220 NORMAN, ON RARE BRITISH POLYZOA. 



generally diifused than B. avicularia, with which it was 

 formerly confounded. Specimens from under the granite 

 rocks at Herm are most beautifully developed. 



Flustra Barleii, Busk. 



Flustra Barleii, Busk. Quart. Jour. Mic. Sci.. vol. viii 



(1860), p. 123, pi. XXV, fig. 4/ 

 — membranaceo-truncata, Smitt. Ofversigt af K. Vet. 



Akad. Forh. (1860), p. 358, 

 pi. XX, figs. 1 — 5. 

 The polyzoary in this species is very thin ^nd remarkably 

 brittle. The species is very scarce in Shetland. Much as I 

 have dredged there, I have only met with a few fragments in 

 about fifty fathoms off" Unst, and the original examples pro- 

 cured by Mr. Barlee still remain the only good ones in my 

 collection. It has very recently been described by Smitt 

 from Arctic specimens. 



ESCHARA ROSACEA, Busk. PI. YI, figS. 10 — 12. 



Eschara rosacea, Busk. Ann. Nat. Hist., 2nd ser., vol. xviii, 



p. SS, pi. i, fig. 4. 

 Escharoides rosacea, Smitt. Ofversigt af K. Vet. Akad. 



Forhand. (1867), Bihang, j). 25, pi. 

 xxvi, figs. 155 — 159. 



Polyzoary consisting of flat, subpalmate, foliaceous lobes, 

 composed of two layers of cells placed back to back ; the 

 lobes variously curved, and not in the same plane. Cells 

 elongated ovate, granulated, only slightly convex, quin- 

 cuncially arranged ; mouth sunken, well arched above, with 

 a sinus on the lower lip, and an avicularium, which has a 

 lateral direction, appearing on one side of the sinus ; man- 

 dible semicircular. Ovicell semiglobose, granulated. 



Loch Fyne, on small stones and old shells of Pecten oper- 

 cularis, now first added to the British Fauna. Known pre- 

 viously on the coast of Norway, where it has been procured 

 by McAndrew ; Finmark (Loven) ; Spitzbergen (Malmgren). 



The size of a large British specimen is three quarters of 

 an inch broad, and not quite as high. Figs. 10 and 11 are 

 drawn from a British specimen ; fig. 1 2 is added to show the 

 ovicells, and is taken from a Norwegian typical example sent 

 to Mr. Alder by Mr. Busk.; 



According to Smitt, the Eschara rosacea of Sars is not 

 Busk's sjDecies, being distinguished from it by having the 

 mandible of the avicularium triangular, and he has named 

 it Escharoides Sarsii. 



