532 THE ANATOMY OF INVERTEBRATED ANIMALS. 



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

 servations of the last-named author relate chiefly to Salpa 



Fig. '\^1.—Salfpa democratica-mucronata. — I. Salpa democratica. II. Salpa mvcro- 

 nafa. III. A foetal Srdpa democratica attached by its placenta to the wall of the 

 atrfal cavity of a Saf2}a mucronata. IV. Part of the stolon of Salpa democratica 

 with attached Salpa mucronata bude. 



The letters have the same signification throuG:hont : a, oral ; ft, atrial orifices : c, 

 endostyle; rf, eanglion ; e, liypopharyngeal band in a so-called " branchia ; " yi 

 lan^iiet; g, heart ; A, gemmiparone stolon ; i, visceral mass or nucleus ; k, mus- 

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

 ciliated sac ; a, oeleoblast ; a, ectoderm and lest ; /3, endoderm. 



democratica-')niicronata, and his account of the process ap- 

 pears to me to be the most satisfactory. 



» " Nachrichten der Koniglichen Gesellschaft zu Gottingen," 1868. 



2 "Bulletin of the Museum of Comparative Zoology," "No. 14. 



3 Zeitschrift/dr wiss. Zoologie^ 1876. 



