158 DISCOPHOR^. Part III. 



D. Couthouyi Ag. The pointed tubercles of the cupola, and the 

 whole margin of the disk, are papillate. — Wilson's Island (J. 

 P. Couthouy). 



Hidroticus Ac/. — Eight short, foliated arm,s, terminating in eight 

 short, club-shaped tentacles, hanging among the foliaceous 

 appendages. Margin of the disk crenulated. Named in re- 

 membrance of LeSueur, whose name is hellenized. 

 H. rufus Ag. Disk pale, rufous, dotted with whitish specks; mar- 

 gin deeper. Arms rufous, with small, sparse, white papilte ; 

 their club-shaped termination diaphanous, with a fine blue 

 band near the tip. — Straits of Sunda (W. W. Wood). From 

 a drawing and notes by Mr. W. W. Wood. 



C ty 1 r h i z a Agass. — Cejjhea Per. and LeS. — Cassiopea Delle Ch. — 

 Rhizostoma Less. 



Morphologically considered, this genus is a Cephea, with 

 pedunculated suckers and without cirrlii. It cannot be re- 

 ferred to the family of Cas.siopeida3, with which Delle Chiaje 

 had associated it, since it has only four genital sacs ; nor 

 to that of Rhizostomidse proper, with which Eschscholtz had 

 united it, since it has a central disk and no pillars. 

 C. tuberculata Ag. — Medusa tuberculata 3Iacri. — Cephea tubercu- 

 lata Esch. — Cephea polychroma Per. and LeS., Lmlc, DeBL, 

 Risso, Less. — Cassiopea borbonica Delle Chiaje, Memorie sulla 

 Storia e Notomia, &c.. Pis. 3 and 4; copied by Milne-Edwards 

 in Cuvier's Regne An., PI. 51, fig. 2. — Rhizostoma borbonica 

 Esch., Less. — Naples (Peron and LeSueur and Macri) ; Nizza 

 (Risso). 



Phyllorhiza Ag. Allied to Cotylorhiza, but the eight arms divide 

 into three fringed lobes, like the leaves of clover, instead of 

 being dichotomous, with numerous pendant filaments. 

 Ph. chinensis Ag. Disk papillous or tuberculated, the tubercles 

 pearly and the interstices transparent, giving it a beautiful 

 reticulated appearance ; the tubercles larger toward and on 

 the summit of the disk. Eight narrow lobes, respectively, 

 between the eight eyesj lobes reddish brown, horizontally 

 lineate with dai'ker streaks. Arms finely punctured, reddish 

 beneath ; filaments reddish, with whitish, opaque dots. — China 

 Seas (W. W. Wood). From a drawing and notes by W. W. 

 Wood. 



