— 54 — 



calis 29 millim. remota) ; — supra recta usqiic ad 

 angulum sat acutum , dcin subabriipte recteque 

 descendente; antice superne angulata, deiii convexo- 

 decurrente ; infra arcuato-decurrente ac post verti- 

 calem valide convexa ; postice (regio postica in alti- 

 tudine ampla, duplicem anterioris fere attingeiis et 

 inferne usque ad 22 millim, post verticalem levitcr 

 crescens) in rostrum inferum, subacutc truncatulum, 

 attenuata; — umbonibus rotundato-inflatis, nihilo- 

 minus superne planulatis et marginem superum non 

 superantibus (nates peracutae) ; sulco dorsali sulculis 

 bene notatis distincte delimitato; area triangulari, 

 subcompressa ; cardine crassulo in tota longitudine 

 lamelliformi (lamella sat valida, crassula et subpro- 

 ducta) ; ligamento posteriori symphynoti ; lunella bre- 

 viter.triangulari. 



BRAZZJEA BRIDOUXI 



Long. max. 72; ait. max. 43; ait. vertic. 42; 

 crass. max. 33 ; basis apico-rostralis 55 ; intcrvallum 

 c natibus ad angulum 32, ex angulo ad rostrum 31, 

 c rostro ad verticalem 38 et e basi verticalis ad an- 

 gulum 46 ; regio antica 29, postica 45 millim. 



Concha irregulariter subangulato-oblonga, inflato- 

 ventrosa, sinuosa, postice angulosa, crassula, sub- 

 opacula, nitida, subtiliter striata (striœ ad margines 

 validiores) et superne circa et super nates eleganter 

 rugosa; violaceo-nigrescente, super umbones decolo- 

 rata ac castaneo-violacea ; intus unilbrmiter vinoso- 

 violacea; — valvis(l) crassulis, in ventre valvarum 



(I) Membraiia ala'l'ormis déficit. 



