MAZATLAN TJNI VALVES 251 



differ from the typical species of that genus (1) in being fre- 

 quently sculptured, (2) in the caUus winding round, generally 

 not covering the umbilicus, (3) in the outside of the callus not 

 being glossy, but having a glossy portion scooped out near tTie 

 columella. The labium is generally not reflected over the 

 body whirl. They appear to retain permanently the young 

 state of Teinostoma. At the same time, the specimens examin- 

 ed were so few (only 9 of 5 species) and some of these were 

 to such an extent intermediate between other groups, that it 

 is impossible to designate them with confidence. Some of the 

 small white shells described as Rotellse are probably referable 

 to this form. Mr. Cuming states that the species he found 

 were deep water shells, while the true Globuli are Littoral. 



318. Ethalia pteicallosa, n. s. 



E. t. valde depressd, albidd, opaciore ; anfractibus iv. ei 

 dimidio, quarum tres pritni Iceves sunt, suturd hand impressd; 

 striis spiralibus tenuibus, rugiclisque incrementi tenuissimis 

 elegantissime ornatd ; callositate opacd radiatim rugosd circa 

 umbilicum parvuin gyrante,juxta labium 2^lanatd, pi/rijhrmi f 

 aperturd subovatd, lahro tenui, intus suturam vix callosd ; labio 

 tn anfractu penultimo liaud expanso. 



This extremely elegant and characteristic shell agrees with 

 VitrineUa in the nature of the apex ; but differs in the revolv- 

 ing callus, which is not covered with the spiral strise, but 

 radiately wrinkled ; at the aperture it is suddenly planed off, 

 displaying a pyriform shape. Long. "019, lat. "047 bv '037, 

 div. 160". 

 Hab. — Mazatlan ; 1 sp. off Spondylus ; L'pool Col. 



Tablet 11G9 contains the specimen. 



319. Ethalia lirulata, n. s, 



E. t. depressd, albd, opacd ; anfractibus iv. quarum primi 

 IcRves sunt, suturd hand impressd ; striis spiralibus tenuibus 

 confertissimis ; callositate opacd, circa rimulam umbilicalem 

 gyrante, juxta labium planatd, latd, subtrigond ; aperturd ob- 

 ovali; labro tenui, infra suturam minime callosd ; labio inpariete 

 nulla . 



Known from E. pyricaUosa by the compact growth, close 

 stria) without transverse wrinkles, and short broad callus 



