MORPHOLOGY OF MELIBE 589 



Fig. 32. — From a whole mount of muscle-cells taken from the body-wall. 

 The fine granular appearance along the periphery of the cells is represented 

 in the next figure by ' Sar " ; Nu, nucleus. 



Fig. 33. — Cross-section of muscle-bundle showing section of a few fibres 

 only. Ca, axial sarcoplasm ; Intc, inter-fibre connective-tissue cell ; 

 K, chromatin granules ; Lin, linin ; il/c, muscle-cell cut through the centre ; 

 3Icp, peripheral micromeric region of cell ; Mfe, muscle-cell cut near its 

 tapering end ; Ms, perimysium ; Mt, endomysium ; My, myofibrillae ; 

 Nuco, nucleolus ; Nu, nucleus ; iVws, nuclear sap ; Sar, sarcolemma. 



Fig. 34. — A few connective-tissue cells and muscle-fibres from the body- 

 wall. Mf, muscle-fibres ; Pric, granular connective-tissue cells. 



Fig. 3.5. — Photograph of a cross-section of the pharynx near the mouth 

 to show the corrugations (Cor) of the lining. 



Fig. 36. — Microphotograph of a median sagittal section of the oeso- 

 phagus. Oe, oesophagus ; G, proventriculus ; S, gizzard ; Br, brain. X 8. 



Fig. 37. — Microphotograph of a cross-section through the gizzard. 

 Hep, hepatic canals into the gizzard ; V, ventral side, x 14. 



Fig. 38. — Microphotograph of a cross-section of the posterior part of the 

 proventriculus showing the end of the glandular lining. F, remnants of 

 food ; Cm, circular muscle-layer ; Gl, glandular mucous lining ; J/, 

 stomach-contents (mucus ?). x22. 



Fig. 39. Microphotograph of a cross-section through the anterior part 

 of the pyloric diverticulum. Mu, mucous coat ; Mus, muscle-layer ; 

 Ti/, typhlosole. x 18. 



Fig. 40. Microphotograph of a cross-section of the larger portion of the 

 intestine. Ex, mucosa ; Ti/, typhlosole ; Veb, ventral blood-vessel. 

 x37. 



Fig. 41. Drawing of a longitudinal section of the oesophagus. Be, con- 

 nective-tissue cells ; Ept, epithelial lining ; Mst, muscle-fibres ; Nv, 

 nucleus ; Sg, salivary glands ; V, crypts of salivary glands. 



Fig. 42. — ^Drawing of a cross-section of the gizzard. Bm, basement 

 membrane of the endoderm lining of the gizzard ; Cc, external cover ; 

 Ept, epithelium of the gizzard ; Mus, circular muscle-layer ; Stpl, stomach- 

 plates ; Trs, transitional parts of the stomach-plates, a product of the 

 epithelial lining. 



Fig. 43. — Longitudinal section of the gizzard. Cf, connective tissue, 

 and a few muscle-fibres ; Cs, circular muscle-layer cut transversely ; 

 Ej)f, epithelial lining showing several secretion vacuoles in the cytoplasm 

 and nuclei in various conditions of the so-called resting stage ; Kar, 

 chromatin granules ; Lin, linin ; Nuco, nucleolus ; Nu, nucleus ; 01, 

 external cover ; St.pl, stomach-plates ; Sv, secretion vacuoles ; Trp.pl. 

 transitional part of stomach-plates. 



Fig. 44. — Drawina; of one of the corrugations from the pyloric diverti- 

 culum (vide fig. 39). Bg, basal granules (terminal bars) : Bm, basal 



