ia MAZATLAN UNIVALVES 533 
Famity PHILINIDA. 
Genus SMARAGDINELLA, A. Ad. 
Voy. Samarang, App. p. 475 :—H. & A. Ad. Gen. vol. ii. p. 22. 
Linteria, A. Ad. in Sow. Thes. Conch. 1850.—Woodw. Man. 
Moll. p. 182. 
Glauconella, Gray, Fig. Moll. An. pt. iv. p. 95.—Phil. Handb. 
Conch. p. 230. 
Thecaphorus, Nutt. ms. 
692. SMARAGDINELLA THECAPHORA, (Wutt.) n. 8. 
S. t. axiniformi, solidd, viridi, radiis pluribus olivaceis, 
sublevt ; vertice juata trientem totius longitudinis; cameré 
solidissima, fulcro instructd ; labro postice valde producto, acute 
angulato ; inter cameram angulamque olivaceo-fuscd, sinu lato, 
haud profundo; camera valde extante, rotundatéd, excavata, 
extus aperiente ; labio haud reflexo ; cicatricibus muscularibus 
conspicuis. 
The excellent generic name given by Mr. Nuttall to the shell 
he found in the Sandwich Is. having unfortunately not been 
published, and therefore not being entitled to priority, it is 
here retained for a species differing considerably however from 
the Polynesian type. In the solitary Mazatlan shell, the 
chamber, instead of being a thin septum, not projecting, and 
winding spirally round inside, with a sharp, deep sutural sinus, 
becomes a solid spoon-shaped process, supported on a stout 
fulcrum from the inside, and looking remarkably like the liga- 
mental cavity of Anatinella, &c. This chamber is open to the 
outside, but not within, and is separated from the very sharply 
angled upper lip by a shallow darkly tinted sinus. The apex, 
close to the junction of the chamber, is situated at about one- 
third of the entire length. Zong. °078, lat. 055. 
Hab.—Mazatlan ; 1 fresh sp. on Spondylus; L’pool Col. 
» Tablet 2527 contains the specimen. 
