240 THE PEOCEEDINGS OF THE LINNEAN SOCIETY 



derived from the lines of growth only. The shape of the shell is 



depressed and flat, and the teeth are namerous and very minutely 

 angular. It differs from all our living species. 



The above thirty species is rather less than half those collected 

 by me. I propose returning to the description of the rest in the 

 course of a month or so. The most of the figures are already 

 drawn on stone, and the diagnosis will receive my earliest leisure. 

 It will be observed that I do not touch on the MarginellidcB 

 which at present occupy the attention of Prof. Tate, who has 

 written a most interesting memoir upon them. 



Explanation of Plates 20 and 21. 

 Plate 20. 

 Fig. 1 . — Fusus funicula tus. 

 ,, 2. — Mangeli'i hideus. 

 „ 3. — Pleurotoma Samueli. 

 ,, 4. — Brtllia Trevorii. 

 „ 5. — Pleurot()7na Murndaliana. 

 „ 6. — Fisania tenuicostaia. 

 „ 7. — AnciUaria semiJcevis. 

 „ 8. — Turritella transenna. 

 „ 9. — Triforis Wilkinsonii. 

 „ 10. — Vaphnella gracillima. 

 „ 11. — Thalotia exigua. 

 „ 12. — I'riforis sulcata. 

 „ 13. — Turritella platijspira. 

 „ 14. — Gerithium cribarioides. 

 ,, 15. — Gerithium. aphe/ps. 



Plate 21. 

 Fig. 1. — Trochita turbinafa. 

 2. — Leda inconspicua. 

 3. — Lfda Huttoii.ii. 

 4i. — Tonatina involata. 

 6. — Liotia lamellosa. 

 6. — Adeorbis aster. 

 7. — Moriilea strigata. 

 8. — Naticn, Wintlei var. Hamiltonevsis. 

 9 . — A dear bis acuf icarin a ia . 

 10. — Solarium ivannonensis. *" 



11 — Solarium acutum, 

 12 . — Cancellaria varicifera, 

 13. — Nassa Tatei. 

 14. — Gonu8 lialjphii. 

 lb.— Triio7i Prattii. 



