KEISTNAED & WOODWARD : BRITISH PLIOCENE NOjST -MARINE MOLLUSCA. 195 

 16. SUCCINEA ELEGANS, EissO. 



Siiccinea ollonga, Drap. : S. Y. Wood, Crag. Moll., vol. i, p. 6, pi. i, 

 fig. 6. 



Form, and Loo. — Norwich Crag: Coltishall (IN'orwich Mus.); 

 Eulcliamj) (Brit. Mus.). 



This form, though so ahiindant in the pleistocene beds of this country, 

 is very rare in the pliocene. It is another of those species for 

 a knowledge of existence of which on the continent in pliocene times 

 we are indebted to Dr. Lorie, who has noted it as occurring in the 

 borings at Grorkum, Utrecht, Diermerbrug, and Amsterdam. Elsewhere 

 its earliest recorded appearance is in the lower pleistocene of Mosbach. 



17. SUCCINEA PUTEIS (Liuu.). 



Succinea putris, Linn: S. V. Wood, Crag Moll., vol. i, p. 5, pi. i, 

 fig. 5. 



Form, and Loo. — Eed Crag : Butley (Ipswich Mus.). Norwich 

 Crag : Bramerton Common and Blake's Bit, Bramerton (Norwich Mus.). 



This is a rare form in the Crag, and is unrecorded from any 

 continental pliocene beds, making its first appearance there in the 

 lower pleistocene of Mosbach, while in the middle and upper pleistocene 

 it has been found in many localities. 



18. Succinea oblonga, Drap. 



Form, and Loo. — Norwich Crag : SouthAvold ; Bulchamp. 



We have only seen one example of this species, and that an 

 imperfect one, in the 8. Y. Wood Collection at the British Museum 

 (Natural History). It differs somewhat from the typical form of 

 8. ollonga, but we do not think sufficiently so to warrant its separation. 

 Although extremely rare in this country at the present day, it was in 

 pleistocene times a widely distributed and common form, both here 

 and on the continent. 



19. LiMN^A auricularia (Linn.). 

 Limnma auricularia, Linn. : S. Y. Wood, Crag Moll., Suppt. II, p. 36, 

 pi. iv, fig. 3. 



Form, and Loc. — Norwich Crag : Bramerton Common (Norwich 

 Museum). 



The only known example of this species is an immature specimen, 

 and may be referred to the " var. acuta, Jefi'." This is apparently 

 a rare form on the continent in a fossil state, since it is only recorded 

 from the middle pleistocene near Potsdam. 



20. LlMN^A PEREGER (Miill.). 



Form, and Loc. — Eed Crag : Butley (A. Bell). Norwich Crag : 

 Bramerton Common ; Southwold ; Bulchamp. 



It is quite hopeless to attempt to unravel the synonymy of the 

 pliocene forms of Limncea pereger, L. palustris, or L. truncatula, since 



