1002 Microscopical Society of London. 



three small dark spots on the inner margin : posterior wings brown, 

 cilia yellowish : the above description is taken from a male specimen ; 

 the female, which appears rare, is of a plain testaceous red, with the 

 extreme costa slightly white. 



Found about whitethorn hedges in July. 



I have described above all the British species of Lozotaenia with 

 which I am acquainted. Several closely allied species are common 

 on the continent, which, I have no doubt, may eventually be found 

 in this country. Up to the present time these insects have been 

 much neglected : they are usually called " common oblique bars," 

 and collectors seldom take the trouble to secure them. 



The three Linnean species of Tortrix, named Cruciana, Schreberi- 

 ana, and Holmiana, have been described as belonging to the present 

 genus ; but they depart so considerably, in many essential charac- 

 ters, that I thought it best to exclude them. 



William Bentley. 

 3, Critchell Place, New North Road, 

 1st May, 1845. 



Microscopical Society. 



April 23, 1845. John Birkett, Esq. in the chair. 



Read, a paper by J. S. Bowerbank, Esq., F.R.S., &c, entitled 

 " Description of a new Genus of Calcareous Sponge." 



The subject of this paper was found attached to the stem of a 

 new species of coralline received by the author from Mr. George 

 Dunsterville, surgeon, of Port Elizabeth, Algoa Bay, after whom it 

 has been named. It was found on the beach at Cape Receif, above 

 ten miles from the town. Its description is as follows : — 



Dunstervillia. Generic character. Sponge calcareous, outer sur- 

 face arranged in polygonal plates or compartments. Body composed 

 of simple, straight, angulated canals, radiating from the central 

 axis of the sponge. 



D. elegans. Sponge sessile, sacculate, compressed, ventral orifice 

 single, terminal, surrounded by a single or a double fringe of erect, 

 simple, asbestiform spicula. External oscula indistinct Spicula 

 of the body simple, double-pointed, triradiate. 



Although closely approximating to the genus Grantia of Dr. 

 Fleming, its structure is so peculiar as to justify the author in his 

 opinion in making it the type of a new family ; and the more so, as, 

 although he is acquainted with no recent analogue, yet there is a 



