NOTES ON SAGARTIIDiE AND ZOANTHID^E FROM PLYMOUTH. 213 



Colony (a) consists of two large primary polyps growing from a 

 centre, away from one another, and in the same plane ; two secondary 

 polyps arising in a similar manner at right angles to the first pair, 

 and two smaller tertiary polyps arising from the bases of the primary 

 pair. 



Colony (b) is formed upon the same plan, but is more irregular in 

 growth, and consists of seven polyps. 



Greatest length of colony (a) 40 mm., largest polyp 20 mm. in 

 length, and 5 mm. in width at the summit, and 3 mm. at the base. 



Breadth of colony 22 mm., the polyps 10 mm. long. Tertiary 

 polyps 5 mm. Measurements of (b) very similar. 



In both colonies there were swellings at the base of the secondary 

 polyps, indicating further branching. 



Body wall strongly incrusted with sand, a few folds on or below 

 the summit of the larger polyps. 



Capitular ridges, 15 or 16, not strongly developed. Spaces between 

 the ridges unincrusted. 



Disk not visible. Tentacles partly retracted, stout, and white, 26 

 visible in one and 24 in another. Mr. A. J. Smith informs me that 

 they were of an orange-red when fresh. 



These specimens are evidently identical with that described by 

 Holdsworth, and which was also obtained in the neighbourhood of 

 Plymouth. 



An anatomical examination was not attempted, as owing to the 

 amount of incrusting sand, and the fact that the specimens had been 

 five years in formalin, the result would be certain failure, to judge by 

 an experience with U. incnistattis, besides mutilating the colonies. 

 Fresh and less incrusted examples must be awaited and hoped for. 



In the meanwhile I agree with previous writers as to the close 

 affinity of this form with E. coucliii. 



Parazoanthus dixoni, Haddon and Shackleton. 



One colony, preserved in alcohol. The label reads : " Millbay 

 Channel, December 1st, 1902." 



This colony, which consisted of over 50 polyps, had evidently been 

 torn off a rock by the dredge, as fragments of stone and Balanus were 

 found still adhering to the ccenenchyme. 



Greatest length of colony 35 mm., breadth 27 mm. Height of 

 largest polyps 10 mm., diameter 4 mm. Ccenenchyme soft, spongy, 

 and abundant. Polyps rather crowded. Body wall slightly wrinkled, 

 owing to the contraction of the polyps. 



