38 



ZOOLOGY 



SECT. 



SO far as known, a taiUnl larva, cxcc])t in the genus AnuneUa of 

 the Molfjiblidcc — a family of the sini|)l(' I'onus, in which the tailed 



/vl 



,ti^ 



e-Trd adh 



B 



reel 



a-Tr '^■'^"^M 



or 



Tioto 



ht ^tvff &n.d 



Fig. f 36.— Diagram of the nictainoiphosis of the free tailed hirvainto the fixed Aycidian. A, stage 

 of frec-swininiiiig larva; fl, larva recently fixed ; C, older fixed stage, adh. adhesive papillaj ; 

 air. atrial eavity ; c//. ///•. eiliated divcrtieiiluni, liecoining ciliated fimiiel ; tail, eiidostyle ; 

 M. heart ; mal. ganglion of trunk ; n. ijii. uerve-gangliou nolo, notoehord ; oi\ oral aperture ; 

 rect. rectum ; *ms. res. sense-vesicle; Hig. stigmata; Uol. stolon; t. tail. (Prom Korsehelt 

 and Heider, after Seeliger.) 



stage is wanting and there is only an obscure endodermal rudiment 

 to represent the notoehord. 



