532 THE ANATOMY OF INVERTEBRATED ANIMALS. 



by Kowalewsky/ Todaro, Brooks,' and Salensky.' The ob- 

 servations of the last-named author relate chietly to Sal2^a 



Fig. 152. — Salpa democraticamucronata. — T. Sdlpa democrafica. U. Salpa mvcro- 

 nata. III. A fcetal Salpa democratica attached by its placenta to the wall of the 

 atrial cavity of a Salpa mucronata. IV. Part of the stolou of Salpa democratica 

 with attached Salpa mucronata buds. 



The letters have the same signification throujjhout : a, oral ; 6, atrial orifices ; c, 

 endosiyle; (Z, ganglion ; e, hypopharyngeal band in a eo-cailecl " brancliia;"j^ 

 lan^uet; g, heart ; A, gemmiparoiis stolon ; t, visceral mass or nnclens ; k, mus- 

 cniar bands ; m, placenta ; n, blood-sinus ; q, ovisac and ovum ; t, stomach; w, 

 ciliated sac ; ce, celeoblast ; a, ectoderm and test ; j3, endoderm. 



democratlca-imicronata, and his account of the process ap- 

 pears to me to be the most satisfactory. 



* " Nachrichten der Koni<^lichen Gesellschaft zu Gottin^en," 1868. 



2 " Bulletin of the Museum of Comparative Zoology," r^o. 14. 



3 Zdtschrij'tfur whs. Zoologie^ 1876. 



