50 ACALEPHA. 



ending in 4 leaf-like, furbelowed arms, united at 

 the base ; 4 ovaries ; appendages to the stomach 

 without orifices. 



P. cyanella. Fig. 82 ; f . 



FAMILY II. KHIZOSTOMAD^. 



Cassiopea (Per.). Umb. hemispherical, de- 

 pressed, without marginal tentacles ; ovaries 8 ; 

 no peduncle, but a central disk, with 4 or 8 half- 

 moon-shaped orifices at its sides, and sending off 

 8 or 10 much-branching arms, which are fringed 

 with retractile, stalked, sucking disks. 

 C. lunulata. Fig. 83 ; y L. 



Rhizostoma (Cuv.). Ovaries 4; peduncle with 

 4 or 8 half-moon-shaped orifices, formed by 4 

 pillars dividing into 8 cartilaginous arms, without 

 fringes. 



R. pulmo. Fig. 84 ; ^ 



Order II. GTENOPHOEA. 



With a chamber on each side, containing 

 a long, very extensile and contractile fila- 

 ment Callianiradte. 



With no chambers or filaments . . . Beroida. 



FAMILY I. CALLIANIKAD.E. 



Gydippe (Esch.). Body globose; with no swim- 

 ming-lobes or oral tentacles. 



C. pileus. C. lagena. 



Flemingii. pomiformis. Fig. 85 ; n. s. 



infundibulum. 



