RKFKRKNC'K To PLATKS. 299 



PIGORKS, I'AGK. 



3. Venous system of Octopus vulgaris. Chiaje, 1. c, t. 87 85 



s V. Sinus venosus. v c. Vena cava. /•. Henal or<;ans. 

 c «, Venous liearts b r. BranchiiB. 



4, Arterial system ol' Octopus vulgaris. Chiaje, 1. c, t. 88 35 



c. Heart, c'. Auricles, a o. Great aorta. I> r. Branchi*. 



Plate 12. 



1. Nervous system of Ommastre plies todarus. Ventral face. Han- 



cock, Ann. Mag. N. Hist , 2 ser., x. t. 1, 2, 1852 32 



g ■>). Visceral ganglion, op. Optic nerve, gp. Pedal gan- 

 glion, gbs, gbi. Superior and infei'ior buccal ganglia. 6. Arm 

 nerves. n v. Visceral nerves. g s t. Ganglion stellatum. 

 71 pi. Fin nerves, n oe. Oesophageal nerves, gve. Splanchnic 

 ganglion, g x. Ganglion on the vena cava, g b r. Branchial 

 ganglion, b r. Branchial nerves, n y. Nerves of the ink-bag 

 and rectum. 



2. GDsophageal' ring of the same, from the back. Hancock, 1. c 32 



g c. Cerebral ganglion, o p. Optic nerves, g p. Pedal gan- 

 glion, b. Arm-nerves, gbs. Superior buccal ganglion, 



3. The same, from the side 32 



e. Gullet. t n. Siplion nerves. o t. Acoustic nerves. 

 g V. Visceral ganglion, g p. Pedal ganglion, b. Arm nerves. 

 p. Ocular nerve, g c. Cerebral ganglion. 



4. Esophageal ring of Sepia officinalis, from the side. Garner, 



Trans. Liim "-oc , xvii, t. 27. 



m b. Buccal mass, g b i, g b s. Inferior and superior buccal 

 ganglia, g' p. Pedal ganglion. (/«. \ isceral ganglion, o e. Gullet. 

 op. Ojrtic nerve, g e. Cerebral ganglion. 



5. The same from the back. Milne-Edwards in Cuvier's Regn. 



Anim. Moll., t. 1, f. , fig. 2 32 



Ueferences same as fig. 4. 



6. Auditory organ of Sepia officinalis. Owen, Trans. Zool. Soc. 



Lond., ii, t. 21, 1841 35 



The cephalic cartilage, k, withdrawn to show the otolitliic 

 cavities. 



7. Section of eye of an embryo Loligo. Kolliker, Entwick. der Ceph., 



t. 5, f. 59 33 



I. Lens. /•. Retina, s. Sclerotica, c i. Ciliary bodies. 

 i. Iris. a. Outer skin. 



8. Chromatophore from the skin of Sepia officinalis. Keferstein, 1. 



c, t. 120, f . 8 6 



9. Contracted chromatophore of the same. Keferstein, 1. c, f. 9. . . (j 



Plate 13. 



1. Circulating and respiratory organs of Nautilus Pompilius. Owen, 



1. c, t. 6 35 



1. The great vein. 1'. The orifices by which it communicates 

 with the abdominal cavity. 2. The venous sinus. 3. Splanch- 

 nic veins from the liver, ovary, gizzard, etc. 4, Origins of the 

 branchial arteries. 5. Branchial arteries. 6. The follicles ap- • 

 pended to the branchial arteries. 7. Orifices by which they 

 commvinicate with the branchial arteries, exposed on the left 

 side (the parts being seen from the dorsal aspect). 8. The 

 valve at the entry of the branchial artery into the gill, exposed 

 in the right anterior vessel. 9. Cavity of the same artery, 



