532 THE ANATOMY OF INVERTEBRATED ANIMALS. 



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

 servations of the last-named author relate chiefly to Salpa 



Pig. 152.— Salpa democratica-mucronata. — I. Salpa democratica. IT. 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 ol 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, hypopharyngeal band in a so-called" branchia ; " /> 

 languet; (/, heart ; h, gemmiparous stolon ; i, visceral mass or nucleus ; k, mus- 

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

 ciliated sac ; 02, 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 " Nachriehten der Koniglichen Gesellschaft zu Gcttingen," 1868. 



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

 8 Zeitschrift fur wiss. Zoologie, 1870. 



