222 FISSURELLIDiE. 



5. decussata (f. 12), A. Adams. — Elongato-ovalis, albida, 

 planulata, dorso carinata, costellis longitudinalibus, radiantibus,' 



et lineis elevatis concentricis eleganter clathrata, vertice acuto, 

 postico ; aperture margine crenulato, antice sinuato, sirni intus 

 in canalem producto. Obs. With a regularly cancellated sculp- 

 ture and a keel from the anterior margin to the apex. 



6. cicatrosa (f. 14), A. Adams. — Elongato-ovalis, alba, dorso 

 valde depressa, costellis radiantibus et lineis concentricis elevatis 

 decussata, vertice subpostico depresso excavato cpjasi cicatricoso, 

 subpellucido, basi arcuata ; apertune margine crenulato, extre- 

 mitate anteriore sinuata, sinu intus in canalem producto. Obs. 

 The sinus and cicatrix as in T. carinata, but the shell flat and 

 strongly cancellated. 



7. scutellaris (f. 8, 9), A. Adams. — Elongato-ovalis, virido- 

 fusca, tennis, dorso planulata, vertice portico, acuto, vix elevato, 

 costellis radiantibus subdistantibus, et striis concentricis incre- 

 ment decussata; extremitate anteriore vix sinuato; apertura intus 

 fusca, margine crenulato. 



