SOLEN. 129 



from the apex to different parts of the margin. It is 

 marked within, the same as on the outside, and has 

 two teeth in each valve, with a strong, white, depressed 

 rib, running obliquely across the shell. It is some- 

 times found with two white rays instead of four. Large 

 specimens measure four inches from end to end. 



Inhabits the Indian Ocean, and is found at Amboyna. 



GUINEA RAZOR. 



15. Solen Guineensis. S. testa alba, glabra, subpellucida, ventricosa, 



utrinque hiante. 

 Shell white, smooth, subpellucid, ventricose, gaping at both ends. 

 Chem. Conch. 11. pi. 198. f. 1937. 



This shell is described only by Chemnitz. It is 

 strong, smooth, and white, and resembles Adanson's 

 Tagal, tab. 19. f. 1., but seems to be a thicker shell, with 

 a broad hinge, and a strong rib running across the 

 inside. The teeth are not visible in the figure repre- 

 sented by Chemnitz. 



Inhabits the coast of Guinea. 



LARGEST RAZOR. 

 PI. 31./. 3. 



16. Solen maximus. S. testa lineari-ovali, alba, subdiaphana, utrinque 

 hiante et rotundata ; intus costa transversali a cardine ad marginem 

 decurrente. 



Shell linear oval, white, subdiaphanous, gaping, and rounded at both ends ; 

 a transversal rib within, running from hinge to margin. 



This is a flat, white shell, covered with a yellowish- 

 green epidermis, striated concentrically, and very 

 glossy. From the hinge, which has two teeth in one 



VOL. I. K 



