120 CATALOGUE OF THE MOLLUSCA 
As this species has had the misfortune to be much misunder- 
stood, we have thought it desirable to give the synonyms of dif- 
- ferent authors. Philippi published it in the first volume of his 
“Enumeratio Molluscorum Siciliz,’ underthe name of B. angustata, 
but changed it in the second volume to B. punctata, Adams, and 
quotes B. catena, Mont., as a synonym. 
4. B. quaprata, S. Wood. 
Bulla quadrata, Wood in Charlsw. Mag. Nat. Hist. iii. 460, 
eed 
Philine scutuluwm, Lovén Index Moll. Scand. 9. 
Shell white, sub-diaphanous, globoso-quadrangular, rounded on 
the back and a little constricted above ; covered with catenated 
spiral striz, and having, in fresh specimens, one or two faint opake 
bands. Apex subtruncated, sunk in the centre, but not umbili- 
cated, exposing scarcely one volution. Aperture large and wide, 
occupying nearly the whole of the shell: outer lip expanded 
above, and nearly straight at the side, the edge thin and slightly 
crenulated by the striae ; a little angulated below; base wide and 
nearly straight ; inner lip thin, bent a little above from the 
bulging of the body whorl into the aperture, not reflected but 
having a pretty strong margin of enamel laid over the whorl. 
Length + in., breadth 2-tenths. 
Of this interesting species a few fine specimens have been 
obtained at Whitburn, by the Rev. G. ©. Abbes and Mr. R. 
Howse. It adds another to the species found fossil in the Crag, 
which have lately been ascertained to be still living in our seas, 
Bulla quadrata differs from B. catena in the more globose and 
subquadrate form ; also in having the apex broader and more 
depressed. In outline it more nearly resembles B. aperta. We 
have inserted a description of the recent shell, as its characters 
have not been all distinctly made out from the fossil. 
5. B. prurnosa, Clark. 
Bulla pruinosa, Clark in Zool. Journ. 111. 339. 
A specimen of this rare species was dredged by Mr. R. Howse, 
off Whitburn, and another has also occurred to him in the sto- 
mach of a fish. 
Bullcea aperta is included in Sir C. Sharp’s list of Hartlepool 
