REFERENCE TO PLATES. 



Plate 4. 



1. Digestive system of Octopus octopodia. Keferstein, t. 116, f. 2.. 29 



in It. Huccal mass. // /;. Lower buccal ganglion, s'. Pos- 

 terior salivary glands, h. Liver. o e. Alimentary canal. 

 d h. Biliary duct. . Intestine. a. Anus. b i. Ink-bag. 

 (/ a p. Splanchnic ganglion, v. Stomach. '. Blindsack. 



2. Medial section of the buccal mass of Sepia officinalis. Kef'er- 



stein, Klassen und Ordnuugen, t. 116, f. 4 .................... 29 



m b c. Buccal membrane. m I. Lip. m x B. Upper jaw. 

 in x i. Under jaw. x. So-called organ of taste, o e. Opening 

 of alimentary canal, rd. lladula. .:. Tongue sheath, s'. Sali- 

 vary gland. g L Superior buccal ganglion, gb. Lower buccal 

 ganglion. 



3. Tongue of Argonauta Argo, enlarged. Fer. and Orb., Ceph. 



Arg., t. 1, 4 ter., f . 8 ........................................ 29 



B. The tongue, viewed dorsally. a. The teeth in seven 

 rows. b. The outer rows of plates. 



4. Beaks of Sepia officinalis surrounded by the lip ................. 2t) 



5. 6. Octopus octopodia. Tongue, profile (5) and face (6) view. 



d'Orbigny, Moll. Viv., t. 1. f. 8, 9 .......................... 29 



7. Section through the radula of Nautilus Pompilius ............... 29 



8, 9. Tongue and dentition of Argonauta Argo, dorsal and profile 



views. Fer. and Orb., Ci'ph. Arg., t. 1, f. 3, a, b .......... 29 



Plate 5. 

 Lingual Dentition ...................... 29 



1. Octopus punctatus, Gabb. Dall. Proc. Calif. Acad., iii, 243, f. 27. 



2. Octopus macropns. Targioni. Bull. Mai. Ital., ii, t. vi, t'. 5. 



3. Parasira catenulata, Targioni. 1. c., t. 6, f. 4. 



4. Octopus vulgaris, Trosckel. Archiv fiir Naturg., t. 1, t'. 2, ls.~i:;. 

 ."i. Loligo Mediterranea, Targioni. 1. c., t. 7, f. 3. 



6. Argonauta Argo, Troschel. Ibid., f. 4. 



T. ( tnychoteuthis Bergii, Troschel. Ibid., f. 6. 



8. Tremoctopus Carense, Troschel. Ibid., fig. 3. 



9. Onychoteuthis Owenii, Targioni. 1. c., t. 7, f. 4. 



10. Eledone cirrosa. Ivongl. Vetensk. Foreh., t. 3, 1847. 



11. Loligo mannone, Targioni. 1. c., t. 7, t'. ('. 



12. Eledone nioschata, Troschel. Ibid., tig. 1. 



18. l.olig.. llartingii, Vcrrill. Am. Jouri Sci. N. S., ix, t. 4, f. S, 



Plate 6. 

 Lingual Dentition ...................... 29 



1. Loligo vulgaris, Kongl. Vetensk. Foreh., t. 3, 1847. 



2. Onminst replies sagittatus, Trosclu'l. Ibid., t. 1, I'. ">. 

 ::. Scpiola Rondeletti, Targioni. 1. c., t. 7, f. 8. 



I. Loligo pallida, Verrill. Am. Jour. Sci. N. S., ix, t. 4, f. 7, 1 



5. Nautibi^ iionijiiliux. Kct'ci-stein. T. 115, f. 3. 



(i. Archilcntliis monaclms, Verrill. Am. Jour Sci. N. S.. ix, t. 4, f. 

 r ', W 



In A. J. Sc., xii, Wt, Mr. Verrill says that this is not an 

 odOHtophore, but a sjiccialixod chit i noi is lining of the mouth or 

 pharynx, covered with sharp teeth and grannies. The tine 

 odontophore is about 70 mill, long and 12 mill, wide, has s-\en 



