SPECIES OF PISIDTC3I. 119 



RECENT. 

 CORK, WEST. WC. 



L. Namaddra and small unnamed tarn close thereto [A. W, S.]. 

 GAL WAY, WEST. WGr. 



Inishbofin (L. Gowlanagower) [A. W. S.]. 

 GAL WAY, SOUTH. SG. 



Tallanafrankagh, L. [R. A. P.]. 

 KEKRY, SOUTH. SK. 



L. Nagarriva [D. M.] [K. H. J.] [A. W. S.] [R. A. P.]. 



Quite recently Dr. Nils Hj. Odher, of the Riksmuseum at 

 Stockholm, very kindly forwarded specimens from the Takern See, 

 Ostergotlund, Sweden, among which this species occurred in 

 abundance. They were found in Chara at a depth of about 1 m. 

 with P. subli'uncatum, P. casertanum, P. nitidum, P. milium and 

 P. lilljeborgii. The species is, therefore, a northern one and should 

 now be sought for in tarns in the Western Highlands of Scotland. 



16. Pisidium obtusale (Lam.?) Jenyns. 

 [Pis. II, f. 10; IV, f. 4; XXX.] 



1818. ?Cyclas obtumlis: Lamarck, Hist. Anim. sans Vert, v, p. 659 



(id., 2nd ed., vi, 1835, p. 269). 

 1821. Pisidium obtusale, Lam.?: Pfeiffer, Naturg. Deutsch. Moll, i, 



p. 125, pi. v, f. 21,22. 

 1832. Pisidium obtusale, Pie iff. : Jenyns, Trails. Cainb. Phil. Soc. iv, 



p. 301, pi. xx, f. 1-3. 

 1837. Pisidium fontif tale, var. obtusale, niihi : Held, Isis, 1837, col. 



306. 

 1843. Cycla* foittinalis, var. B. obtuwlis: Dupuy, Essai Moll. Gers, p. 89. 



- Cyclts obtmalis, Lam. ; Hanley, Cat. Kec. Bivalve Shells, p. 90. 

 1852. Pera gihba : Leach, Moll. Brit. Synop. p. 292. 



1854. Pisum obtusale, Lamk. : Deshuyes, Cat. Conch. Brit. Mus. ii, 



p. 279. 



1855. Pisidium ylobulosum, nob. : Gassies, Actes Soc. Linn. Bordeaux, 



xx, p. 348, pi. ii, f. 8. 



1857. Pisidium casertanum, var. G. qlobulosum, Ga?s. : Baudon, Me"m. 



Soc. Acad. Oise, iii, p. 343 & 348. 



1858. Musculium obtusale, Pfeiff. : Adams, Gen. Rec. Moll, ii, p. 42. 



1859. Pisidium 2^sillum, var. obtusalis: Jeffreys, Ann. & Mag. Nat. Hist. 



ill, iii, p. 37. 



1862. Pisidium nitidum, Jenyns (pars] : Jeffreys, Brit. Conch, i, p. 25. 

 1873. Pisidium scholtzii, n. sp. : Clessin, Malakozool. Blatt. xx, p. 23, 



pi. i, f. 1. 



1902. ? Pisidium raddei, n. sp. : Dybowski, Nachrichtsbl. Deutsch. 



Malakoz. Gesell. xxxiv, p. 95; Rossiua.ssler, Icon., N. F. x, 

 f. 1810. 



1903. Corveoci/clas (Cyclocaly.v) scholtzii, Cless. : Dall, Proc. Biol. Soc. 



Washington, xvi, p. 7. 



The recognition of this very distinct form must be attributed to 

 Jenyns, for though he like Pfeiffer adopted Lamarck's name, there 

 is no evidence as to the true nature of the forms those two older 



