i; i II in \. i. PO I'l. \ \ \ 

 tern >!' < >ctopiix vul-raris. Chiajc, 1. c 



>imi^ \elloxii \ rli.i . i\ i. r. Keiiitl 



Venous hearts h r. I \\.\ nch i;e. 



I. Ajterial system of Octopus vulgaria Chiaje, 1. o., t. 88 ....... 



II. Mil. c . . \mi< -les. ./ ... (iiciit aoil;i. /, r. l'.ianchi;e. 



Plate 12. 



i. Nervous system of Ommastrephes todarue Ventral face. Man 



k, \nii. Mar. X. Mist . 8 ser., x. t. I, ., is.v. .......... 



Visceral i;ani;lii>ii. ,> f< Optic nerve, gp. Pedal <;an 

 ijion. i/bx,!/bi. Superior and inferior bnccal ganglia. b. Arm 



nerves. // /. Visceral nrrvrs / x f. ( Jan^lion Mrllat inn. 



H ji i. l-'in IHTVCS. u n . (Esophageal nerves. //'''. splanchnic 



^aii^liin. '//' <';inulion on tlit- \ciia rava. // b r. l.i'anchial 

 Jion. /i r. liranchial IUTVCS. // y/. Ncrvc.s u|' tin- ink-ha^ 

 and ivctuin. 



rinu of the sumo, from the back. Hancock, 1. c ____ 32 



g c. Cerebral ganglion, op. optic nerves, g p. Pedal gan- 

 glion. b. Arm-ncrvcs. g b s. Superior buccal ganglion. 



;',. The same. l'n>m the side ...................................... :',? 



o e. (Juliet. t n. Siphon nerves. o t. Acoustic nerves. 

 g v. Visceral uani;lion. // p. Pedal ganglion, b. Arm nerves. 

 op. Ocular norve. g c. Cerebral ^an^lion. 



4. (Ksophaueal rin<; of Sepia ollicinalis, from the side. Garner, 



Trans. Linn Soc., xvii, t. 'JI. 



/// //. I>uccal mass, g b t, g b s. Inferior and superior buccal 

 ^anulia. //p. Pedal ganglion. 0r 9. xisoeral ganglion, oe. Gullet. 

 n i>. optic nerve. // c. Cerebral ganglion. 



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



Anim. Moll., t. 1, f., ti.u. 2 .................................. 32 



KetVreiices same as tiu'. 4. 



6. Auditory or^an of Sej>ia otficinalis. Owen, Trans. Xool. Soc. 



Lond., ii, t. -21, is-ii ........................................ :::. 



The cephalic cartilage, /.; withdrawn to show the otolithic 

 cavities. 



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



t. :,, f. 59, .......... ' .................................... 33 



I. Lens. /. Retina. N. Sclerotica. c i. Ciliary bodies. 

 t. Iris. ,r. ( )nter skin. 

 S. Chromatophore from the skin of Sejtia ofticinalis. Keferstein, 1. 



i. PJO, f. S .............................................. 6 



ntracted chromatuphore of the same. Keferstein, 1. c., f. '.'... < 



Plate 13. 



1. ( 'irci dating and respiratory organs of Nautilus Pompilius. ( )\\en, 



1. c.. t. 15 ................................................. :;.") 



1. The ^reat vein. P. The orifices by \\ hid) it comiimnic,: 

 with the abdominal cavity '2. The venous siiiu>. :',. Splanch- 

 nic veins from the liver, ovary, ui/./.ard, etc. I. Origins of the 

 branchial arteries. :>. Branchial arteries, fi. Tin- follicle^ ap- 

 j.endcd to the branchial arteries. 7. Oritices by which they 

 communicate \\ith tlie branchial arterie.x. .-\posed on the left 

 Mde (the paits bein^ M-CU from the dorsal Rgpeot). B. The 

 valve at the entry of the branchial artery into the ^ill. e\piM-l 

 in the ri^lit anterior ve>.el. .. Cavity of the >ame artery, 



