360 KAZATLAN tTNIVALVES 



414. Alvania tumida, n. s. 



A. t. ventricosA, alho-fuscd, solidd ; anfr. v. tumentibus, 

 subcBqualiter cancellatis ; costis haud ohtusis circitey xxii. traii'S- 

 versis, a liris sinralihus intersectis, nodosis ; Uris vii., quarum 

 iii. spiram tratiseunt, una ii?nbilicuni satis magnum definat ; 

 interstitiis quadrat is ; aperturd subrotundatd, labro varicoso, 

 labio teiiuioi'e. 



Differs from all varieties of A. excurvata in its very tumid 

 groTrtk, Timbilicated base, and tbickened lip. Lvng. "057, 

 long. spir. '034, lat. -033, div. 40". 



Sab. — Mazatlan ; 2 dead sp. off Spoudjdus ; L'pool Col. 



Tablet 1711 contains one specimen. 



415. ? Alvania , sp, ind. 



Tablet 1712 contains a wbite, rather solid sbell, with very 

 tumid whirls and a round mouth. It might pass for a Scalaria, 

 but has no ribs ; or for an Aclis, but the apex is dextral. One 

 whirl has perished; the remaining seven measure long. '048, 

 long. S2)ir. '03, lat. '027, div. 30". 

 Sab. — Mazatlan ; 1 sp. off Chama ; L'pool Col. 



Genus CIN'GULA, Flem. 

 S.Sf A. Ad. Gen. vol. i. p. 334.— Cingula, pars, C. B. Ad. 



416. ? Cingula , sp. ind. 



Tablet 1713 contains a short, broad, white, smooth, rather 

 solid shell, with flattened whirls, of Odostomoid appearance ; 

 but the apex appears dextral. The peritreme is continuous 

 and not plaited. It has five whirls, and measures long. '053, 

 long. spir. "03, lat. '033, div. 43". 

 Sab — Ma^atlau ; 1 sp, off Chama ; L'pool Col. 



Genus HYDEOBIA, Sartm. 



Sturm, Deutsch. Faun. vi. 5, p. 47, 1821. — Phil. Sand. Conch. 



p. 168.— fit Sf A. Ad. Gen. vol. i. p. 385. 

 Leachia, iBmo, 1826.— raludestrina,Z)'0r5. 1840.— Paludinella. 



Lov. Midd. (? = Paludinella, Pfr.) 

 Eissoa, pars, auct. 



