34 



Ficr. 10. Interior of the right side of the stomach. The 

 stomach has been opened by a vertical section, 

 a little to the right (if tlie median line so that 

 the median ventral tooth has been removed. 

 The greater part of the cardiac region of the 

 stomach is surrounded by a layer of connective 

 tissue. (aJ.f.) ant(>ro-laieral tooth; (d.I.) dorsal 

 lamella; (hep.) hepatopancreatic tubule ; (l.cJ.) 

 lateral cardiac lamella; {J.c.i.) lateral cardiac 

 tooth: (m.ti.f.) median anterior tooth; (oes.) 

 oesophagus; (r.i.f.) ventro-lateral tooth; 

 {v-Lj).!.) ventro-lateral ])yloric. lamella ; (v.c.f.) 

 ventral cardiac tooth. 



Fig. 10. Transverse section through the abdominal 

 region. The abdominal appendage of the left 

 side is omitted, (nd. tiss.) adipose tissue cells; 

 (h.c.) bod}' cavity (haemocoel); {hr.iieph.) 

 branchial nephrocytes; (hr.p.c.) branchio- 

 pericardial canal; [d.l.m.) dorsal longitudinal 

 muscles; (epim.) epimeron ; (hi.) heart; (???/• 

 l/iin.) inferior lamella of gill; (lev. in) levator 

 muscle of appendage ; (m/d. f/.) nud-gxit \ (p.c.) 

 pericardium; (■•<('p.) septum forming floor of 

 pericardium; (.■<i(p. I(tiu.) superior lamella of 

 gill; (fi/.) typhlosole; (vl.Jiep.) ventro-lateral 

 hepatopancreatic tu1)ule; (r./iep.) ventral 

 hepatopancreatic tubule; (f.Lm.) ventral 

 longitudinal muscles. 



Fig. 17. Transverse section of two of tlie rosette-like 

 salivary glands. The left section shows the 

 common duct (r.d.) of the glandular cells, 

 formed by the uniting of the intracellular 

 ducts (/<;'. r/.); n.c.d. is tlie nucdeus of the cell 

 which probably forms the common duct. 



