BEANIA MIRABILIS. 97 



the mouth; spines 7-10^ on each side of the aperture ; 

 the connecting tube slender and smooth ; opposite 

 branches given off from the base of the cells. 

 Polypide with 20 tentacles. 



Range of Variation. This seems to be very narrow. 

 The only difference I have observed which is worth 

 noting is in the number of the spinous processes on the 

 margin of the aperture. Johnston gives it at 5-7, but 

 it often reaches 10 or even more ; 8 or 9 seem to be the 

 usual q^^ota in well-developed specimens. The uppermost 

 pair are stouter than the rest and suberect. 



Habitat. On weed (especially Laminaria) , zoophytes, 

 shells, stones, &c., between tide-marks ; more rarely on 

 shells from deep water. 



Localities. Scarborough, on shells and rock, and on 

 Cellularia {Bugula) avicularia at or within low-water 

 mark (Bean) : dredged off Scilly, on Pecten maxhnus 

 (M' Andrew) : Peterhead and Wick, very rare (C. W. P.) : 

 off the coast of Antrim, on Pectunculus (Hyndman) : Filey, 

 on shell brought in by fishermen ; Lamlash, Arran ; Isle 

 of Man, on weed ; Swanage, on Laminaria ; off Lul worth 

 Cove, in shallow water; Ilfracombe, common, on stones 

 in rock-pools ; Exmouth, on Bugula turbinata, Laminaria, 

 &c. ; Torbay, stones between tide-marks ; Herm, plenti- 

 ful; Guernsey; Plemont, Jersey (T. H.) : Sidmouth 

 (Mrs. Gatty) : Eastbourne (Roper) : Hastings, rare 

 (Miss Jelly) : ShankHn, Isle of Wight (H. Lee) : off 

 Falmouth, on a crab-float (Cocks). Not recorded from 

 Shetland. 



Geographical Distribution. Scandinavia (Loven and 

 Smitt) : Adriatic, at Lesina, on an Alga, one specimen 

 (Heller) : Roscoff, dredged, and at low-water mark 

 ( Joliet) . 



