— 30 ~ 



lares, limbo postice altiores ibique singula serie denti- 

 culorum crebrorum , acutorum, obliquorum undique 

 ad margines testae scabrae. Margo posticus paiülo 

 acutins denticulatus. Cardo tenuis, dentibus lateralibus 

 brevibus autico vix longiore sed altiore. 



Alt. 21, long. 22, prof. 14 mm. 



Hab. Goree, loca sabulosa ad 10 — 15 m. 

 11. Crassatella Paeteli n. 



T. crassa, compressa, transversim triangulari-ovata , um- 

 bonibiis minimis, acutis, contiguis, antemedianis, ini- 

 quilateralis, latere antico regulariter fere semicircnlari, 

 postico rostrato-acnminato, basi postice subconcava et 

 apice breviter triincato; extus epidermide fusca vel 

 lutea, late piirpureo-radiata induta, radiis saepe macu- 

 liformibus; area lunulaque undis transversis purpureis 

 circumscriptae ; intus obscure fusca unicolor. Lunula 

 areaque fere aequales, impressae, elongato-lanceolatae, 

 bene circumscriptae. Costulae concentricae numerosae, 

 acutae, postice in parte rostrali cuneato-coraplanata 

 evanescentes. Cardo valvae dextrae dente cardinali 

 unico crasso, bifido et lateralibus, antico brevissimo, 

 postico longiore, sinistrae dentibus cardinalibus 2, an- 

 teriore crassiore armatus. Margo internus subtiliter 

 crenulatus. 



Alt. 18, long. 21^2, crass. O^g nioi- 



Hab. Goree, loca limosa ad 20 m. 



Literatur. 



Smith, Edgar A., an Account of the Land- and Freshioater 

 Mollusca collected during the voyage of the Challenger 

 from December 1872 to May 1876. — In Proc. Zool. 

 Soc. 1884, p. 258—281, pl. 22. 23. 

 Als neu beschrieben und abgebildet werden: Athoracophorus vir- 

 gatus p. 263 t. 22 f. 1, Admii-alitäts-lnseln ; — Helix (Geo- 



