jrom Sta. Barbara, Califorma. 277 
seriebus, a suturis separatis, spiram ascendentibus; t. adulta, 
costulis spiralibus, interdum iv., intercalantibus ; costulis radianti- 
bus creberrimis; costis suturalibus ii. validis, haud nodosis; basi 
effusa, liris cire. vi. ornata; apertura subquadrata; labro labioque 
tenuibus; columella vix torsa, effusa, vix emarginata. 
Hab. Sta. Barbara, Pleistocene, 1 sp. (Jewett). 8S. Pedro, 
S. Diego (Cooper). 
The sculpture resembles Ceriiiiopsis; but the columella is 
pinched, not notched. 
Opalia (?crenatoides, var.) insculpta. 
O. testa O. crenatoidei simili; sed costis radiantibus pluribus, xii.— 
xvi., in spira validis; anfr. ult. obsoletis ; sculptura spirali nulla ; 
punctis suturalibus minus impressis, circa fasciam basalem leevem 
postice, non antice continuis. 
Hab. Sta. Barbara, Pleistocene, 1 sp. (Jewett). 
Very 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 tenuisculptus. 
T. testa 7. Barvicensi simili, sed sculptura minus extante; vertice 
nucleoso minimo ; anfractibus uno et dimidio lzevibus, apice acuto ; 
normalibus v., tumidis, postice subangulatis, suturis impressis ; 
costis radiantibus x.—xiv., plerumque xil., haud varicosis, angustis, 
obtusis ; liris spiralibus majoribus, distantibus, quarum 11.11. in 
spira monstrantur, aliis interca‘antibus, supra costas radiantes 
undatim transeuntibus; tota superficie lirulis inerementi, supra 
liras spirales squamosis, eleganter ornata; canali longiore, sub- 
recta, vix clausa; labro acutiore, postice et imtus incrassato, denti- 
bus cire. v. munito; labio conspicuo, levi; columeila torsa. 
Hab. Sta. Barbara, Pleistocene formation (Jewett). 
This very elegant shell is like the least-sculptured forms of 
T. Barvicensis, trom which it appears to differ in its extremely 
small nucleus. It is very closely related to 7. fimbriatulus, A. Ad., 
from Japan, but differs in texture, and is regarded by Mr. Adams 
as distinct. It stands on the confines of the genus, there being 
a slight columellar twist, as in Peristernia. 
Pisamia fortis. 
P. testa P. insigni simili, sed solidiore; crassissima, sculptura valde 
impressa ; anfr. norm. v., parum rotundatis, suturis distinctis ; 
costis radiantibus t. juniore circ. xii., obtusis, parum expressis, 
postea obsoletis; liris spiralibus validis, crebris (quarum t. juniore 
v., postea X., in spira monstrantur), subzequalibus, anticis majori- 
