PLUMULARIA CATHAR1NA. 



299 



Fig. 34. 



wide to allow of the egress of the mature planulae ; the 



ova are arranged in lines, and form a 



compact mass, occupying the greater 



part of the cavity. The male is smaller, 



according to the general rule, and very 



slender, wanting the long neck, and 



with a minute orifice at the top* 



(Woodcut, fig. 34, 0, male ; b, female) . 



Hub. On weed, zoophytes, rock, &c., 

 from the littoral zone to deep water; 

 generally distributed. 



Branched var. Malahide (Macalla): Cornwall (T. H.). 



[On Phallusia intestinalis, at Messina (Sars): Belgium, 

 on Laminaria (Van Ben.).] 



3. P. CATHARINA, Johnston. 



PLUMULARIA CATHARINA, Johnst. Mag. Nat. H. vi. 498, figs. 61, 62 ; Brit. 



Zooph. 97, fig. 1 (p. 3), fig. 17 (p. 98) ; Agassiz, N. H. U. S. 



iv. 358. 



AGLAOPIIENIA CATHARINA, Gray, Cat. B. M. Radiata, 81. 

 ?SERTULARIA SECUNDARIA, Cavolini, Pol. Mar. (German tr.) 105, pi. viii. 



figs. 15, 16. 



Plate LXVI. fig. 2. 



SHOOTS clustered ; stems straight or slightly curved, deli- 

 cate, and pellucid ; pinna opposite, simple or pinnate, 

 the pairs distant ; HYDROTHECVE deep, with an even mar- 

 gin, separated by two joints, borne on the main stem as 

 well as on the pinna; NEMATOPHORES tapering doivn- 

 wards, expanding into a wide-mouthed cup above, one 

 on each side of the calycles, pedunculated, and, two or 



* Sir John Dalyell, by a curious blunder, has treated Plumularia setacea 

 as a portion of Antennularia ramosa, upon which he found it parasitic, and 

 regards the " ampullate vesicles " as a second kind of reproductive body be- 

 longing to the latter zoophyte (Rare and Rein. An. of Scotland, vol. i. 

 p. 205-9, pi. xxxix. figs. 9, 10). 



