C^CILIOIDES OF CENTRAL EUROPE. 11 



rnella twisted, strongly truncate, not reaching the base; right 

 margin arching forward; margins joined by a callus. Length 

 6, diam. 1.25 mm. (Byt. ). 



Southern France: Nice, type loc. (Risso); Italy: Arno river; 

 Pisa (Issel); Po river at Turin (Pollonera). 



Acicula eburnea Risso, Hist. Nat, Eur. Merid., 1826, iv, p. 

 81. Csecilianella c., BGT., Etude synon. sur les Mollusques des 

 Alpes Maritimes publies par A. Risso, p. 43, pi. 1, f. 20-22 

 (1861), description and figures of the type specimen. LOCARD, 

 Catal. Gen. des Moll. viv. de France, 1882, p. 136. 



Var. enhalia Bgt. PI. 1, fig. 10. Very minute, composed of 

 5 flattened, irregularly increasing whorls, the last over one- 

 third the total length. Right margin of the lip not arching 

 forward; margins of aperture joined by a thin callus which has 

 a more or less obsolete tubercular prominence at the insertion of 

 the outer lip. Length 3.5, diam. 1 mm. Brittany: Around 

 Cancale (Cotes-du-nord), along the cliffs almost at the high tide 

 line. (Bgt., Malac. terr. et fluv. de la Bretagne, 1860, p. 158, 

 pi. 2, f. 14-16.) 



Var. anglica Bgt. According to Bourguignat, this is dis- 

 tinguished from acicula by the larger size, length 8, diam. 1.5 

 mm. the whorls of the spire more convex, the suture deeper, 

 not margined, the aperture rounded, and the columella strongly 

 truncate. England. (C. anglica BGT., Rev. et Mag. de Zool. 

 1856, p. 384, pi. 12, f. 4, 5.) 



This "species" is a good example of Bourguignat at his 

 worst. There really was no type specimen of anglica; nothing 

 but Reeve's figure in the Conchologia Iconicav, pi. 20, f. Ill, 

 which Bourguignat described in formal phrase, while his artist 

 redrew it enlarged for his plate. The citation of Reeve is curi- 

 ously falsified in name of the work, number of the figure and 

 date, almost concealing the real source of all of the information 

 extant upon " C. anglica.'" Whether the English form has any 

 racial characters or not must be left for English students to 

 decide. I have never seen English examples so large as anglica 

 is claimed to be; but the size was probably not carefully meas- 

 ured from the shell, but merely estimated by the eye. Reeve's 

 Iconica is very unreliable in all relating to minute shells, though 

 the figures of large species are admirable. 



