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Show 1883.] DR. O. BOETTGER ON NEW CLAUSILLE. 333 alternating, whilst in G. 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 G. distans, 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. Mon. Claus.-Sect. Albinaria, p. 70, t. 3. fig. 1. Var. MULTICOSTA, mihi. Biffert a typo t .majore ,ventricosiore, spira magis concave producta; anfr. 12-12|, costis spira minus validis duploquepluribus (23-26 in anfr. penultimo), minus spatiosis ornati. Apert. latior, rotun-dato- ovata, perist. magis expanso. Caterum et pracipue costis cervicis simillima. Alt. 18|-20, lat. 4|-4f mm.; alt. apert. 4\, lat. apert. 3f mm. Sab. 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. prseclaram, 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 antepenultimo 9 etc.). Lam. supera minor, fere punctiformis. Alt. ca. 18|, lat. 4 | mm.; alt. apert. 4, lat. apert. 3 mm. Hab. St. Nikolo Island, Gulf of Mirabella, Crete (Spratt). Whilst var. multicosta has a much denser costulation in the median whorls, this variety is nearly as widely costulated as C. praclara, 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 PRACLARA,Pfr. Zeitschr. f. Malakoz. 1853, p. 150. F. M A J O R , m . T. typo major, clarius isabellino-albida, costis in anfr. ultimo 7, in anfr. penultimo 9, in anfr. antepenultimo 8 ornata. Apert. multo major, lam. supera longa. Alt. ca. 21 \, lat. 6 mm.; alt. apert. 5, lat. apert. 4. mm. Hab. 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. praclara, P., the crown of the palaearctic Clausilia, 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 spira C. vesti, mihi, similis, sed sculptura cervicis, forma apertura, apparatu claustrali C. retusse, Oliv., PROC. ZOOL. Soc-1883, No. XXIII. 23 |
