SPECIES OF Pismire. 13 



III. LIST OF INDETERMINATE PAL^ARCTIC FORMS. 



The following named species have not been dealt with in this 

 paper or relegated to synonymy, either because of the inadequate 

 descriptions given of them and the absence of the actual or 

 authenticated specimens on which to form an opinion concerning 

 them, or for other specified reasons : 



Pisidium ncutum, m. : L. Pfeiffer, Arch. f. Naturg. vii, 1841, Bd. i, 

 p. 230. 



Forbes and Hanley (63, vol. ii, p. 131 ) refer this to P. henslmr- 

 cnntm, and other writers have copied from them, but it is hard 

 to see the reason, especially when the author notes that it 

 seems more nearly allied to P. obliqutim [ = amuicum] than to 

 P. fontinale. 



Pi*!i1ium asperi, Cless. : Clessin in Suter, Malakoz. Blatt., N. F. xi, 

 1889, p. 26. Zugersee, 200 m. Not afterwards referred to. 



: P. mil htm, var. asperi, Cless. : Clessin in Suter, Malakoz. 

 Blatt., N. F. xi, 1889, p. 25 ; Clessin, Moll.-Fauna Oesterreich- 

 Ungarns, 1890, p. 786, fig. Klousee, 27 m. 



Whether the author considered this and the preceding species 

 to be identical or not does not appear. 



Pisidium barbozanum, Castro in coll.: Locard, Arch. Mus. Hist. 

 Nat. Lyon, vii, no. 1, p. 210. 



This may be a dwarfed P. casertanum, or P. nitidum. 



Pisidium canariense, Shuttl. : Shuttleworth, Mitthl. Naturf. Gesell. 

 Bern, 1852, p. 146. 



Pisidium charpentieri, m. ; Clessin, Moll.-Fauna Oesterrei( h- 

 Ungarns, 1890, p. 787, fig. 



Pisidium colbeaui, Clessin : Clessin in Kiister, Syst. Conch. -Cab. ix, 

 Abth. 3, Cycladeen, p. 48, 1874, pi. v, f. 21-23. 



Pisidium conventus, n. sp. ; Clessin, Malakoz. Blatt. 1877, p. 181. 

 May be P. nitidum. 



Pisidium creplini, Dkr. : Deshayes, Cat. Conch. Brit. Mus. ii, p. 280. 

 Is a Sphcerium. 



Pisidium dabneyi, nov. sp. : Guerne, Le Nat. ix, 1887, Ser. n, p. 195. 

 Is probably a Sgh<Bi*ium. 



Pisidium ddinyoli, Bivona: Villa, Disp. Syst. Conch. 1841, p. 44. 

 Is a SpJurrium. 



Pisidium demissum, m. : Clessin, Correspond.-Bl. zool.-niin. Yer. 

 Regensburg, xxviii, 1874, p. 182. 



Pisidium dwbrueili, nob. : Baudon, Rev. Sci. Nat. i, 1872, p. TO. 

 pi. iii, f. 1-4. 



Pis't/fitm diiplicatum, m. : L. Pfeiffer, Arch. f. Naturg. vii, 1841, 

 Bd. i, p. 230. 



Morch (119, p. 336) and Kreglinger (91, p. 362) mnl<e 

 this a synonym for P. nitidum. It was overlooked by Forbes 

 and Hnnley, although its description follows that of P. acutum. 

 Pfeiffer says that the species seems to be related to the Cyclas 

 apptndiculata, Turt, with which he was unacquainted. 



Cyclas fontinalis : Draparnaud, Tabl. Moll. France, 1801, p. 105. 

 Probably in part P. casertanum (see pp. 6 & 33). 



