ACADEMY OF NATURAL SCIENCES. 215 



Calliostoma gemmulatum, Cpr. Br. Assoc. Eep. 1863, pp. 612, 653. 



Syn. C.formosum, Cpr. Proc. Cal. Ac. 1864, 155 : non Forbes. 



"While the sheets of the Report were passing through the press, it was found 



that the name had been preoccupied by Forbes. As it happened the Califor- 



nian sheet was being printed simultaneously, and there was no time to make the 



alteration. 



Genus Ethalia, Adams. 



Ethalia supravallata, Cpr. n. s. 



E. t. parva, albida, nitente, subdiaphana, planata ; anfr. nucl. ii. et dimidio, 

 laevis, diaphauis ; norm, uno et dimidio, rotundatis ; postice carina valde extante, 

 et fossa concava contigua suturam tenus, supra spiram vix planatam ascendente ; 

 in medio basis rotundatae carina altera plus minusve extante ; inter eas. circa 

 peripheriam, lirulis radiantibus minimis, haud expressis, sub lente vix conspicuis ; 

 regione umbilicari parum concavo ; apertura circulari ; labro a carinis angu- 

 lato ; columella, valde callosa, porrecta ; callositate pyriformi regionem umbili- 

 carem circumambiente. 



Long. 0-03, long, spir. 0. (?) lat. 0-45, div. 180°. 



Hab. San Diego, Cooper, shell-washings. 



Typical among the Vitrinelloid Ethalia described in Maz. Cat., Nos. 310, 

 318. Remarkable for the small number of turns in the mature shell as com- 

 pared with the nucleus. 



Ethalia var. invallata, Cpr. 



E. t. "E. supravallatce," aliter exacte simili ; sed vallo spirali omnino carente ; 

 basi angulala, haud carinata. 



Hab. San Diego, shell-washings, Cooper. 



These shells would certainly have been regarded as distinct, but for one spec- 

 imen which began smoothly, yet after a fracture suddenly commenced a (not 

 prominent) keel : an instructive lesson on variations in sculpture. 



Genus Galerus, Humphreys. 

 Galerus contortus, Cpr. n. s. State Collection, No. 369. 



G. t. parva, tenui, albida ; vertice nucleoso planato, extante, minimo, anfr. 

 uno et dimidio planorbi-formibus, apice conspicuo ; clein conoidea, elevata, solute 

 spirali, suturis impressis ; superficie rudi, laminis incrementi interdum conspi- 

 cuis ; lamina interna. 



Long. 0-26, lat. 0-24, alt. 0-15, div. 80°. 



Hab. Monterey, 20-40 fm ; Santa Barbara, 16-20 fm ; Catalina Island, 

 30-40 fm. ; Cooper. 



The vertex stands out like a tiny Planorbis, and is more minute than in any 

 species I have examined. 



Genus Cecum, Fleming. 

 Cacum crebricinctum, Cpr. n. s. State Collection, No. 388. 

 C. (Anellum) t., quoad genus, magna, tereti, solidiore, rufofusca, interdum 



