TEE LIFB-HISTORY OF NUCTJI-A DELPHINODONTA. 387 



7. Kellogg. — "A Contribution to our Knowledge of the Morpliology of 



Lamellibranchiate Mollusks," ' Bull. U. S. Fish. Com.,' vol. x, 1890. 



8. KowALEVSKY. — " Etudc &ur i'embryogene du Deutale," 'Ann. Musee 



d'Hist. nat. de Marseille, Zool.,' tome i, 1883. 



9. Lacaze-Duthiers. — " Histoire de I'organisatiou et du developpement 



du Dentale," ' Ann. des Sci. Nat.,' series 4, tome vii, 1857. 



10. Milne-Edwaeds. — ' Lepons sur la pliysiolou'ie et I'anatomie conipHree.' 



11. MiTSUKUiu. — "On the Structure and Significauce of some Aberrant 



Forms of Lamellibranchiate Gilb," ' Quart. Journ. Micr. Sci.,' vol. 

 xxi, 1881. 



12. Fatten. — " The Embryology of Patella," ' Ai b. Zool. lust. Univ. Wien,* 



Bd. vi, 1886. 



13. Pelseneer. " Contribution a I'etude des Lamellibranchs," * Arch, de 



Biol.,' tome xi, 1891. 



14. Pelseneer. ' Recherches morphologiques et phylogeuetiques sur les 



Mollusques archaiques,' 1899. 



15. Pruvot. — "Sur le dcveloppemeut d'uu Solenogastre," ' Conipt. rend. 



Acad. Sci.,' Paris, tome cxi, 1890. 



16. ItiCE. — "Die systematische Verwertbarkeit dcr Kiemen bei den 



Lamellibrauchiaten," 'Jen. Zeit. t'lir Naturwiss.,' Bd. xxxi, 1897. 



17. Stempell. — " Beitriige zur Kenntniss der Nuculiden," ' Zooi. Jahib.,' 



Suppl. 4, Fauna Ciiilensis, Belt 2, 1898. 



18. Stempell. — " Zur Anatomic von Solemya togala," ' Zool. Jahrb.,' 



Bd. xiii, 1899. 



19. Thiele. — "Die Stammesverwandtschaft der Mollusken," 'Jen. Zeit. 



I'iir Naturwiss.,' Bd. xxv, 1891. 



20. ZiEGLER. — "Die Enlwickclung von Cyclas cornea," 'Zeit. fiir wiss. 



Zool.,' Bd. xli, 1885. 



EXPLANATION OF PLATES 20—25, 



Illustrating Mr. (xilniau A, Drew's paper ou " The Life- 

 History of Nucula delphiuodonta (Mighels)." 



Reference Lelters. 



aa. Anterior adductor muscle, aas. Anterior adductor muscle-scar. ap. 

 Apical plate. Lg. Byssal gland, hs. Blood-si)ace. ca. Cartilage, eg. 



