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.l. 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 ; ft, atrial orifices : c, 

 endostyle; d, ganglion ; e, hypopharyngeal band in a so-cailed " branchia ; "/> 

 lansjuet ; </, heart ; h, gemmiparous stolon ; t, visceral mass or nucleus ; #, mus- 

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

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



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

 pears to me to be the most satisfactory. 



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



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



3 Zeitschriftfur wiss, Zoologie, 1876. 



