238 MAZATI&N UNIVALVES 



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

 Jamaica. They are all of exquisite beauty. 



295. VlTRINELLA PANAMFNSIS, C. B. Ad. 



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

 quorum pane duo normales ; anfr. primis Icevibus, postea pente- 

 gonatis ; carind maxime prominente mx super suturam impres- 

 sam ; carina satis prominente in spird, alter a sub periplieriam ; 

 quartd minus prominente in basi, quintd umbilicum maximum 

 circumeunte ; supra et infra inter carinas clathratis, clatJiris 

 (circiter xxii .) subconcavis, interstitia quadrata, profundafor- 

 mantibus ; totd superficie et umbilico elegantissime spiraliter 

 striatd, striis clatJiris superantibus ; aperturd mx rotundatd, a 

 carinis angulatd, peritremati continuo, inter duas carinas anfr. 

 penult, attingente, labro sinuato, postice 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 striae. It is rather more elevated 

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

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

 Ha b. Panama ; 24 sp. in sand ; C. B. Adams. Mazatlan ; 



1 sp. off Spondylus ; Upool Col. 



Tablet 1146 contains the specimen. 



296. VlTEINELLA PAEVA, C. B. Ad. 



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

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

 versis instructd, plus minusve distantibus, xiii. ad xxii., a carinis 

 spiralibus decussatis ; anfractibus junioribus lavibus, postea 

 guadrigonatis ; carinis duabus mediis, distantibus ; anguld 

 tertidprope suturam, quartd regionem umbilicalem circumeunte; 

 jugojuxta suturam et cavitate inter jugum anfulamque subcon- 

 cavd instructd ; peritremati ab anfractu penultimo vix inter- 

 ruptd ; labio angulato, undulato, postice superante. 

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

 Vitrinella 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 



