378 



EDWAliD S. MORSE ON 



s. t. — seta! tubes. 



sto. — stomach. 



su. — supernumerary muscle. 



t. — testes. 



V. — ventral shell. 



V. m. — ventral mesentery. 



V. l: — ciliary ridge of visceral sinus. 



V. t. — vascular twig. 



PLATE 3f). 

 Reproductions of original drawings to illustrate color in living Brachiopoda. ' 



Fig. 1. Lingula lepidula from ventral side. 



Fig. 2. Brachia of L. lepidula showing color of border and cirri. 



Fig. 3. Anterior portion of pallium of L. lepidula. 



Fig. 4. Portion of pallium of Glottldia pyramidata showing three rows of gill ampullae and pigmentation between. 



Fig. 5. View of pallium showing anterior pallial folds. 



Fig. 6. Enlarged view showing pigmentation of pallial fold. 



Fig. 7. Cirrus of G. pyramidata showing pigmentation. 



Fig. 8. Nephridia of Dallina grayii. 



Fig. 9. Nephridia of Terehratulina septentrionalis. 



Fig. 10. Spermary thread of T. septentrionalis. 



Fig. 11. Border of pallium of Terebratalia coreaiiica. 



Fig. 12. Stomach and immediate parts of T. coreanica. 



Fig. 13. Ovarian leaflets of T. coreanica. 



Fig. 14. Pallium and pallial sinuses of T. coreanica filled with eggs. 



1>LATE 10. 



Appearance in life of various forms. 



Fig. 1 to 5. Glottidia pyramidata. 



Fig. 1. Dorsal view, at rest. 



Fig. 2. Dorsal shell, oscillating. 



Fig. 3. Side view, dorsal shell elevated. 



Fig. 4. Side view, dorsal shell depressed. 



Fig. 5. Peduncle showing vermiform convolutions with posterior end inclosed in sand tube. 



Fig. to 15. Lingula lepidula. 



Figs. 6, 7, 8, and 9. Various attitudes. 



Fig. 10. Burrow in sand. 



Fig. 11. lOleveu individuals attached to bottom of bowl by sand accretions ; 



Figs. 12 and 13. Showing attitude in sand, with setal tubes formed. 



Fig. 14. Front view showing anterior pallial folds and setal tube openings. 



Fig. 15. Side view with lateral setae vertical and meeting. 



Fig. 10 to 18. Lingula anatimi. 

 Yv^. 16. Showing end of peduncle encased in mud tube. 

 Fig. 17. Young specimen with brachia extended laterally. 

 Fig. 18. Dor.-ial view of partially grown individual. 

 Fig. 19. Side view of Discinisca lamcUosa from alcoholic specimen. 



compare with Glottidia (41 : 13). 



'For explanation of details of these figures see succeeding plates. 



