532 THE ANATOMY OF INVERTEBRATED ANIMALS. 



by Kowalewsky, 1 Todaro, Brooks, 2 and Salensky. 3 The ob- 

 servations of the last-named author relate chiefly to Salpa 





Fig. 152.— Salpa democratica-mucronata.—\. Salpa democratica. II. Salpa mucro- 

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

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

 with attached Salpa mucronata buds. 



The letters have the same signification throughout : a, oral ; b, atrial orifices : c, 

 endostyle ; d, ganglion ; e, liypopharyngeal band in a so-called" branchia ; " f, 

 languet; g, heart ; h, geuimiparous stolon ; i, visceral mass or nucleus ; k, mus- 

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

 ciliated sac ; ce, celeoblast ; a, ectoderm and test ; /3, endoderm. 



democratica-mucronata, and his account of the process ap- 

 pears to me to be the most satisfactory. 



» 



1 " Naelmchten der Koniglichen Gesellschaft zu Gottingen," 1868. 



2 " Bulletin of the Museum of Comparative Zoology," Ko. 14. 



3 Zeitschriftfiir wiss. Zoologie, 1876. 



