48 SEGUENZIA. 



S. RETICULATA, Phil. PL 8, figs. 84, 85. 



Umbilicated, trochiform, periphery acutely angulated, ele- 

 gantly granularly reticulated, base smooth, obsoletely cingulated 

 at the periphery. Diam. 2'5 mill. 



Portugal ; off Ascension I. ; West Indies. 



Fossil, pliocene of Calabria. 



It is Trochus (Solariella) Lusitanica, Fischer. 



S. LAXA, Jeffreys. PI. 8, figs. 86, 87. 



Shell consisting of scarcely two whorls, which are cylindrical 

 and scalariforra, regularly spirally striated ; mouth nearly de- 

 tached, quadrangular, a little produced at the base; umbilicus 

 narrow and deep. Length, 6 mill. 



Atlantic (Porcupine Exped.). 



Only a fragment obtained. Its generic position is very doubt- 

 ful. 



S. DELICATULA, Dall. (uiifigured). Gulf of Mexico. 



