BOWERBANKIA GRACILLIMA. 525 



Habitat. On rocks near low-water mark^ and in shallow 

 water. 



Localities. Ilfracombc, the Tunnels, and dredged off 

 the Capstone (T. H.). 



Bowerbankia GRACILLIMA, Hincks. 

 Plate LXXV. fig. 6. 

 Valkeria GRACILLIMA, Hincks, Ann. N. H. Sept. 1877, 216. 



Stem creeping, rather stout, and sinuous. Zooecia dis- 

 posed in groups of varying size at intervals, slender, 

 elongate-oval when contracted, flask-shaped when the 

 polypide is extended, rounded off below, of a light horn- 

 colour. 



Polypide with 8 tentacles. 



This species is not characterized by any very marked fea- 

 ture, but is very distinct notwithstanding from any form 

 with which I am acquainted. The cells originate on the 

 sides of the creeping stem, but are not regularly biserial ; 

 they are very slender and graceful in form, and are con- 

 siderably larger than those of B. pustulosa and cit?'ina. 

 The gizzard is very conspicuous. Along the back of each 

 tentacle runs a line of very delicate setse ; and two or three 

 stand out very prominently at the extremity. A very 

 long bristle also projects at the base, and is visible 

 standing out on each side at the bottom of the tentacular 

 bell. 



Habitat. On Corallina and stones between tide-marks. 



Localities. Ilfracombe, probably (Leipner): Salcombe, 

 in rock-pools ; Torquay, tide-marks (T. H.). 



