EXPLANATION OF PLATE XXXIIL 



Figure 24C.-Cynthia partita, variety stellifera, (p. TOl ;) natural size 

 247.— Cynthia caruea, (p. 701 ;) natural size. 

 248.— The same, (p. 701;) younger specimens, natural size. 

 249.— Eugyra pilularis, (p. 700 ;) natural size. 



250.-Molgula Manliatteusis, (p. 699;) smooth variety, natural size 

 251.— Molgula arenata, (p. 699 ;) natural size. 

 252.-Botryllus Gouldii, (p.702;) colony incrusting the stem of Tubuiaria, 



somewhat enlarged. 

 2r,3.-The same ; one of the zcoids, enlarged ten diameters ; a, anal tube and 

 orihce ; s, stomach ; g, groove and vessels along the edge of the branch- 



or;. e \ T[ '"'"^*' ' ''' ^^^^ ''''^'^ ' ^' ^"^^' ^^'i^I^ed by a slender stolon. 

 254.-Sa Ipa Cabotti, (p. 706;) solitary individual, from the dorsal side, enlarged • 



A, heart ; s, small chain of salpre budding within the old one " ' 



2o5.-Thesame; one of the individuals from a mature chain, three-quarter 



view enlarged; «, posterior or anal opening; ^ anterior or branchial 



opening; c, processes by which the individuals of the chain were 



united ; /;, heart ; «, nervous ganglion ; o, nucleus ; r, crin. 



256.-Escharella variabilis, (p. 71.3 ;) few of the cells, much enlarcred 



<^rl^rf K^:^7" "' ^- ""'"''-' ''' '''' ^^^^^" -pic. fro. ^.^,a.izrthe others were 



