34 THÉEL, PRIAPULIDS AND SIFUNCULIDS OF THE SWED1SH ANTARCTIC EXPEDITION 1901 — 1903. 



Plate II. 



Figs. 13—19. Priapulus horridas n. 



(Coast of Uruguay: 33° f S.— 51° 10' W.) 



Fig. 13. Ventral view of the animal. 20 /i. 



» 14. Front view of the introvert. 20 /i. 

 V. ventral surface; D, dorsal surface. 



» 15. A tooth broken off, probably from the interiör of the oesophagus. 804 /i. 



» 16. Four other teeth which also have become broken off and which must have been situated 

 in front of the former. 204 /i- 



» 17. Animal opened along the dorsal surface to show the internal structure. 81 /i. 



ar, antcrior short retractors; lr, posterior long retractors; lmb, longitudinal muscular bands of the 

 skin of the introvert; n, nerve-cord; pr, posterior muscular bands of the body-wall; lgd, left genital 

 duet; rgd, right genital duct; r, rectum; rp, respiratory lobes of the caudal appendage; d, diaphrag- 

 niatic muscular membrane separating the cavity of the truuk from that of the caudal appendage, and 

 having an opening for the rectum. 



>> 18. The caudal appendage with respiratory lobes and hooks. 8 %- 



» 19. Hind view of the posterior extremity of the caudal appendage. 8 %. 



Fig. 20. Phascolosoma margaritaceimi (Särs). 

 (Falkland Islands: Port Louis.) 

 Fig. 20. The animal, natural size. 



Figs. 21—23. Phascolosoma ohlini n. 



(South Georgia: »Maj viken».) 



Fig. 21. The animal. s /i. 

 » 22. Part of the proboscis behind the tentacles. 12 %- 

 » 23. Side-view of the foremost part of the proboscis showing the sparse hooks. 



Plate III. 



Figs. 24—27. Phascolosoma ohlini n. 



Fig. 24. Sample of skin from about the middle of the body. 12 %- 



25. Posterior extremity of the body with its papillae. 12 %. 



26. Sample of skin from the posterior extremity of the body. 12 %. 



27. Section through the skin from the posterior extremity of the body. 12 "/i. 



Figs. 28—34. Phascolosoma anderssoni n. 



(Graliam Region.) 



Fig. 28. The animal, natural size. 



29. Posterior part of the body. -'/i. 



30. Sample of skin from about the middle of the body. 7s /i. 



31. Section of skin from about the middle of the body. 78 /i. 



32. Posterior extremity <>f the caudal portion with papillae. 78 /i. 



33. Side view of bladders from the girdle. 78 /i. 



34. Side view of papillae immediately behind the girdle. 78 /i. 



