OCR Text |
Show 1895.] TEETH OP CERTAIN POISONOUS SNAKES. 825 Fig. 13. Dryophis mycterizans: left maxilla from below. 14. „ „ : eye with Harderian gland. 15. Dryophis prasinus: portion of transverse section of head through the base of the grooved tooth, showing the communication between it and the duct of the poison-glaud. 16. Dryophis prasinus: transverse section of grooved tooth. 17. ,, ,, : section of poison-gland showing three of the alveoli consisting of more or less columnar cells with large granular nuclei at their bases. 18. Dryophis prasinus: portion of the epithelium of the poison-duct while it is inside the gland. (The duct is more or less convoluted and the convex side of the drawing is towards the interior of the duct.) 19. Dryophis mycterizans: portion of the wall of the poison-duct at a point where it leaves the gland. 20. Oxybelis fulgida: eye with Harderian gland. 21. „ „ : left maxilla from below. 22. „ „ : transverse section through the region of the base of the first grooved tooth. 23. Eteirodipsas colubriens: head from the right side. 24. ,, ,, : right maxilla from below. 25. Psammodynastes pulverulentus: posterior portion of the right inaxilla from below. PLATE XLV. Fig. 1. Ccelopeltis lacertina: head from the left side. 2. „ „ : left maxilla from below. 3. ,, „ : transverse section of grooved tooth. 4. „ ,, : eye removed, to show the Harderian gland. 5. ,, ,, : transverse section through the region of the grooved tooth, showing its communication with the duct of the poison-gland. 6. Philodryas olfersii: head from the left side. 7. „ „ : left maxilla from below. 8. Philodryas schottii: head from the left side. 9. „ ,, : left maxilla from below. 10. Leptodira rufescens: bead from the left side (mandible removed) 11. „ „ : left maxilla from below. The positions of the reserve grooved teeth are indicated by dotted lines. 12. Leptodira rufescens: transverse section of grooved tooth. 13. Leptodira annulata: head from left side. 14. ,, ., : left maxilla from below. 15. Thamnodynastes nattered: left maxilla from below. 16. „ „ : transverse section of grooved tooth. 17. Trimerorhinus rhombeatus: head from the left side. 18. „ „ : left maxilla seen rather obliquely from below. 19. Psammophis sebelans: right maxilla from below. 20. Homalopsis buccata: head from right side. 21. „ ,, : right maxilla from below. 22. „ „ ' transverse section of one of the anterior maxillary teeth. 23. ,, „ : transverse section of grooved tooth. 24. ,. „ : Harderian gland (eye removed). 25. Cerberus rhynchops: right maxilla from below. PLATE XLVI. Fig. 1. Distira cyanocincta: head from the right side. 2. Enhydris hardwickii: „ „ „ 3. Hydrus platurus: „ „ „ Inferior labial gland removed. |