238 MAZATLAN UNIVALVES 



time ; seven are only known from Panama, and four from 

 Jamaica. They are all of exquisite beauty. 



295. ViTRiNELLA Panamensis, C. B. Ad. 



V. t. subdiscoided, majore, solidiore, alba ; anfr. iv. et dimidio, 

 quarum pcene duo normales ; anfr. lynmis Icevibus, postea pente- 

 gonatis ; carina maxime prominente vix super sutiiram hnpres- 

 saw, ; carina satis prominente in spird, altera sub peripheriam ; 

 quartd mi)ius prominente in basi, quinfd iimbilicum inaximum 

 circwineunte ; supra et infra inter carinas clathratis, clathris 

 (circiter xxii.^ subconcavis, interstitta quadrata, profunda for^ 

 mantibus ; totd SKperficie et timbilico elegantissime spiraliter 

 striata, striis clathi'is superantibus ; aperturd vix o'otundatd, a 

 carinis angulatd, 23ei'itremati continue, inter duos carinas anfr. 

 penult, attingente, labro sinuato, 2Jostice expanso. 

 C. B. Ad. Pan. Shells, no. 263, pp. 187, 316. 



One very fine specimen only was found of this (for the genus) 

 large species, which has allowed of a description somewhat 

 more in detail than that of Prof. Adams, who did not note the 

 very characteristic spiral strife. It is rather more elevated 

 than V.parva, with an additional keel and deeper pits. Long. "03, 

 lat. -065 by '057, div. 160". 

 Sab. — Panama; 24 sp. in sand; C.B.Adams. — Mazatlan; 



1 sp. off Spoudylus ; L'pool Col, 



Tablet 1146 contains the specimen. 



296. VlTEINELLA PARVA, C. B. Ad. 



V. t. discoidali, spird planatd, anfractibus iv. et dimidio, 

 supra et infra monstrantibus ; clathris quadratis, solidis, trans- 

 versis instructd, x>lu^ minusve distantibus, xiii. ad xxii., a carinis 

 spiralibus decussatis ; anfractibus junioribus lcm)ibus, postea 

 quadrigonatis ; carinis duahus mediis, distantibus ; anguld 

 tertidprope suturam, quartd regionem rimbilicalem cireumeunte ; 

 jugojuxta suturam et cavitate inter jugum anqulamquc subcon- 

 cavd instructd; pcritremati ab anfractu penultimo vix inter- 

 ruptd ; labia angulato, undulato, postice superante. 



C. B. Ad. Pan. Shells, no. 264, pp. 187, 316. 

 Vitrinclla clathrata, P. P. C. Cat. Prov. 



The Panama shells in Cuming's collection have the transverse 

 bars much more numerous than those from Mazatlan, and 



