70 



I)it. = Intestine (the coils arc 



numbered in Figs. 10a Mid 



b). 

 I.L. = Inner lip (only a line is 



shewn as neither lip comes 



in mediorn section). 

 K.C. = Kidney cavity. 

 Lab. = Labial commissure. 

 Lat.St. = Lateral ('-epipodial") 



streak. 

 L. An. = (Morphologically left) 



auricle. 

 L.K. = Left kidney. 

 L.K.Ap. = External aperture of 



left kidney. 

 L.M.T. = Lesser mantle ten- 

 tacle. 

 L.Osph.G. = Left osphradial 



ganglion, 

 ill. = IMantle or pallium. 

 Mcp. = Micropyle. 

 Mescii = IMcsentcron (endodcr- 



mic) . 

 J/c'SO. = Foot rudiments (meso- 



dermic). 

 M.Gang.C. = ^Multipolar ganglion 



cell. 

 M.T. = Pallial tentacle. 

 Mth. = ]\Iouth. 



M.T.N. = Nerve of pallial ten- 

 tacle. 

 N.C. = Nuchal cavity. 

 N.R. = Nuchal roof. 

 N.E.V. = Veinlets from nuchal 



roof. 

 Odont.C. = Odontophoro cushion. 

 Ocs.F. = Oesophageal pouch. 

 O.L. = Outer lip. 

 Op.N. = Optic nerve. 

 Os. — Osphradium. 

 Os.E. = Osphradial epithelium. 



OsjiJi. G. = Osphradial ganglion. 



at. = Otocyst. 



Ot.\'. = Nerve of otocyst. 



I'. = Pericardium. 



ral.Gl. = Pallial gland-tissue. 



Pal.M. = Pallial muscle. 



Pal.N. = Nerve in mantle tissue. 



Pap. = Ridged jiapella or 



"licker."' 

 I'ap.Cr.F. =- T^ipilUe of internal 



edge of transverse crop 



folds. 

 P.G. = Posterior cartilage of 



odontophore. 

 P. Cell. = Pigment cell of eye. 

 I'cd. = Pedal nerve cord. 

 Pc'd.Anas. = Pedal anastomosis. 

 PcJ.S. = Pedal sinus. 

 Pig.Bd. = Pigment band. 

 PI. = Pleural ganglion. 

 Pl.Ped. = Pleui'o-pedal connective. 

 Post. A. = Posterior artery. 

 P. Pal.N. = Posterior pallial nerve. 

 P.p.b.c. = Post palatal buccal 



cavity. 

 Pr.Tr. = Prototroch. 

 P. 'V. Lobe. = Perivisceral lobe of 



right kidney. 

 I'.Z. = Pigment zone of pigment 



cell of eye. 

 P. = Picctum. 

 Pad. --= Radula. 

 Beet. = Rectal e vagina tion of 



mid -gut. 

 R.G. =;- Rudimentary gill (ctcn- 



idium). 

 U.K. = Right kidney. 

 P.R.Ap. — External aperture-of 



right kidney. 

 R.OapJi.G. = Right osphradial 

 ganglion. 



