334 DR. O. BOETTGER ON NEW CLAUSILI^. [^^7 1> 



propior. — T. vix rimata, subclavato-fusifoj'mis, opaca, calcareo- 

 alba, in interstitiis costularum hie illic cinerea, apice nigra. 

 Anfr. ca. 12 vix convexiiisculi, sutura Icevi crenata disjuneti, 

 dense valideque undulato-costidati, costulis scBpe sursum bifidis, 

 interstitiis verticaliter substriatis ; ultimus parum attenuatus, vix 

 validius et ceque ac cceteri costidatus, costulis ad suturamplerum- 

 que bifidis, busi distincte anguste sulcatus, obsolete bicristatus, 

 crista inferiore distinctiore sti-iis densis ornafa. Apert. ampla, 

 late oblonga, basi valde recedens, iiitus fusco-castanea, perist. 

 atbo. Apparatus claustralis lamellceque valde aff. C. tereti, 

 Oliv., lunella obsoleta, apice clausilii corrotundato. Alt. ca. 

 21, lat. 4 J mm. ; alt. apert. 4|, lat. apert. 3| mm. 

 Hab. Zakro?, east of Crete (Spratt). 



One of the most difficult forms of the island of Crete. It looks 

 nearly like certain forms of C. corrugata, Drap., var. infiata, Oliv., 

 fromCaudia ; but the shape of the neck, the receding base of the 

 mouth, and the deep brown colour of its interior shows that we must 

 search for its allies amongst C. teres, Oliv., and C. retusa, Oliv. 

 The form of the neck and also the mouth and the apparatus claus- 

 tralis being very analogous to those of C. retusa, I think it best 

 to place it between this species aud C, vesti of the olivieri-teres 

 group. 



25. Clausilia vesti, n. sp. (Plate XXXIV. fig. 11.) 



Quasi intermedia inter C. corrugatum, Drap., f. epimenides, 

 Blanc, et C. teretem, Oliv., sed huic magis affinis. — Differt a 

 C. tereti, Oliv., t. tola valide costulata. Anfr. \a jdanissimi, 

 sutura suhnarginata disjuneti, exceptis apiculihus costulati, 

 costulis validis, rectis, striclis (30 in anfr. penullimo'), inter- 

 stitiis spiraliter substriatis ; ultimus distantias validiusque costu- 

 latus, costulis pp. 20, ante aperturam altioribus, undulatis, sursum 

 hie illic dichotomis, basi parum distincte breviter subbicristatus, 

 crista wnbilicaU plieulis sat validis crenata. Apert. C. teretis, 

 Oliv., sed lam. supera longa nee punctiformis, infera minus 

 distincte bifurcata. Caterum huic speciei simillima. Alt. 27g, 

 lat. 4| mm. ; alt. apert. oh, lat. apert. 3| mm. 

 Hab. Sitia Bay, N.E. of Cret'e (Spratt). 



This fine form, which 1 name in honour of Herr von Vest of 

 Hermannstadt, Transylvania, author of an important and very 

 interesting paper on the classification of this genus, is perhaps only a 

 variety of C. teres, Oliv. ; but because intermediate stages of sculp- 

 ture are wanting between these two shells, and differences also 

 exist in the form of the neck aud of the lamellae, I have thought 

 it better to create a new sjiecies for it. O. corrugata, Drap., 

 var. inflata, Oliv., in its beautiful large local form epimenides, 

 Blanc, which inhabits the Spinaluuga peninsula, is, on the other hand, 

 a nearly allied shell ; but its ventricose ibrm, the different costulation of 

 the neck, the largeness and different position of the inferior lamella, 

 and the absence of the small superior palatal plait will easily distinguish 

 the two species. 



