596 ZOOPHYTES. 



Cinereous, 8 inches long ; rachis fleshy, with the back smooth ; plume 

 oblong-ovate ; pinnules quite broad, and when contracted long 

 spinous. 



Mediterranean Sea. 



This species is distinguished by the smooth back to the rachis, and 

 the broad pinnules becoming very spinous on contraction, owing to 

 the protrusion of the cartilaginous spicules of the interior. The 

 breadth of the plume is not far from half its length ; and the basal 

 portion is about a third of the whole length. 



Pentia marina phospkorica, Seba, iii. 39, , Esper, iii. 81, tab. 1 tab. 1 A., the 



tab. 1<>, figs. 8 , 8 b. Lamarck refers same after contraction in alcohol, ac- 



this figure to the spinosa. cording to Esper. 



Poma marina grisea, Bohadsch, Mar., , Lamk., 2d cd., ii. 644, No. 3; also 



109, tab. 9, fig. 1,2. P. spinosa (?), No. 4. 



Grey Sea Pen, Ellis, Phil. Trans., liii , , Blainv., Man., 516, pi. 89, fig. 1 . 



1764, tab. 21, figs. 6-10, and P. syti- and Faune Francaise, Zooph., pi. 1. 



nosa, Ellis and Solander, 62. , Delle Chiaje, Anim. scnza vert., iii., 



Pfnnatula grisea, Linn., ed. xii., 1321. pi. 31, figs. 1-3. 



4. PENNATULA ARGENTEA. (Ellis ) 



P. angusto-lanceolata, prcdonga, (interdum \\'}, pinnulis creforrimti, 

 imbricatis, brevibus, dentatis, argenteis. 



Narrow lanceolate and very long (sometimes a foot and a half); pin- 

 nules crowded imbricate, short and dentate, silvery in appearance. 



East Indies. 



Pemtatula argentea, Ellis and Solander, , Esper, Pflanz., iii. 94, tab. 8. 



66, tab. 8, figs. 1-3. The foot, as re- , Lamarck, ii. 645, No. 5. 



presented, is about a third of the whole , Lamouroux, Exp. Meth., 90, tab. 8, 



length, and the greatest breadth about a figs. 13. 



twelfth of the same. It is brilliantly , Shaw, Misc., iv., tab. 124. 



phosphorescent. Penn. elongata, Blainv., Man., 517. 



APPENDIX. Ehrenberg describes another species, under the name 

 Pennatula grandis, as distinct from the argentea of Lamarck, and 

 elongata of Blainville, and refers with a query to a figure in Shaw's 

 Miscellanies, which appears to have been copied from Ellis. It is cha- 

 racterized by him as follows, from an imperfect specimen in the Royal 



