IIETEPOIIA BEANIANA. 391 



Retepora Beaniana, King. 



Plate LIII. figs. 1-5. 



MiLLEPORA CELLULOSA, JciiHeson, Werner. Mem. i. 560. 



Retepora cellulosa, Johnston, Loudon's Mag. N. H. vii. 638, fig. 69. 



Eetepoka Beaniana, King, Ann. N. H. xviii. (1846), 2.37: Johnsf. B. Z. 



ed. 2, i. 353, fig. 67 : JStcs/c, B.M. Cat. pt. ii. 9-4, pi. cxxiii. 



figs. 1-5 ; Crag Pol. 75, pi. xii. figs. 2, 5, 6, & 7. 

 ?Eetepora CELLULOSA (part.), Sars, Rei&e i Lof. og Finm. 31. 

 ? Lepralia lobata, Susk, Crag Pol. 50, pi. vi. fig. 7, pi. xxii. fig. 4 (the 



young state). 

 Retepora cellulosa, forma Beaniana, a, var. boreal ts, Smitt, CEfv, &c. 



1867, Bihang, 34 and 200, pi. xxviii. figs. 217-221. 

 EsCHARA Beaniana, Smitt, Bryoz. Nova Zembla, CEfv. &c. 1878, no. 3, 23. 



Zoarium infuiidibuliform or cup-shaped^ wavy, undulated, 

 the recurved edges sometimes uniting and forming 

 more or less cylindrical cavities; or consisting o£ a 

 broad, spreading expansion, much and irregularly con- 

 torted, the margin sinuated and recessed ; with a very 

 short rudimentarv stem, which rises from a small, 

 subgrauular, incrusting base ; fenestrcB oval, rather 

 large. Zocecia cylindrical, slightly convex, elevated 

 towards the upper extremity ; surface smooth ; orifice 

 (primary) arched above, lower margin almost straight, 

 and in the centre of it a short rostrum, supporting an 

 avicularium, with semicircular mandible directed down- 

 wards ^, two or three minute denticles projecting from 

 the inner side of the avicularium; peristome thin, 

 slightly elevated, and rising on each side of the macro 

 into a small point or denticle ; oral spines in the young 

 cells six, in the older four, tall and acuminate, of which 

 two are situated a little above the lower margin and are 

 visible in front of the ovicell. Dorsal surface subgra- 

 nular, vibicate, traversed by raised white lines ; at the 



* Smitt describes a small, sessile, obliquely placed avicularium, with a 

 triangular mandible, as occasionally developed at the base of the rostrum 

 close to its side. This seems to be very rarely present. 



