380 EDWARD S. MORSE ON 



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



Figs. 8 and 9. Portions of peduncle ; arrows indicate direction of circulation. 



Figs. 11 and 12. Transverse sections of peduncle. 



Fig. 13. Peduncle as it issues from body. 



Fig. 14. Peduncular end of Discinisca lamellosa from ventral surface, showing peduncular muscles. 



Fig. 15. End of peduncle of young of Tereljratiilinn septentrionalia. 



PLATE 44. 



Setae of various forms. 



Figs. 1 and 2. Setae of Gluttidia pyramidata. 



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

 Fig. 2. Proximal portion of seta. 

 Fig. 2d. Termination of seta. 



Fig. 3 to 5. Setae of Discinisca Stella. 

 Fig. 3. Various forms of setae. 

 Figs. 4 and 5. Appearance of setae springing from pallium. 



Fig. C U> 10. Setae of Dincininco Itunrllosa. 

 Fig. 0. Setae of extreme young. 

 Fig. 7. Setae of adult. 



Fig. 8. Portion of pallium showing setae springing from setigerous follicles with setellae turned back. 

 Figs. II and 10. Setae of young. 



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

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

 Fig. 13. Border of pallium of Tvrvbratalia minor showing setae.- 

 Fig. 14. Seta of Laqiteus rubellus. 

 Fig. 15. Border of pallium of Hemithyrls pxiftafea showing setae. 



PLATE 45. 

 Various life attitudes of the brachia of Gluttidia pyramidata and Lint/ula lepiditlii. 



Fig. 1 to 12. Gluttidia pyramidata. 

 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. Liiiyula Irpidula. 

 Fig. 13. Dorsal view. 

 Fig. 14. Anterior view. 

 Fig. 15. Ventral view. 



PLATE 46. 

 Brachia and cirri of various forms. 



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



Fig. '.'. Portion of bracbia with collar and one cirrus of L. lepidulu. 



