^fr. A. Bell on (?ie Fnitna of the Upper Ttrtiaru's. 49 



*Di'schi(ies Olii'i, Scacchi (very rare). Ranges from Gas- 

 cony to Tenerirte and the Mediterranean Sea. 

 ■\*Dentalium dentdiis^ L. (inoderatt-ly edniiimn, but small). 

 H(i/). West Franee to the Canaries and the .Egean Sea. 



tiirentinuin^ Lam. 



* Chiton fascicular is J L. 



* (liscrepans, Bronn. Nearest habitat, Connvall. 



* 



marginatus^ Penn. 



t* siculusj Gray. Kangc, Cadiz to the ^"I'^gean Sea. 



Patella vuhjata^ L. 

 Tectura virginea, ^liill. 

 Fissiirella (jrcpca^ L. 



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



France and the Mediterranean Sea. 

 Trochus citierariuSy L. (abundant). 



* exa.fperatusj Pult. Sir 11. James records it from 



Wexford. 



lineafus, Da Costa. I only know it from Barnstaple. 



The Scotch localities are doubtful. 



maguSj 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. 



* striatus, L. (veiy rare). 



tumidus, Mont. 



umbilicatuSy Mont. 



ziziphimis, 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 pufeoli(s, Turton. 



pallidula, Da Costa. 



Littorina littorea^ L. 



ohtusata, L. 



neritoides^ L. 



rudisj L. All very common. 



• , var. nigroliyieafa, Phil. 



, „ saxatilis, Johnst. 



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



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



