IGt 



EXPLANATION OF THE PLATES. 



1. 



the breathing-tube or wind- 



pipe. 



c. c. the horns. 

 d.d. the foot. 



2. Valuta OUu^ with tlie anim.il. 



h. the breathing-tube, 

 f . c. the horns, with the eyes at 

 the base. 



d. d. the foot. 



3. Haliotis titberculata, with the 



animal. 



a. a. the horns. 



b. b. the columns supporting the 



eyes. 



c. part of the pallium, perhaps 



answering the purpose of 

 a windpipe. 



d. the foot, with two rows of 



fringes. 



4. Voliita glabella, with the animal. 



a. a. the horns. 



b. b. the eyes. 



c. the breatliing-tube. 



d. the foot. 



5. The under side of (ho animal of 



Valuta glabella. 



a. a. the horns. 



b. b. the eyes. 



c. the breathing-tube. 



d. the foot. 



e. the trunk and mouth. 



6. Trochus <es.?f'/«/?^s, with the ani- 



mal. 

 a. a. the horns. 



h. b. the columns supporting the 

 ey^s. 



Fig. 



6. c. a pointed bony hern, the use 



unJcnown. 

 d. d. d. three tentacula or arms simi- 

 lar to the horns a. a. ; it 

 has three on the other side 

 opposite to these : the use 

 unknown, 

 c. the operculum. 



7. Solen strigilalus var. 



a. b. the two tubes mentioned at 

 p. 13. 

 c. the foot. 



8. Cardium ringens. 



a. b. the two separate tubes. 



c. the foot. 



9. Ml/a Arenaria. 



a. b. the two conjoined tubes. 



Plate 11. 



10. Murex ramosus var. 



. a. the operculum. 



11. Valuta Olira. 



a. the mouth. 

 b.b. the horns. 

 c.c. the eyes. 



d. the breathing-tube. 



12. Turha littoreus. 



13. Pholas Dacti/lus. 



a. b. the two conjoined tubes. 

 c. the foot. 



14. Mure.TS Brandaris. 



15. Murex babi/lonius. 



16. Bulla Hydalis. 



17. Turbo Terebra. 



RICHARD AND ARTHUR TAYLOR, PRINTERS, 

 SHOE LANE, LONDON. 



Oarded 



