DENTALIUM.— Plate II. 



Species 11. (ilus. Taylor.) 

 Dentalium sexcostatuji. Ben. testa alba, elongatd, 

 angustd, valide arcuatd ; costis validis, sex longitudi- 

 nalibus rotmulis, t:rams, laqueata ; interstitiis 

 profundis, siriatis ; apice integro. 

 The si.x-uibbed Dentalium. Shell white, elongated, 

 narrow, strongly curved ; Huted with six longitu- 

 dinal, strong, rounded, thick ribs ; interstices 

 deep, rounded; apex entire. 

 SowEKuy. Thesaurus Conchylioruni, Sp. 44. 

 Hab. — ? 



Differing from Dentalium lu'.raijonuia in the thick- 

 ness and roundness of the ribs, and tlie depth and 

 striation of tlie interstices. 



Species \-l. (Mus. Brit.) 



Dentalium octogonum. Den. te.<:td alba, crassd, 

 loevigatd, costis validis rdtiiiidis ado laqueata, 

 angusta, leviter arcuala : iiiti/rsti/iis latis, longitudi- 

 naliter siriatis. 



The eight-sided Dental iim. Shell white, tliick, 

 smooth, Huted with eight strong rounded ribs, 

 narrow, shghtly arched; interstices wide, longitu- 

 dinally striated. 



Lamarck. Auim. s. vert. 



Hab. China. 



