Mr. A. Bell on the Fauna of the Upper Tertiaries. 49 



^ Dischides Olivi^ Scacchi (very rare). Ranges from Gras- 

 cony to Teneriffe and the Mediterranean Sea. 

 '\'^DentaUum dentalis, L. (moderately common, but small). 

 Hah. West France to the Canaries and the ^gean Sea. 



tarentinum^ Lam. 



* Chiton fascicularis^ L. 



* discrepans, Bronn. Nearest habitat, Cornwall. 



* marginatuSy Penn. 



t* siculuSj Gray. Range, Cadiz to the -/Egean Sea. 



Patella vulgata^ L. 

 Tectura virginea^ Miill. 

 Fissurella groeca^ L. 



t* costaria^ Grat. (=-F. neglecta^ Desh.). Range: South 



France and the Mediterranean Sea. 

 Trochus cinerarius^ L. (abundant). 



* exasperatusj Pult. Sir H. James records it from 



Wexford. 



lineatuSj Da Costa. I only know it from Barnstaple. 



The Scotch localities are doubtful. 



magus, L. Adult shells scarce, young shells plentiful. 



I have not met with a description of the young shell, 

 which loses some of its characters as it approaches matu- 

 rity, and therefore give one : — 



Shell depressed ; whorls 4-5, flatly convex, with close- 

 set spiral ridges, the two at the base of each whorl being 

 stronger than the others, and forming a deep suture as it 

 increases in size, the whole intersected by fine striae, 

 which are more developed between the ridges, and most 

 of all so within the two just referred to. The interior is 

 nacreous, and the umbilicus small. 



striatusj L. (very rare). 

 tumidus, Mont. 

 umbilicatus, Mont. 

 ziziphinusj L. 



^Fhasianella pullus, L. I have seen it in an Irish deposit, 

 but from no other English formation than at Selsey ; 

 very plentiful and bright-coloured. 



Lacuna puteolus, Turton. 



pallidula, Da Costa. 



Littorina littorea, L. 



ohtusata, L. 



neritoides, L. 



rudis, L. All very common. 



, var. nigroUneata, Phil. 



, „ saxatilis, Johnst. 



, ,, tenebrosaj Mont. The colour in this va- 



Ann. & Mag. N. Hist. Ser. 4. Vol. viii. 4 



