KENNAED & WOODWARD : BRITISH PLIOCEIfE NOJT-MAEINE MOLLUSCA. 199 



Testa parvula, ovato-conica, apice perobtuso, basi oblique rimata ; 

 anfractus 4, leviter convexiiisculi, Iseves, sutura impressa, ultinius vix 

 inflatior et paiilo deflexus circa | partem altitudinis totius adsequans. 

 Apertura obliqiia, ovalis, superne acuminata, marginibus continuis, 

 simplicibus, columellari subrecto, subreflexo. Operculum ignotum. 

 Long. 2, diam. 1 mm. 



Form, and Loo. — Norwich Crag : Blake's Pit, Bramerton (Brit. 

 Mus. and Norwich Mus.). 



This, although it bears some resemblance to the figures of P. ohtum 

 given by Sandberger, proves on comparison with specimens kindly 

 sent for the purpose by Dr. Boettger to be a diiferent shell. The 

 latter is 3 mm. long by about 1-25 mm. in diameter, and its last whorl 

 is much larger than the preceding one, whereas in the present species 

 they are nearly equal in size. P. Reevei, too, has a far blunter spire, 

 less convex whorls, a more oblique aperture, and no similar thickening 

 on the outer lip. It is by no means a common shell, only about 

 a dozen specimens being known ; all of these have been foimd by 

 Mr. Beeve, after whom we have great pleasure in naming this form, 

 since by his pei'sistent work he has greatly extended our knowledge 

 of the molluscan fauna of the Norwich Crag. 



29. Bythinia tentaculata (Linn.). 

 Paludina tentaculata, Linn. : S. V. Wood, Crag Moll., vol. i, p. Ill, 

 pi. xii, fig. 2. 



Form, and Log. — Norwich Crag : Norwich; Bramerton Common and 

 Blake's Pit, Bramerton (Norwich Mus.) ; South wold (Brit. Mus.) ; 

 Bulchamp (S. Y. Wood). 



This is a very rare forni in the Crag, although so abundant at the 

 present time. On the continent it is first known from the lower 

 pliocene (Congeria Beds) of Bruchstiick, and it is also recorded from 

 the middle pliocene of Hauterive, Trance. 



30. YlVIPARA GLACIALIS (S. V. Wood). 



Paludina glacialis, S. Y. Wood : Crag Moll., Suppt. I, p. 68, pi. iv, 

 fig. 14, and pi. vii, fig. 25. 



Form, and Loc. — Norwich Crag: Coltishall (S. Y. Wood). 



The only evidence of the occurrence of this form in the pliocene of 

 England is the statement by Mr. S. Y. Wood that a single example 

 was found by Mr. H. Norton in the Norwich Crag of Coltishall. This 

 example we have been unable to trace. There are three specimens in 

 the Searles Wood Collection at the British Museum (Natural History), 

 all of which are of pleistocene age, two being from Belaugh and one 

 from Hopton. One of the Belaugh specimens is figured (Crag Moll., 

 Suppt. I, pi. iv, fig. 14), and this should be considered the type. The 

 example from Hopton (also figured, t.c, pi. vii, fig. 25) differs so 

 much from the Belaugh specimens that it may even be a new form, 

 but it is undesirable to create a new species on a single imperfectly 

 preserved specimen. Those in the Museum of Practical Geology from 

 the AYey bourn Crag of East Bunton are also of pleistocene age. 



