78 



Fig. 40. On of the tentacles strongly magnified. 



41. A piece of the same, shewing the elongated conical sicle-papillse. 



42. The animal seen from the right side, the mantle being partly removed to shew the 

 underlying parts, d, the foot; t.t, the tentacles; x. x, the conical papillae ; e, the gill. 



43. The exterior part of the gill strongly magnified. 



PI. IV. 

 Fig. lll. Oonieolis typica. 



Fig. 1. A specimen seen from above, about 4 times magnified, a. a, the dorsal tentacles; 

 b, the velum; c. c, the labial tentacles; d, the proboscis; e, the penis. 



2. The same specimen seen from the right side. /", the anus; the other letters as 



in fig. 1. 

 3. Some of the dorsal papillae (the gills) strongly magnified. 



3. The jaw and soft parts adjacent seen from the left side, a, the tongue; &, the sub- 



sidiary bucal cavity. 



5. The left jaw seen from the outer side. 



6. The right jaw seen from the inner side. 



7. The tongue with the rasp-plate, seen from the side (reversed position). 



8. The tongue seen from the upper edge. 



9. A piece of the rasp-plate with the 3 rows of teeth. 



10. A piece of the middle row of teeth; side view. 



11. Some of the middle teeth isolated and in different positions. 



Fig. 1218. Uinbellisyllis fasciata. 



Fig. 12. A specimen seen from above, about 3 times magnified. 



13. The head and the anterior part of the body seen from above, more strongly mag- 



nified, a, the semi-lunar membrane. 



14. The same; front view, a, as in the preceding figure. 



15. A piece of the body in the middle, shewing the peculiar dark transverse bands 



interrupted in the medial line. 



16. Section of one of the middle segments. 



17. The posterior end of the body, seen from above. 



18. One of the pedal bristles, strongly magnified. 



Fig. 19 35. Paramphinome pulchella. 



Fig. 19. A spirit specimen viewed from the right side, magnified about 10 times. 



20. The anterior part of the body of the same specimen seen from above, more strongly 

 magnified, a, the evaginated gullet or proboscis; b. b, the two strong chitine hooks 

 attached to the first segment; e. e, the anterior gills. 



