PLATE XIV. 



1 . The hearts oi' the Calmai . 

 a. The hollow vein. 



bb. .. lateral hearts. 



cc. .. pulmonary arteries. 



2. The heart of the Aplysia. 

 a. The hollow vein. 



d. branchiae. 



3. Spirula fragilis with its shell 



4. Tapada putrts, with its shell. 



5. The under side of a Patella, the head bent towar 

 a. The foot. 



I dd. The place of the branchiae 



ee. .. pulmonary veins. 

 \ f. .. middle heart. 

 I gg. .. aorta. 



j e. The auricle and pulmonary vein. 

 \f. .. heart, 

 j g. .. arteries. 



i the loot. 



mouth, 

 tentacula. 

 anus and oi 

 neration. 



of 



ge- 



hh. 



The pericardium. 



trunk of the branchial vein, 

 circular part of the above 



vein, 

 branchiae, 

 branchial artery. 



6. A Patella of the species in which the branchiae are interrupted. 

 a. The mouth. j gg. The intestines. 



bb. .. tentacula. h. .. branchiaa. 



c. .. fleshy mass. ii. branchial veins. 



d. nervous collar. qq. .. oviduclus. 

 J~. ovarium. 



7. Helix brevipes, with Us shell. 



S. Hy alea aust/nlis, with its shell seen on the side of the projecting valve. 

 a. b. c. The projecting points of the flat or ventral valve. 

 d. The dorsal valve. 



ff. .. mantle coming out from the interstice between the valves, close 



to which are the branchiae. 

 /. m. .. fins. 

 «. .. mouth. 

 9. Parmacella Olivier/, Cuv. opened. 

 a. The mouth. 



bb. 



h 



Call 

 a. 

 b. 



d. 



great horns, 

 brain. 



salivary glands, 

 organs of generation, 

 hag for the colouring 



liquid, 

 stomach. 

 [Sepia Lu/igoJ. 

 The head, 

 eyes, 

 feet, 

 arms. 



The retracting muscles. 



kk. liver. 



/. .. lungs. 



m. ,. auricle. 



n. .. heart. 



o. .. intestine. 



z. mantle turned back. 



e. The fiuinel. 

 y. .. abdomen. 

 g. . . fins. 



Brain of the Polypus; 



a. The ring round tlu 



b. 



ceso- I dd. Tin 



lateral ganglions, 

 abdominal plexus 



optical ganglions. 

 ]|." Brain of the Aplysia. 



a. The ring round the oesophagus. . 



1. . . brain. 



e. .. abdominal ganglion. 



12. The animal and shell of the flelico-Limax elongala. 



13. Janthina penicephala, with its vesicular appendage (spuma cartda- 



gineaj attached to the posterior part of the foot. 



H. Aplysia. 



a. The head. - . 



b. .. inferior tentacula. 



c. .. superior 



d. .. eyes. 



e. .. mantle, 

 operculum of the branchiae. 



The female Sigarctus seen underneath : the head and foot a Utile bent, 



to shew the entrance of the branchial cavity. 

 a. The notch. | b. The anus. 



The male Sigarctus seen underneath. 



d. The anterior part of the fool cleft 

 transversely, 

 organs of generation; 



a. The notch. 

 bb. .. tentacula, 

 cc. .. foot. 



edges of the mantle. 



17. Cariiuzria Mediterranea. 



18. Phctophorus with its shell. 



19. The female Vivipara taken oat of its shell 



a. The foot partly folded in two. 



b. operculum attached to the posterior part. 



c. .. head with the tentacula and trunk. 



tl. .. little siphon prolonged under the right terilaculuni. 

 e. .. lateral membrane of the left side. 

 /. -. edge of the mantle. 



g- A small portion of the branchiae shewing itself from underneath. 

 h. The orifice of the womb and anus. 



20. Halyotis, drawn from the living animal, with all its ornaments. 



