MAZATLAN UNIVALVES 251 
differ from the typical species of that genus (1) in being fre- 
quently sculptured, (2) in the callus 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 the 
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 
sinall white shells described as Rotelle 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 PYRICALLOSA, 7. s. 
Hi. t. valde depressd, albidd, opaciore ; anfractibus iv. et 
dimidio, quarum tres primt leves sunt, suturd haud impressa ; 
striis spiralibus tenuibus, rugulisque incrementi tenuissimis 
elegantissime ornaté ; callositate opacd radiatim rugosa circa 
umbilicum parvum gyrante, juxta labium planatd, pyriforms s 
apertura subovatd, labro tenui, intus suturam viz callosd ; labio 
wn anfractu penultimo haud expanso. 
This extremely elegant and characteristic shell agrees with 
Vitrinella in the nature of the apex; but differs in the revoly- 
ing callus, which is not covered with the spiral strie, but 
radiately wrinkled ; at the aperture it is suddenly planed off, 
displaying a pyriform shape. Long. °019, lat.°047 by *037, 
div. 160°. 
Hab.—Mazatlan ; 1 sp. off Spondylus ; L’pool Col. 
Tablet 1169 contains the specimen. 
319. ETHALIA LIRULATA, 7. 8. 
E. t. depressd, alba, opacé; anfractibus iv. quarum primi 
leves sunt, suturé haud impressa; striis spiralibus tenuibus 
confertissimis ; callositate opacd, circa rimulam wumbilicalem 
gyrante, gucta labium planatd, lata, subtrigond ; apertura ob- 
ovali; labro tenw, infra suturam minime callosé ; labio in pariete 
nullo. 
Known from E. pyricallosa by the compact growth, close 
strie without transverse wrinkles, and short broad callus 
