PLATE XII. 



Figs. 1-7. Guleolus recumbens, Herdman. 

 Figs. 8-12. Ctileolus perlucidus, Herdman. 



Fig. 1. A section through the test of Guleolus recumbens, showing foreign particles 



imbedded in the outer part (left side of figure) ; magnified (Hartn., obj. 4). 

 Fig. 2. A transverse section through the peduncle of the same species, showing the 



cavities (ped.c), and the imbedded foreign particles ; magnified (Hartn., 



obj. 4). 

 Fig. 3. Part of the branchial sac, from the inside, showing a fold (br. f.) ; magnified 



(Hartn., obj. 4). 

 Fig. 4. Part of the endostyle, showing the clear edges, with spicules, and the central 



opaque area ; magnified (Hartn., obj. 4). 

 Fig. 5. Columnar cells from the brown band of the endostyle ; much magnified (Hartn., 



obj. 7). 

 Fig. 6. The terminations of the genital ducts; magnified (Hartn., obj. 4). 

 Fig. 7. One of the genital glands, enlarged, showing the ducts. 

 Fig. 8. A section through the test of Culeolus perlucidus, showing the papillae on the 



outer surface ; magnified (Hartn., obj. 4). 

 Fig. 9. Part of the endostyle, showing the clear edge (w.e.), and the central more 



opaque area (e.b.a.) ; magnified (Hartn., obj. 4). 

 Fig. 10. Part of the circlet of tentacles, showing three orders (tn., tn'. and tn.") ; magnified 



(Hartn., obj. 4). 

 Fig. 11. Part of a section through one of the genital glands, showing the spermatic 



vesicles externally, and the ova internally ; magnified (Hartn., obj. 4). 

 Fig. 12. Part of the wall of the stomach, with the lining epithelium scraped off, showing 



the branched hepatic (?) tubules, with enlarged ends ; much magnified 



(Hartn., obj. 7). 



