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 



ife^s" 



Fig. 152.— Salpa democratica-mucronata.—I. Salpa democratica. IT. Salpa mucro- 

 nata. III. A fretal 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 : e, 

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

 lan«nief 7, heart ; h, genimiparous stolon ; i, visceral mass or nucleus ; «, mus- 

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

 ciliated sac ; «, celeoblast ; a, ectoderm and test ; 0, endoderm. 



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

 pears to me to be the most satisfactory. 



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



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



3 Zeitschriftfur wiss. Zoologie, 1876. 



