216 



BUNODID^. 



invariable accompaniment of disease and death in crassi- 

 cornis ; these organs are present in unusual profusion, and 

 are forced out at ruptures of the integument, by the con- 

 tractions of the animal. The mesenteric membrane by 

 which they are united to the septa is capable of great 

 expansion: Sir John Dalyell has seen it protruded and 

 spread up the side of a glass vessel, to the breadth of an 

 inch. I have seen a similar phenomenon, but not quite to 

 the same extent, in Peachia hastata. 



As in the case of A. mesembryanthemiim, the ubiquity of 

 this species renders a catalogue of its localities unnecessary: 

 it is distributed everywhere on the British coasts. 



Of foreign species, so far as may be conjectured from 

 published figures and descriptions (often imperfect), the 

 following may belong to this genus : Artemisia (Dana) 

 from N. W. America ; pluvia (Dana) from Peru ; gemma 

 (Dana) from Cape Verd Isles ; pajrillosa and ocellata 

 (Lesson) both from Peru; and fusco-rubra (Quoy et Gaim.) 

 from the Tonga Isles. Of these the first-named seems 

 intermediate between the present species and B. thallia. 



B. thallia. 



Tealia Gbeenei (Wright). 



Dr. E. P. Wright finds on the Irish coast a Tealia, 

 which he thinks new, and for which he proposes the name 

 of T. Greenei. The parapet is much smoother than in 



