304 



EXPLANATION OF THE PLATES. 



94. Medial section of the buccal mass of Sepia officinalis. 



(Keferstein.). mbc, Buccal membi'ane ; mZ, lip; 

 m .JO s, upper jaw ; m x ^, under jaw ; x^ so-called organ 

 of taste ; o e, opening of alimentary canal ; r d, 

 radula ; 2, tongue sheath ; s', salivary gland ; g I, 

 superior buccal ganglion ; g b, lower buccal ganglion, 91 



95. Beaks of Sepia officinalis, surrounded by the lip, . 92 



96. Dolium galea, L. Kf, jaws; I, lip; 2:, tongue; cA, 



Chiagian organ ; ch', blind sack of the oesophagus ; 

 |ju, crop; s, salivary gland. (Keferstein', 93, 100, 101 



97. Buccinum undatum, L. Proboscis half protruded. 



(Cuvier.) a, Invagination of proboscis ; 6, pro- 

 boscis; c, mouth; cZ, contractile muscles ; e, muscular 

 ring, . 93 



98. Tongue of Argonauta Argo, enlarged. (Fer. and 



d'Orb.) 5, the tongue viewed dorsally ; a, the teeth, 



in 'seven rows ; b, the outer rows of plates, . . 92 



99. Pharyngeal bulb of Polycera ocellata. Alder and Han- 



cock, from the Bay of Kiel. (Me3^er and Mobius.) 

 a, buccal orifice ; 6, jaw ; c, lingual plate ; d, oesoph- 

 agus ; e, lingual muscle ; /, radular bundles, . 62 

 100. Buccal opening and lips of Hinnites pusio, Donovan. 



(After Fischer), 105 



Plate 10. 



Lingual Dentition. 



1. Octopus octopodia, Linn. Face view of tongue. (D'Orb. 



Moll. Yiv.), 263 



2. Loligo pallida, Verrill. (Am. Jour. Science), . . 263 



3. Nautilus pompilius, Linn. Keferstein, t, 115, f. 3, . 264 



4. ' " " Section of radula, . . 264 



5. Conus Hebrseus, Linn. Troschel, ii, t. 1, f. 8, . 143,264 



6. Marginella elegans, Gmelin. Troschel, ii, t. 5, f. 6, . 264 

 *1. Melo nautica. Lam. Troschel, ii, t. 5, f. 2 a, . . 264 



8. Fasciolaria tulipa, Linn. Troschel, ii, t. 5, f. 12, . 264 



9. Mitra adusta. Mart. Troschel, ii, t. 6, f. 7, . . . 264 



10. Imbricaria conica. Lam. Ti'oschel, ii, t. 8, f. 6, . . 264 



11. Buccinum undatum, lingual ribbon, a. anterior, p. pos- 



terior end, 93, 96, 264 



12. Buccinum undatum. r, rachidian, /, laterals. (^ Wood- 



ward), ' . . . . 96, 264 



13. Nassa obsoleta. Say. Troschel, ii. t. 8, f. 22, . , 264 



14. Turbinella cornigera. Lam. Troschel, ii, t. 8, f. 5, . 264 



15. Oliva reticularis. Lam. Troschel, ii, t. 10, f. 12, . . 264 



16. Harpa conoidalis. Lam. Troschel, ii, t. 10, f. 1, . . 264 



