RETEPOEA COUCHII. 395 



Retepora Couchii, Hincks. 



Plate Lni. figs. 6-11. 



Eetepora Beaniana, Hincks, Devon Cat., Ann. N. H. ser. 3,ix. 308 (50 sep.). 

 Retepora Couchii, id. Ann. N. H. ser. 5, i. (1878), 355, pi. xviii. figs. 



1-6: Waters, Bryoz. Bay of Naples, Ann. N. H. ser. 5, iii. 



200, pi. V. figs. 3-6. 

 Retepora cellulosa, var. Beaniana, Mamoni, Bryoz. foss. Ital., Quart. 



Contr. 19, pi. V. fig. 26 (Sitzb. k. Akad. d. Wissensch. 



Bd. ixi. 1. Abtb., Marz-Heft, 1870). 



Zoarium irregvdarly cup- shaped, undulated and contorted, 

 with a sinuated margin, hispid ; fenestra smaller than 

 in the last species and less regularly oval. Zooecia sub- 

 cylindrical, depressed, except at the upper extremity, 

 surface smooth ; orifice semielliptical, the front margin 

 produced into a tall rostrum, broad below and narrow- 

 ing towards the apex, much bent outwards, and bearing 

 on its summit a minute avicularium, with rounded man- 

 dible ; peristome elevated on one side of the rostrum 

 into a broad, wing-like process, produced at its upper 

 and outer angle into a spine ; a narrow, slit-like fissure 

 between the rostrum and the process, closed above, but 

 forming a loop-like foramen below ; oral spines six ; 

 elongate, linguiform avicularia, with a very delicate 

 mandible, distributed over the zoarium, frequently one 

 on the front of the cell at one side, a little below the 

 rostrum ; dorsal surface smooth, dense, with many 

 small subcircular avicularia, and occasionally one of the 

 linguiform kind, irregularly placed. Ocecia elliptical, 

 smooth, with a narrow longitudinal fissure. 



Height (of the largest specimen) a little more than ^ inch, 

 breadth about | inch. 



Habitat. On stone, &c., deep water. 



Localities. Ofi" the Land's End (R. Q. Couch) : South- 

 west of Polperro, 4*0 fathoms, on stone (T. H.) : Guernsey 

 (A. M. N. & Dr. M'lntosh). 



