1883.J DR. O. BOETTGER ON NEW CLAUSILl^. 333 



alternating, whilst in O. clara, of which the habitus is shorter and 

 more ventricose, the intervals between the ribs enlarge steadily from 

 apex to aperture. The same character as in the new species is to be 

 seen in C. disians, P., from Soudsouro Bay ; but here the costulation 

 is finer (17 ribs on each whorl), and the inferior lamella is 

 distinctly bifurcate. 



22. Clausilia CLARA, Bttg. Mou. Claus.-Sect. Albinaria, p. 70, 

 t. 3. fig. 1. 



Var. MULTicosTA, mihi. 



B'lffert a typo t.majore.ventricosiore, spira magis concave producta; 

 anfr. 12-12^, costis spirce mimis validis duploque pluribus (23-26 

 in anfr, jjenultimo), minus spatiosis ornati. Apert. latior, rotun- 

 dato-ovata, perist. magis expanso. Gceterum et prcecipue costis 

 cervicis simillima. Alt. 18g-2*0, lat. 4|-4| mm. ; alt. apert. 

 4|, lat. apert. 3| mm. 



Bab. Mirabello, N.E. of Crete (Spratt). 



A larger variety, with one whorl more, well characterized by the 

 more finely costulated upper whorls. 



Var. PAUcicosTA, mihi. 



Colore sculpturaque fere intermedia inter C. prteclaram, P., et 

 C. claram, Bttg,, sed huic multo magis affinis. Biffert a typo 

 t.fere subfusco-grisea, costis anfr. omnium minus numerosis {in 

 anfr. ultimo 7, in penultimo 10, in antepemdtimo 9 etc.). Lam. 

 supera minor, fere punctiformis. Alt.ca, \S^,lat. A\mm. ; alt. 

 apert. 4, lat. apert. 3 mm. 

 Hab. St. Nikolo Island, Gulf of Mirabella, Crete {Spratt), 

 Whilst var. midticosta has a much denser costulation in the median 

 whorls, this variety is nearly as widely costulated as C prceclara, P. 

 But the latter species shows 6 ribs in the last whorl, ours 7,' and 6 

 and 6, ours 10 and 9, ribs in the penultimate and antepenultimate 

 whorls. 



23. Clausilia PR^CLARA,Pfr. Zeitschr. f. Malakoz. 1853, p. 150, 



F. MAJOR, m. T. typo major, clarius isabellino-albida, costis in 

 anfr. idtimo 7, in anfr. j)enultimo 9, in anfr. antepemdtimo 8 

 ornata. Apert. multo major, lam. supera longa. Alt. ca. 21|, 

 lat. 6 mm. ; alt. apert. 5, lat. apert. 4 mm. 

 nab. The south-east of Crete {Spratt). 



The type, of smaller size and aperture and showing fewer ribs 

 on the whorls, lives near the shores of the G ulf of Mirabella. C. prae- 

 clara. P., the crown of thepalaearctic Clausilice, is easily distinguished 

 from C. clara, Bttg., by its fewer and constantly curved and 

 convex ribs. 



24. Clausilia vermiculata, n. sp. (Plate XXXIII. fig. 10.) 



Habitu sculpturaque spirce C. vesti, mihi, similis, sed sculptura 

 cervicis, forma aperlurw, apparatu claustrall C. retusse, Oliv,, 

 Proc. Zool. Soc— 1883, No. XXIII. 23 



