112 ATEACTYLIDyE. 



tervals from the creeping stolon, find sending off short 

 branches, which are for the most part without further 

 ramification ; POLYPARY light brown, slightly corrugated, 

 with a well-marked cup-like dilatation at the base of the 

 polypite ; POLYPITES light reddish brown, with about 1 6 

 tentacula held, in extension, alternately elevated and 

 depressed; GONOPHORES borne on a rather long pe- 

 duncle, and springing from the branches a little behind 

 the polypite. 



GONOZOOID. UMBRELLA (at the time of liberation) dome- 

 shaped ; MANUBRIUM extending to about a third of the 

 depth of the umbrella. 



THE free zooid is in all points undistinguishable from that 

 of B. ramosa. The present species is known by its " small 

 size and general habit, its more simple ramification, and 

 the fact that its stems consist of a single tube, instead of 

 being composed of numerous tubes coalesced into a dense 

 bundle." (Allman.} 



Hub. In a rock-pool, Torquay, where it occurred abun- 

 dantly, creeping over the bottom in small moss-like tufts 



(j. a A.). 



I have met with a form in various localities which is 

 somewhat intermediate between this species and B. ramosa 

 (Plate XIX. fig. 3). It is of small size, not exceeding an 

 inch in height ; the main stem is compound towards the 

 base, but still slender as compared with that of the latter 

 species. The ramification is simple, the branchlets being 

 regularly alternate and approximate. The colour is a 

 light yellowish brown, and the polypary has the appear- 

 ance of being sanded over. The main branches are less 

 distant than in B. ramosa and are not compound, and the 

 whole habit is simpler and more delicate. The composite 

 portion of the stem is slender, and does not extend far. 

 It is made up of very delicate tubules. 



Long fusiform bodies, supported on separate ramuli, 



