EXPLANATION OF PLATE XXXIII. 



Cynthia partita, \ariety stellifera, (p. 701;) natural 



247,Cvnthia carnea. ^>. ?<)! :) natural si/e. 



M \- i . Th ->;inie. (i>. TtM :,) younger specimens, natural f 



249. Eugyra pilularis, (p. TOO ;) natural size. 



250. Molgnla Manhattensis. , ].. tl'.i'J:) smooth variety, natural size. 



'Jf>l. Molj^ula areuata, (p. GDI);) natural si/.r. 



2;V2. Botryllus (jnuldii, (p. ?0v{ :) colony incrusting the stem of Tubularia, 

 somewhat enlar^-d. 



% J.")!?. Tlu- same; one of the zoi>icl8, enlarged ten diainctt-rs : o, anal tube and ori- 

 liro; *, somach ; <y, groove and vessels along the edge of the branchial 

 . inside : o. It-it ovary ; /;, bud. attached by a slender stolon. 



2fi4. Sal pa Cabot ti, (p. 70(' :) solitary individual, from the dorsal side, enlarged ; 



/*, heart; *, small chain of salpffi budding within the old one. 

 ".The same; one of the individuals from a mature chain, three-quarter 

 view enlarged : n, ]Msterior or anal opening; ft. anterior or branchial 

 opening: c, jiroeesses by \vhich the individuals of the chain were 

 united : h. heart : //. nervous ganglion : o. nucleus ; r, gill. 



and. r.scharella variabilia, (p. 71:'. : lie cells, much enlarged. 



(Kicuro 2. r i(i was drawn by A. Hvsitt ; ^."4 aiul v2r.r> \vrn- . : lie utbt-rs wi-it- 



drawn by A. E. Verrill.) 



