— 500 — 



96. Trochus latior, Monterosato. 



Gabil's, 5,10, Djerba 4, KerkennahsS, Zarziss 12. — 

 Eponges. 



Var. albina, Monterosalo. 

 Eponges. 



97. Trochus varius, Linné. 

 Eponges. 



98. Trochus lurbinatîis, Born. 

 Djerba 4. 



99. Trochus articulalus, Lamarck. 

 Djerba 4. 



100. Trochus conulus, Linné. 

 Eponges. 



101. Trochus dubiiis, Philippi. 



Djerba 4, Sfax 9, Aghir H, Zarziss 12. — Eponges. 

 Var. albida. D'un blanc de lait uniforme. 

 Eponges. 



102. Trochus Laugieri, Payraudeau. 



Eponges. D'un brun olivâtre uniforme, quelquefois 

 flammuléde gris violacé. 



105. Trochus Gualtierianus,Vh\\\pT^\. 

 Eponges. 



104. Trochus exasperaluSf Pennanl. 



Eponges. 



Var. minor, rubra, Monterosato. 



Eponges. 



Var. excavata, Monlerosato. 



