MAZATLAN UNIVALVES 533 



FAMILY PHILINID^E. 

 GENUS SMABAGDESTELLA, A. Ad. 



Voy. Samarang, App. p. 475 : H. fy A. Ad. Gen. vol. ii. p. 22. 

 Linteria, A. Ad. in Sow. TJies. 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. SMAEAGDINELLA THECAPHOBA, (Nutt.) n. s. 



8. t. axiniformi, solidd, viridi, radiis pluribus olivaceis, 

 sublcevi ; vertice juxta trientem totius longltudinis ; camera 

 solidissimd,fulcro instructd; labro postice valde producto, acute 

 angulato ; inter cameram angulamque olivaceo-fuscd, sinu lato, 

 haud profundo ; camerd valde extante, rotundatd t excavata, 

 extus aperiente ; labio haud reflexo ; cicatricibus muscularibus 

 conspicuis. 



The excellent generic name given by Mr. ISTuttaU. 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 i aside, 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. Long. '078, lot. '055. 



Sab. Mazatlan ; 1 fresh sp. on Spondylus ; I/pool CoL 

 Tablet 2527 contains the specimen. 



