PALMICELLARIA SKENEI. 379 



aperture round, somewhat depressed, with a prominent 

 curved rostrum in front, bearing on its upper surface a 

 circular avicularinm . Ooecia unknown. 

 Height -j^ inch. 



HABITAT. Deep water. 



LOCALITIES. Zetland Seas (E. Forbes) : Loch Fyue; 

 the Minch, 18 to 25 miles north of Burrafirth lighthouse, 

 the most northern point in Shetland, 80-90 fathoms 



(A.M. N.). 



This is a very elegant species; slender in habit, of a 

 pure whiteness, and remarkable for the neatness and regu- 

 larity of its dichotomous branching. 



It differs from its congeners in having its cells disposed 

 in four longitudinal series ; but the mere number of the 

 rows is not a point of any special importance. 



PALMICELLARIA SKENEI, Ellis and Solander. 



Plate LII. figs. 1-4. 



MILLEPOHA SKESEI, Ell. $ Sol. Zooph. 135, 



CELLEPORA PALM AT A, Flem. B. A. 532. 



CBLI.KPORA SKENEI, Johnst. B. Z. ed. 2, 297, pi. lii. figs. 6, 7, 8: Busk, B.M. 



Cat ii. 88, pi. cixii. 

 EtiCHARA SKF..XKI, var. TIIIDESS. Busk, Ann. N. H. ser. 2, xviii. (1856), 33, 



pL i. fig. 3 : Sars, Beskr. noreke Polyz., Vid. Selsk. Chris- 



tiania, 1862, 147 (9 sep.). 



LEPRALIA BICORNIS, Busk, Crag Pol. 47, pi. viii. figs. 6, 7. 

 J)I-COPORA SKENEI, forma Eschane auctt. (part.), Smitt, 1. c. 29 and 179. 



Zoariwn rising from a spreading crustaceous base, dicho- 

 tomously branched, of a reddish or yellow colour; 

 branches somewhat palmate, compressed, or flattened, 

 short, dilated and truncate above, rough and hispid. 

 Zocecia elongate, subcylindrical, distinct, and mode- 

 rately convex, elevated towards the upper extremity, 

 and finely granulated; orifice arched above, the inferior 



