622 VESICULARIID.E. 



and produced at the base into a short, pointed, caudate 

 process, which bends outwards ; disposed in companies 

 along the creeping stem. 

 Polypide with 8 tentacles. 



IN the original account of this species I have stated that 

 I had been unable to detect a gizzard. But I have since 

 had the opportunity of examining a considerable number 

 of well-preserved specimens ; and I find that this organ is 

 present and well-developed, and that the structure gene- 

 rally agrees with that of Bowerbankia. 



The cells are much smaller and slenderer than those of 

 B. imbricata, and are not so broad and squarish at the top 

 as the latter. Below they terminate in a pointed, some- 

 what spur-like extremity, which is very conspicuous in the 

 youngest cells, but is often less apparent in the adult. The 

 cell is attached at a point a little above the base ; and the 

 extremity commonly bends outwards. Normally the zocecia 

 are disposed in separate groups or companies along the 

 stem, and are placed opposite to one another with much 

 regularity; but in certain states they are more crowded 

 together, and the clusters almost blend. 



I have little doubt that B. caudata will prove to be far 

 from uncommon; it has probably been confounded with 

 B. imbricata. 



HABITAT. On Algae, from moderate depths. 



LOCALITY. Ilfracombe (Leipner). 



BOWERBANKIA PUSTULOSA, Ellis & Sol. 

 Plate LXXVI. figs. 1-5. 



DICHOTOUOUS TUBULAR CORALLINE, Ell. Corall. 54, pi. ixvii. fig. e, B. 

 SEKTULARIA PUSTULOSA, Ell. $ Sol. Zooph. 54 : Flcm. Br. An. 551. 

 VESICULARIA PUSTULOSA, J. V. Thompson, Zool. Illust. 99, pi. i. figs. 5-11. 

 VALKERIA PUSTULOSA, Johnst. B. Z. ed. 2, 370, pi. Ixvii. figs. 7-9 : &o. 



