MANUAL OF CONCHOLOGY. 



Family FERUSSACID^E Bgt. (Continued). 



Genus OECILIOIDES Herrmannsen. 



Acicula Risso, Hist. Nat. Eur. M6rid. iv, p. 81, for A. eburnea 

 Risso. Not Acicula Hartmann, 1821. Ce'cilioide, BLAINVILLE, 

 Diet. Sci. Nat. vii, 1817, p. 332, and "ceclionides de M. de 

 Ferussac," /. c. v, Suppl., p. 129, under Bulimus acicula. 1817 

 (no Latin name given). Caecilioide^ F6r. HERRMANNSEN, Indicis 

 Generem Malac., i, p. 150, 1846, as equivalent to Acicula Risso. 

 E. A. SMITH, Journ. of Conch, vi, April, 1891, p. 342. 

 Cecilioides F6r. pater., BECK, Verzeichniss einer Sammlung 

 von Landconchylien aus den Danischen Staaten in Europa, in 

 Amtlicher Bericht ueber die 24ste. Versammlung Deutscher 

 Naturforscher und Aerzte in Kiel, 1847, p. 122, for C. acicula 

 Mull. Csecilianella BOURGUIGNAT, Revue et Mag. de Zoologie, 

 viii, 1856, p. 378, type C. acicula Mull. P. FAGOT, Historique 

 du genre Csecilianella, in Bull, de la Soc. Malac. de France, iv, 

 1887, p, 49. BERTHIER, a quel auteur attribuer la paternite du 

 genre Csecilianella? t. c. p. 59. Aciculina WESTERLUND, Fauna 

 der in der Palaiirktischen Region Lebenden Binnenconchylien, 

 iii, 1887, p. 175, first species C. acicula. ? Belonis HARTMANN, 

 Erd- und Siisswasser Gastropoden der Schweitz. 1841, p. 48 

 (for ' ' Belonis acicula^ " mentioned without synonymy, descrip- 

 tior, or other means of identification.) 



The shell is imperforate, very small and slender, very 

 narrowly lanceolate, with obtuse, rounded, smooth apex; 

 smooth, fragile, transparent (weathering to opaque white); 

 aperture usually less than half the total length, piriform; outer 

 lip arching forward in the middle, acute; columella concave, 

 more or less distinctly truncate at base, usually somewhat 



