220 PROCEEDINGS OP THE CALIFORNIA 



elongatam, rotundatam continuis ; interstitiis lirulis acutis distantibus, baud 

 extantibus, circ. x. decussatis, quarum iv. v. in spira moustrantur ; aperture 

 ovali, peritremati vix continuo ; plica parietem tenus acuta, baud celata, 

 declivi. 



Long. 0-06, long. spir. 0-03, lat. 0-025, div. 12°. 



Hab. S. Pedro. Cooper. 



One specimen and a few fragments were found in tbe sbell-washings of Dr. 

 Palmer's consignment. Differs from Chr. ovulum, in its slender sbape and deli- 

 cate spiral sculpture. 



Chrymttida cincta, Cpr. n. s. 



Chr. t. satis regulari, alba, marginibus spirse vix excurvatis ; vert. nucl. 

 parvo, celato, dimidium truncationis vix superante ; anfr. norm. iv. parum ex- 

 curvatis, suturis distinctis ; costis spiralibus obtusis circ. x, cincta, quarum iv. 

 in spira monstrantur ; costis iii. posticis radiatim subgranulosis, seriebus circ. 

 xv.. marginibus spiras utrinque parallelis, supra quartam subobsoletis ; intersti- 

 tiis latis, delicatim decussatis ; basi satis prolongata ; columella antice valde 

 efFusa ; plica parva, mediana. 



Long. 0-11, long. spir. 0-07, lat. 0-05, div. 35°. 



Hab. Santa Barbara group of islands. Cooper. 



The solitary specimen is probably immature. Intermediate between Chrysal- 

 lida proper and Mumiola. 



Genus Chemnitzia, D'Orbigny. 

 Chemnitzia chocolata. Cpr. n. s. State Collection, No. 428. 



Ch. t. "C. tridentatce " magnitudine et indole simili ; sed teretiore, dense cas- 

 tanea, fasciis pallidioribus sub epidermide adhaerente ornata ; anfr. primis gra- 

 cillimis; vert. nucl. anfr. iii, helicoideis, valde decliviter sito, marginibus spiral 

 rectis, angustis, haud superante ; anfr. norm. xii. planatis, primis tumidioribus, 

 suturis impressis; costis circ. xxviii. rotundatis, validis, circa basim prolongatam 

 haud subito evanidis, anfr. ult. saepe obsoletis ; interstitiis haud asquantibus, 

 haud undatis, haud sulcatis ; tota superficie sub lente minutissirae et creberrime 

 spiraliter striulata ; apertura ovali, columella parum contorta, labro intus tenui, 

 haud dentato. 



Long. 0-55, long. spir. 0-43, lat. 0-13, div. 17°. 



Hab. S. Pedro, S. Diego, Monterey ; rare. Cooper. 



One specimen, in Dr. Palmer's consignment, is known from Ch. tridentata by 

 the very effuse spire, prolonged base, and crowded ribs without waved sculpture 

 between. 



Chemnitzia subcuspidata, Cpr. State Collection, No. 670, a. . 



Ch. t. parva, minus tereti, cerinS, seu purpureo-fusca ; anfr. nucl. ii. et 

 dimidio, valde decliviter sitis, marginibus spirse parum excurvatis superantibus ; 

 norm. viii. planatis, suturis excavatis ; costis radiantibus circ. xviii. acutis, circa 

 basim prolongatam vix continuis, ad suturas valde elevatis, subcuspidatis ; inter- 



