158 PROCEEDINGS OF THE CALIFORNIA 



Long. 0.18, long. spir. 0.12, lat. 0.19, div. 87°. 



Hab. Santa Barbara, in kelp-root, 2, dead ; Catalina Island, 8-10 fms. 20, 

 some alive ; Monterey, 20 fms. 4, dead. 



This shell might be taken for a delicate form of Gibbula parciptcta, which in 

 painting it exactly resembles. It is known from the Vancouver M. lirulata by 

 the three sharp keels on the spire, between which there are no others intercalat- 

 ing, and by the details of sculpture. The patches of color are very variable, 

 sometimes scarcely appearing ; and are generally deeper tinted on the keels, 

 giving a false appearance of granulation. 



Margarita salmonea Carp. (? var.) State Collection, Species 352. 



M. t. inter M. undulatcc et M. pupillce. intermedia ; minore, spira satis ele- 

 vata ; anfr. nucl. iii. purpureis ; dein iv. normalibus, colore salmoneo ; liris spirali- 

 bus in spira viii., quarum ii. suturales, minima? ; suturis haud undulatis ; interstitiis 

 a lineis incrementi creberrimis, haud elevatis, sculptis ; basi lirulis creberrimis, 

 gequalibus, circ. xviii. ornata ; apertura subquadrata ; umbilico minore, angu- 

 lato : operculo teouissimo, diaphano, anfr. circ. x. vix definitis. 



Long. 0.22, long. spir. 0.14, lat. 0.22, div. 80°. 



Hab. Monterey, 6-20 fms. 5, alive ; Catalina Island, 30-40 fms. 2, alive. 



This shell differs from the common Margarita of the Vancouver district 

 (M. papilla G\A.=calliostoma A. Ad.), in its much deeper and salmon-tinted 

 hue ; its finer sculpture, absence of decussation, and want of distant lirse round 

 the umbilicus. From the Norwegian specimens of M. undulata it is known 

 by the absence of sutural waves, and by the finer basal riblets, of which the 

 interstices are minutely sculptured across. The operculum differs from both, in 

 its great thinness and smoothness. Additional specimens may better display 

 its true relations.* 



Liotia Gray, 1842. 



Liotia fenestrata Carp. n. sp. State Collection, Species 1006. 



L. t. parva, primum subdiscoidea, postea variante, albido-ciuerea ; anfr. nucl. 

 laevibus, planatis, apice depresso ; anfr. norm. ii. et dimidio, convexis ; clathris 

 validis distantibus circ. xv. radiantibus, et vii. spiralibus, subrequantibus, con- 

 spicue fenestrata ; apertura circulari, ssepius plus minusve declivi, parieti vix 

 attingente ; umbilico maximo, anfractus monstrante ; labio, regione umbilicari, 

 sinuato. 



Long. 0.09, long. spir. 0.04, lat. 0.12, div. 170°. 



Hab. Catalina Island ; beach to 40 fms. 20, dead. 



This strongly sculptured species varies greatly (in the two specimens sent to 

 the Smithsonian Institution), in the declivity of the mouth and consequent size 

 of the umbilicus, where the labium is, as it were, scooped out. 



* Specimens from Monterey, and one from the beach of the Farallone Islands, are inter- 

 mediate between that described by Mr. Carpenter (Catalina Island specimen) and the 

 northern M. jjupilla. J. G. Coopeb. 



