, A. Ad., 

 from Japan, but differs ii '<xture, and is regarded by Mr. Adams 

 as distinct. It stands on the confines of the _ lus, there bt;iug 

 a slight columellar twist, as in Peridenda, 



Pisania fortis. 



P. testa P. insiffni simili, sed solidiore; crnssissimn, sculptura valde 

 impressa ; antr. iioim. v., paium roluiidatis, suturis distinctis; 

 costis radiantibus t. juuiore circ. xii., obtusis, parum ex|)ressis, 

 postea obsoletis ; liris ^pirnlibus validis, crebris (((uaruni t. juniore 

 v., postea X., in spira mouslrautur), subeequahbus, auticis niajuii- 



324 



