142 ON THK LAND-SHELLS OF MENTON. [Feb. 1 7, 



A smaller commoner form from deposit A. 



Alt. 18i diam. 13^; apert. alt. 9, lat. 8 millim. 



Specimens from Cape Mortela, imbedded close to a H. parefiana. 



Var. ? PHYSETUM, Bourg. 



C. physetum, Bourg. Rev. & Mag. Zool. 18/5, = (7. siibelegans 

 Bourg. not Orb., Moll. Diluv. Paris, 1869, fide cl. Bourguignat. 



I feel no hesitation in uniting this form specifically to the pre- 

 ceding ; in doing so I by no means wish to imply that typical 

 C, lutetianum and C. physetum are not distinct, as I have had no 

 opportunities of studying the types of these shells from the original 

 figures. 



Alt. 18j, diam. 13| ; apert. alt. 8|, lat. (vix) 8 millim. 



A specimen from deposit B, nearest the living specimen from the 

 "Grand Mont," and consequently with the most globosely swollen 

 last whorl. 



Alt. 18^, diam. 13 ; apert. alt. 8j, lat. 71 millim. 



A much commoner form in all the deposits, with the last whorl 

 markedly less tumid. 



Alt. 101, diam. 12j ; apert. alt. 7^^, lat. 7- millim. 



The smallest form, found only in deposit A, not in the least like 

 C. elegans. 



EXPLANATION OF THE PLATES. 

 Plate XIII. 



Pig. 1. TestaceUa williamsiana, p. 101. 



2. Daudehardia isseliana, p. 102. 



3. Hyalina mentonica, p. 107. 



4. Pupa oblirjua, p. 126. 



5. hourgivignatiana, p. 127. 



6. , var. ^lagiosioma, p. 128. 



7. , var. priBclara, p. 129. 



8. jolyana, p. 129. 



9. austeniana, p. 130. 



Plate XIV. 



Fig. 1. Claimllia paulucciana, p. 132. 



2. Ferussacia gronoviana, p. 133. 



3. , var. abnor7nis, p. 134. 



4. Acme foliniana, p. 136. 



t5. , var. emaciata, p. 137. 



6. , var. pachy stoma, p. 137. 



7. Benea bourguignatiana, p. 138. 



8. Poviaiias hercultsi^s, p. 139. 



