98 



orb. V. = \'t'i]i to orbital sinus. 



p. c. = Polygonal cell. 



pad. = Muscular stomach pad. 



pch. = Pouch-like dilatation. 



pen. = Penis. 



ps. ext. = Ext. pseudocorneal niemb. 



ps. int. = Int. pseudocorneal menib. 



ps. mem. = Pseudocorneal membrane. 



P. = Pancreas. 



Pj = Terminal suckers of male. 



P. C. — Post, communication between 



mantle cavities. 

 P. A. = Pancreatic artery. 

 Pp. = Pupil of eye. 

 P. M. = Post, membranous wall of 



brain capsule. 

 Pall. N. = Pallial nerve. 

 Pall. V. = Pallial vein. 

 Ped. G. = Pedal ganglion. 

 Ph. A . = Pharyngeal artery. 

 Pig. = Retinal pigment. 

 Post. Fun. N. = Post. Infundib. nerve. 

 Post. Sup. oph. = Post. Sup. Ophthal- 

 mic nerve. 

 pr. = Prostate. 

 r. = Ridge for jaw muscles. 

 r. b. = Base of radular sac. 

 r. m. gr. — Right mantle groove. 

 rad. = Radula. 



R. = Rectum. 



R. K. = Right Kidney. 



R. N. = Retinal nerves. 



R. Pall. A. = Right Pallial artery. 



R. Pc. ap. — R. reno -pericardial aper- 

 ture. 



R. S. = Radula sac. 



R. wall. = Inner wall of oesophagus. 



Rec. = Recurrent artery. 



Res. = Reservoir. 



Ret. = Retina. 



Ret. C. = Retinal cell. 



Ret. N. — Nucleus of ditto. 



S. A. = Salivary artery. 



s. d. = Sensory pad. 



*. g.. .Sj g x = Salivary glands. 



s. g. d. = Salivary ducts. 



sh. = Shell. 



8. 1, g. = Sub-lingual salivary gland. 



fik. = Edge of integument. 



•v. r. = Sensorv ridge. 



s. r. o. = Sub-radular organ. 



S. = Sucker. 



S. a. = Sucker artery. 



8. G. = Ganglion supplying suckers. 



S. N. = Nerves to sucker. 



S. V. = Venous Sinus. 



S 1 F 1 , jSjFj, *S r 3 1 * 3 . = 1 divisions of ditto. 



S. Vess. = Vein running between 



successive suckers. 

 Sept. A. = Septal artery. 

 Sept. V. = Septal vein. 

 Sph. = Sphincter of sucker. 

 St. G. = Stellate ganglion. 

 scl. = Sclerotic. 

 Sp. Coe. = Spiral caecum. 

 St. = Stomach. 

 Stat. = Statolith. 

 Str. = Oonn. tiss. Stroma. 

 Sup. V. = Superficial veins of head. 

 t. = Tongue. 



tr. = Secretory trabecular of Ink gland. 

 tr. s. = Triangular septum in heart. 



T. = Testes. 



Tu, — Secretory tubule. 



Ur. = Ureter. 



Ur. p. = Urinary papilla. 



T". = Ventricle. 



v. = Trans, valves in spiral caecum. 



V. U. = Vas deferens. 



V v V n . — Secondary Branchial veins. 



V v — Semilunar valves. 



V. app. = Venous appendages. 



Vise. A. = Visceral artery. 



vise. d. = Visceral dome. 



Vise. G. = Visceral ganglia. 



Vitr. — Vitreous body. 



V . E. — Visceral envelope. 



V. Eff. = Vas efferens. 



Vase. N. = Vascular network. 



Vise. N. = Visceral nerve. 



V. E. A.= Artery to visceral envelope. 



V. E. V. = Vein from visceral envelope. 



V. S. = Vesicula seminalis. 



F t S t = Sac of vitreous fluid. 



W. = Web. 



W. B. = White body. 



W. V. C. = Water vascular canal. 



W. V. 0. ap. = Opening of water canal 

 into pericardium. 



