306 



EXPLANATION OF THE PLATES. 



PIQUEK. PAGK. 



51. Patella vulgata, Linn. Keferstein, t. 74, f. 21. . . 266 



52. Chiton Stelleri, Midd. Keferstein, t. 74, f. 23, . . 266 



53. Pneumodermon violaceum, d'Orb. Troschel, i, t. 3,f. 11. 



Blind sack opened, showing the stylet, . . . 267 



54. Pneumodermon Peronii, Lam. Section of stylet. 



Troschel, i, t. 3, f. 15, 267 



55. Hyalea tridentata, Gmelin. Troschel, i, t. 2, f, 17, . 267 



Plate 13. 

 Lingual Dentition. 



56. Glandina truncata. Say. Binney L. & P. W. Shells, 



266 



. 266 



94, 266 



. 266 



Fischer's Manuel, 



94, 266 

 . 266 

 . 266 

 . 266 



PI. 1, f. 2, . 



57. Glandina truncata, tongue. Binney, f. 1, 



58. Orthalicus zebra, Miill., jaw. Binney, f. 367, 



59. Helix appressa, Say. Binney, f. 215, 



60. Balimus cantagallanus. Rang., jaw. 



f. 31, . 



61. Limax flavus, Linn. Binney, f. 105, 



62. " '• jaw. Binney, f. 103, 



63. Succinea ovalis, Gould., jaw. Binney, f. 457 



64. Limnyea stagnalis, Linn. Binney, L. & F 



Pt. 2, f. 32, 



65. Limnaja columella, Say. Binney, L. & P. 



Pt. 2, f. 26. ...'.-. 



66. Limn^a stagnalis, Linn, a, superior jaw; 6, 



(Fischer), ...... 



67. Alexia m3'osotis, Drap. Binney, L. & F. 



Pt. 2,fig. 1, 



68. Tornatella fasciata. Lam. Troschel, ii, t. 14, f. 12. 



69. Doris obvelata, Miill. Keferstein, t. 50, f. 8. 



70. Runcina Hancocki, Forbes. Keferstein, t. 50, f. 11 



W. Shells, 



W. Shell's, 



lateral jaws. 



W. Shells, 



266 



266 



266 



266 

 267 



267 

 267 



Plate 14. 



71 



105 



Digestive tube of Dentalium Tarentinum, Lam. (After 

 Lacaze-Duthiers.) a&, buccal pouches ; 6, labial palpi ; 

 Z, lingual pouch ; e, stomach ; /*, liver ; i, intestine ; 

 r, rectum ; an, anus, ....... 



72. Digestive tube of Eolis papillosa. (After Alder and 

 Hancock.) a, lingual bulb ; 6, stomach ; c, anus ; d, c?, 

 hepatic caeca, . . . . . . . .93, 103 



Gizzard of Bulla lignaria. (After Woodward.) Face 

 and profile views, from a half-grown specimen ; the 

 anterior part is towards the base ; in the front view 

 the plates are in contact. The cardiac orifice is in 

 the centre, in front ; the pyloric orifice is upon the 

 posterior dorsal side, near the small transverse plate, 101 



73 



