KUNOL. SV. VET. AKADEMIENS HANDLINGAR. HAND 47. NIO I. 



23 



Igd- 



I in 



pr 



Fig. 7. 



Fig. G. Yiew of the posterior extremity of a female specimen of Priapulus caudatus Lam. from Spitz- 

 bergen: Treurenburg bay; the caudal appendage having been cut away. D, dorsal surface; V, ventral surface 

 with the space in want of warts; a, anal aperture; d, diaphragmatic muscular membrane separating the eavitj 

 of the truuk from tliat of the caudal appendage and provided with an opcning for the rectum; p, papillse; i. 

 rectum; w, girdle of warts; Ig, left genital pore; rg, right genital pore. 



Fig. 7. Yiew of the interiör of the posterior portion of the trunk of a female Priapulus caudatus Lam. 

 from Gullmar fjord, d, diaphragmatic muscular membrane with an opening for the rectum: lm, longitudinal 

 muscular bands of the body-wall; ra, mesenteric membrane of the genital glands; lgd, left genital duct; rgd, right 

 genital duct; pr, posterior retractive muscular bands; r, rectum; rp, respiratory lobes of the caudal appendage; 

 w, warts. 



Fig. 8. Yiew of the interiör of the posterior part of the trunk of a male Priapulus caudatus Lam. 

 from the Gullmar fjord; the left portion of the body-wall with the left genital gland having been cut away. d, 

 diaphragmatic muscular membrane, separating the two cavities and provided with an opening for the rectum; 

 m, mesentery of the right genital gland; pr, posterior retractive muscular bands; rm, rectal muscles; rgd, right 

 genital duct; r, rectum; rp, respiratory lobes of the caudal appendage; p, papillse; t, chitinoid cuticle; n. nerve- 

 cord; tm, transversal muscular layer; lm, Iongitudinal muscular bands; w. warts; rp, respiratory lobes. 



It is asserted that the anal aperture 

 has a dorsal position. In all the specimens 

 which I have examined, from the arctic 

 sea or from the coasts of Sweden, I can 

 state that it is ventral and lies slightly 

 laterally to either of the genital pores, 

 which are invariably situated posteriorly 

 on each side of the posterior prolonga- 

 tion of the nerve-cord (figs. 4, 5 an 6 

 in the text). More than 16 individuals 

 have been subjected to a careful inve- 

 stigation, 6 brought home from Treu- 

 renburg Bay, 2 from Icef jord (Spitzbergen) 

 and 8 from Gullmarn off the west coast 

 of Sweden. 



Fig. 8. 



pr" : ; 



