274 Z. ASCIDIOIDA. Cellepora. 



mass, encrusting- submarine bodies, rarely exceeding an inch in length, 

 usually round when small, more or less oblong and knobbed when 

 large. It is rough, when quite recent of a pinkish colour, dirty-white 

 when dry, rarely tinted with purple. The aperture of the cells is 

 often toothless, but in a perfect condition a short mucro projects 



from the superior margin, and often a lesser one on each side. 



Linnaeus' description under C. pumicosa is scarcely applicable, but 

 his quotation of Ellis's figure determines the species he had in view. 

 There can be little doubt that his C. verrucosa — " cellulis suhrotun- 

 do-glomeratis ovatis ore suhtridentato" — belongs to the same species, 

 although Blainville considers it synonymous with the Discopora ver- 

 rucosa of Lamarck. 



2. C. RAMULOSA, dichotomously branched, the branches cy- 

 lindrical, rough ; cells irregularly clustered^ loith a mucro on the 

 outer edge of the aperture. Pallas. 



Plate xxxii. Fig. 4, 5. 

 Cellepore ramulosa, Lin. Syst. 1283. Mull. Zool. Dan. prod. 253, no. 

 3049. Bosc, Vers, iii. 148. Flem. Brit. Anim. 532. Johnston in 

 Trans. Newc Soc ii. 267, pi. 12, fig. 3, 4. Lam. Anim. s. Vert. 2de 



edit. ii. 258 La C. rameux, Blainv. Actinol. 443. 



Hah. In deep water, attached to old shells, " not rare," Fleming. 

 Lizard Point, Cornwall, Pallas. On Serpula tubularia from the coast 

 at Dunstanborough Castle, 3Ir R. Emhleton. Coast of Berwick- 

 shire, occasionally, G. J. 



Polypidom attached by a spreading base, calcareous, white, light 

 and porous, rising to the height of between 2 and 3 inches, branch- 

 ed from the base, the branches bifid, spreading, cylindrical, the ulti- 

 mate ones a little attenuated at the apex, very rough with the mu- 

 cronate cells, which are urceolate, without any very regular arrange- 

 ment^ the aperture contracted, the mucro about as long as its diame- 

 ter. Pallas (Elench. 233,) and Ellis (Soland. Zooph. 136,) con» 



sidered this a variety of the preceding. The polypes are of a faint 



red or flesh coloiir, with two darker spots indicating the position of 

 the stomach and ovary ; tentacula numerous, filiform. 



3. C. Skenei, much compressed, divided in a bifid manner, 

 rough ; cells roived, with a strong mucro on the outer edge of the 

 7'ound aperture. Dr David Skene.* 



Plate xxxii. Fig. 6, 7, 8. 



* " Dr David Skene — after a short time of study at Paris, in addition to the 

 more ordinary preparations — settled as a medical practitioner in Aberdeen, where 



