68 ANTHOZOA HYDROIDA. 



bright yellow colour. It creeps on fucus's. The ovaries differ from 

 all the rest of the genus : they are lobated, and the lobes are placed 

 opposite to one another : these appear to be full of spawn, of a deep 

 orange colour, which is sent forth from holes at the end of the lobes." 

 Ellis. 



6. S. NIGRA, pinnate, blackish ; cells opposite or subalter- 

 nate, adherent, tubulous, with a plain rim ; vesicles large, 

 unilateral, pearshaped. Pallas. 



PLATE XII. FIG. 1, 2. 



Sertularia nigra Pall. Blench. 135. Couch Zooph. Corn. 8 : Corn. Faun. iii. 20, pi. 6. 



Hob Ad Promontorium Lacertae, Cornubise, reperitur, Pallas. 

 " Though not so generally diffused as many others, it is far from 

 being uncommon in particular localities. Off the Deadman-point it 

 is found, though rarely ; at a few miles west and north-west of the 

 Eddystone lighthouse it is common, and from that locality I have 

 obtained some exceedingly fine specimens, which, from January to 

 May, have abounded in ovarian vesicles," R. Q. Couch. Devonshire, 

 Mrs. Griffiths. 



Polypidom robust and erect, from three to six or even eight inches 

 in height, pinnate, somewhat lanceolate, of a blackish-brown colour 

 when dried, sometimes partially tinted with red, varnished. Boot- 

 fibres tortuous and wrinkled, entangled, anastomosing, rising up on 

 the rachis sometimes to the origin of the pinnae. Rachis simple, 

 straight, and firm, sensibly tapered towards the top, compressed, 

 jointed at short and pretty regular intervals, and denticulated up 

 the sides : Pinnse originating from the flattish sides by a narrow 

 base, linear, often very much elongated, mostly alternate but some- 

 times opposite, serrated : Cells (fig. 10, a) small, crowded, opposite, 

 or semi-alternate, biserial and lateral, tubulous, adnate, the upper 

 half scarcely free and very slightly everted, the aperture wide and 

 even : Vesicles large and numerous, produced from the upper edge 

 of the pinnse, and hence ranged in a line : they are subsessile, smooth, 

 and varnished, pear-shaped, divided into four equal parts by longi- 

 tudinal dissepiments meeting on the apex, which is sometimes 

 obtuse and sometimes rather acute and of a pitchy-black colour. 

 " This form of the vesicle is rarely observed except when it has 

 arrived at perfection, but in a less advanced state the upper portion 

 is flat, and the circumference irregularly lobulated." R. Q. Goucli. 



" This species, as it is seen in collections, is of a dark or black- 



