24 



ZOOLOGY 



SECT. 



7ttu,s.bds 



on ap 



air up 



stom. 



FIG. 683. Doliolum. Diagram of the sexual form. atr. ap. atrial aperture surrounded by 

 lobes ; atr. cay. atrial cavity ; d. tbc. dorsal tubercle ; end. endostyle ; Id. heart ; int. intestine ; 

 mus. bds. muscular bands ; ne. gn. nerve-ganglion ; or. ap. oral aperture ; or. ovary ; peri, bd . 

 peripharyngeal band ; ph. pharynx ; stig. stigma ; stoni. stomach ; test, testis. (After Herd- 

 man.) 



e,nct 



or.ap 



ort, 



FIG. 684. Salpa democratica, asexual form, ventral view. atr. ap. atrial aperture ; l>mnch y 

 dorsal lamina ; end. endostyle ; ht. heart ; mus, bds. mviscular bands ; ne. gn. nerve-ganglion ; 

 proc. processes at the posterior end ; sens. org. sensory organ ; stol. stolon. (After Vogt and 

 Jung.) 



or.a.p 



stom. 



in. I 



FIG. 685. Salpa, semi-diagrammatic lateral view. an. anus ; atr. ap. atrial aperture ; branch, 

 dorsal lamina ; dors. tubl. dorsal tubercle ; ht. heart ; hyp. hypophj^sis ; lang. languet ; mus. bds* 

 muscular bands ; ne.gn. nerve ganglion ; or. ap. oral aperture ; or. ovary in ovisac ; stom. stomach 

 (After Herdman.) 



