ACADEMY OP NATURAL SCIENCES. 159 



Liotia acuticostata Carp. n. sp. State Collection, Species 519 a. 



L. t. parva, subglobosa, alba ; aufr. nucl. ii. laevibus, apice satis extante ; 

 anfr. normalibus iii., carinis in spira maxime extautibus ii., anfr. ult. vi. ; suturis 

 subrectangulatis ; apertura circulari ; labro extus parum contracto ; labio 

 conspicuo ; umbilico baud magno. 



Long. 0.12, long. spir. 0.06, lat. 0.10, div. 95°. 



Hab. Catalina Island, 10-20 frns. 4, alive ; Monterey, 4, dead, dredged? 



This pretty little Cyclostomoid species is easily recognized by the sharp 

 revolving keels, and absence of radiating sculpture. 



Amycla H. & A. Adams, 1858. 

 Amycla undata Carp. n. sp. State Collection, Species 1067. 



A. t. parva, rufo-fusca, turrita, epidermide tenui iuduta ; marginibus spirae 

 subrectis ; anfr. nucleosis iv. laevibus, tumidis, apice mamillato ; anfr. normalibus 

 v. valde tumidis, suturis impressis ; costis radiantibus ix. valde tumidis, latis, 

 antice et postice obsoletis ; interstitiis undatis ; liris spiralibus acutioribus, dis- 

 tantibus, costas superantibus, secundum interstitia eleganter undulatis, quarum 

 vi.-viii. in spira raonstrantur ; apertura ovali, in canalem brevem rectaru pro- 

 ducts, intus baud lirata ; labro acuto, labio acuto extanti ad suturam juncto ; 

 columella planata : operculo nassoideo. ? 



Long. 0.44, long. spir. 0.20, lat. 0.20, div. 45°. 



Hab. Catalina Island, not rare, 30-40 fm. 10, some alive. 



The nuclear whirls in this shell resemble a minute Paludina. The only 

 operculum in the specimens sent was broken in extraction, but appeared to be 

 Nassoid. The sculpture consists of elongate knobs swelling in the middle ; 

 with spiral lines hanging as it were from pier to pier, as in a suspension bridge. 

 The aperture is somewhat Columbelloid, the inner and outer lips joining at the 

 suture ; but neither are lirate within, although they have that appearance from 

 the outside sculpture showing through. 



Regular Meeting, July 18th, 1864. 

 President in the Chair. 



Nine members present. 



Donation to the Cabinet : Specimens of native Sulphur from San 

 Buenaventura, by Mr. Spence. 



Donations to the Library : Annual Report of Harvard College, 

 Mass. Report of the Insane Asylum of California. Prospectus 

 of the Santa Clara College. Proceedings of the Essex Institute, 

 Vol. 4, No. 1. American Journal of Science and Arts, May, 



