SPECIES OF riSIDIUM. 27 



SUFFOLK, EAST. ES. 



Beccles [Crowfoot] ; Bulchamp [S. P. Woodward] ; Southwold 

 [8. V. Wood]. 



On the Continent this species occurs living throughout Europe 

 as far south as Naples (12, p. 43), and eastwards extends through 

 Siberia north of the Altai to Lake Baikal, whence it has been 

 described under the name of P. laical ense and its variety nova as 

 P. subtilestriatum, Lindholm (95, p. 84). It has further been 

 recorded from Algiers by Morelet (122, p. 298). 



In the fossil state it has been reported from the Holocene of 

 Germany [Sandberger (154, p. 951)] ; the Holocene and Pleistocene 

 of Denmark [Johansen (85, p. 9)] ; the Pleistocene of Gorkum, 

 Holland [Harting (76, p. 117), Lorie (101, p. 163)] *, the Pleisto- 

 cene (Campinien) of Brussels [Mus. Hist. Nat., Brussels] ; the 

 Pleistocene (Mosbacher Sand) of Mosbach vor Biebrich (near 

 Wiesbaden) [Sandberger (154, p. 951), A. Braun (23, p. 144), and 

 Prestwich Coll., B.M. 48212], of Hohensachsen and Pilgerhaus (near 

 Weinheim-an-der-Bergstrasse) [Wiist Coll.], and of Mauer (near 

 Heidelberg) [Geyer (69, p. 96)]. Also in France from the Upper 

 Pliocene of Bligny (near Dijon), the Loess at Menchecourt (Pleisto- 

 'cene) [Prestwich Coll., B.M. L. 14874-76] and the sands at 

 St. Acheul [Prestwich Coll., B.M. L. 14877], and from Charonne, 

 near Paris [Prestwich Coll., B.M.L. 23984]. 



2. Pisidium astartoides, Saudberger. 

 [Pis. I, f. 2 ; III, f. 2 ; V, f. 10 ; X-X1L] 



1840. Cyclas (Pisidium) amnica, var. ? : Lyell, Lond. & Edinb. Phil. 



Mag. Ser. in, xvi, pp. 363 & 364, tigs. ; id., Antiq. Man, 1863, 



p. 217, tigs. p. 218. 

 1851. Pisidium ammcum, var. sulcatum: S. V. Wood. Crag Moll. ii. 



p. 110. 

 1864. Pisidium antiquum, n. sp. : Von Martens, Zeitschr. Deutsch. Geol. 



Gesell. xvi, p. 349. [Non Braun, 1851.] 

 1880. Pisidium astartoides^ Sandberger, Palaeontographica, N. F. vii. 



( = xxvii), p. 96, pi. xii, f. 1-1 e. 



This fossil species seems to have been first detected in the Fresh- 

 water Beds at West Runton, Norfolk, in 1840 by Sir C. Lyell who 

 figured it (102, p. 364) with a query as a variety of P. amnicum, 

 and noted its presence also at Grays. Later on he recognized the same 

 form as occurring at Ilford (103, pp. 217-218). Dr. S. P. Woodward 

 included it in his collection with strongly striate specimens of 

 P. amnicum from Grays under the name P. sulcatum. 



Its specific distinctness was first held by Von Martens (108, 

 p. 349), but unfortunately the name antiquum which he bestowed 



* Not Pliocene as erroneously recorded by Kennard and Woodward (87, 

 p. 202). 



