xcviii NATURAL HISTORY. 



glands. These bodies have been described in Sepiola,* as the oviducts, but they are 

 equally distinct from the true efferent tube in that genus as in Rossia ; the true oviduct 

 being single in Sepiola, as in Sepia, and forming by its termination the crescentic glan- 

 dular organ, which lies between and behind the two large accessory glands above 

 mentioned ; of which the function is to secrete the adhesive substance which connects 

 the ova, after they have passed out of the oviduct, and before they are discharged 

 by the funnel. Filamentary processes of the secretion were hanging from the ducts 

 of the glands in the specimen here described. They are composed of numerous trans- 

 verse laminae, the secretion of which passes into a central longitudinal fissure, where it 

 is moulded into the filamentary form. In Nautilus these glands are united at the mesial 

 plane, and the corresponding organ is single in the pectinibranchiate mollusks. 



EXPLANATION OF THE FIGURES. 



Plate B. 

 Fig. 1. Rossia palpebrosa, from the dorsal aspect. 



Plate C. 



Fig. 1. Rossia palpebrosa, with the mantle and funnel laid open on the ventral 

 aspect, showing the infundibular valve, the ova in the oviduct, and other viscera 

 in situ. 



Fig. 2. The same laid open on the dorsal aspect, and the capsule of the liver 

 removed, showing the ovisacs, and the relative position of the viscera on this side of 

 the abdomen. 



Fig. 3. The digestive canal laid open. 



Fig. 4. The branchia, and organs of circulation. 



The same letters indicate the same parts in each figure : — a, the eight brachia ; 

 a, one of the brachial suckers magnified ; b, the two tentacula ; b', a tentacular 

 sucker magnified ; c, the fins ; d, the inside of the mantle ; e e, the processes which 

 enter ff, the cavities at the base of the funnel ; g, the infundibular valve ; h, the open- 

 ing of the eyelids; i, the oesophagus; k, the muscular stomach; /, the pancreas; 

 m, the intestine ; n, the anus ; o, lower salivary glands ; p p, liver ; p' p, hepatic ducts ; 

 q, hepatic follicles ; r, ink-bag ; s, vena cava ; s' s, its glandular auricular portions 

 going to t t, the branchial ventricles ; v v, their fleshy appendages ; w w, the branchiae; 



* See Grant on the Anatomy of Hepiola, in Zool. Trans. — vol. i., p. 84, pi. 1 1, fig. 10. 



