380 EDWARD S. MORSE ON 



Figs. 0, 7, aii(i 10. Appearance of peduncle after death and separation from body. 



Figs. 8 and 0. I'ortions of peduncle ; arrows indicate direction of circulation. 



Figs. 11 and 12. Transver.se .sections of peduncle. 



Fig. 13. Peduncle as it issues from body. 



Fig. 14. Peduncular end of Ijincinisca lamMusa from ventral surface, showing peduncular muscles. 



Fig. 15. End of peduncle of young of TerehriUuliiia .leptentriunatis. 



PLATE 44. 



Setae fif varioua forms. 



Figs. 1 and 2. Setae of Glottidia pyramidata. 



Fig. 1. Setae projecting from side of pallium, wilb color indicated by shading. 

 Fig. 2. Proximal portion of .seta. 

 Fig. 2(1. Termination of seta. 



Fig. 3 to r>. Setae of DhclniKru slclla. 

 Fig. 3. Various forms of .setae. 

 Figs. 4 and •'J. Appearance of setae .springing from iiiiUium. 



Fig. 6 to 10. Setae of Disrinitica liiineUosa. 

 Fig. 6. Setae of extreme young. 

 Fig. 7. Setae of adult. 



Fig. 8. Portion of iialliuni showing setae springing from setigeroiis follicles with setellae turned back. 

 Figs. 9 and 10. Setae of yotuig. 



Fig. 11. Seta from extreme young of T. septentrlonalis, with setigerous follicle. 

 Fig. 12. Border of pallium of Terebratalia coreanica showing setae. 

 Fig. 13. Border of pallium of Terebratalia minor showing setae. 

 Fig. 14. Seta of Lai/ueus ruhiilus. 

 Fig. 15. Border of pallium of Heiailliyri^ psittarca showing setae. 



PLATE 45. 



Various life attitudes of the brachia of Ohittidia pyramidata and Liu(iiila lepidida. 

 Fig. 1 to 12. Olottidia pyraiiiidata. 

 Fig. 1. Dorsal view. 

 Fig. 2. Ventral view. 

 Fig. 3. Dorsal view. 

 Figs. 4, 5, 6, and 10. Anterior views. 

 Fig. 7. Oblique anterior view with shells slightly parted. 

 Fig. 8. View of brachia from ventral side. 

 Fig. 9. Left brachium, ventral surface uppermost. 

 Figs. 11 and 12. Lateral view. 



Fig. 13 to 15. Linf/ula lepidula. 

 Fig. 13. Dorsal view. 

 F'ig. 14. Anterior view. 

 Fig. 15. Ventral view. 



PLATE 4fi. 



Br.achia and cirri of various forms. 



Figs. 1 and 2. End of cirrus of G. pyramidata. 



Fig. 3. Portion of brachia with collar and one cirrus of L. lepidula. 



