41 



DESCRIPTIONS OF TWELVE NEW SPECIES, CHIEFLY FROM 



MAURITIUS. 



Ey G. B. SowEEBT, P.L.S., etc. 

 Read November 10th, 1893. 



1. MiJEEX (OcnsTEBEA) CuoucHi, n.sp. PI. IV. Fig. 9. 



Testa subfusiformis, utrinque acuminata, antice breviuscula, postice 

 elongata, imdique asperrima, albida, f usco maculata ; spira conico 

 turrita, acuta; anfractus 8, convexi, embryonales 2 loeves, sequentes 

 varicibus 6, squamosis, breviter et crasse bispinosis, liris spiralibus 

 2, eximie squamosis muniti ; sutura profunda ; anfractus ultimus 

 trig-onus, superne angulatus, inferne attenuatus ; apertura ovalis ; 

 columella tenuis la3Yis ; labrum fimbriatum, postice prof unde sinuatum ; 

 canalis parva, recurva. Long. 14, maj. diam. 8 mm. Mai. — Mauritius 

 (Robillard). 



Yar. rufescens. Testa angustior, rufa, antice nigro-fusco batteata. 



The two specimens (type and variety) of this charming little species 

 are in the collection of Mr. Walter Crouch. Though very diiferent in 

 appearance, I cannot find any good grounds for separating them 

 specifically. The shells are crisply and beautifully scaled all over, 

 and the spiral ridges are raised on the varices into erect tubular 

 spines. 



2. MuKEX (Octnebea) obtusus, n.sp. PI. IV. Fig. 8. 



Testa ovata, solida, obesa, albida; spira elatiuscula, obtusa; an- 

 fractus 6, convexi, costis 4-5, latissimis rotundatis instructi ; spiraliter 

 lirati, inter liras foveolis profundis numerosis sculpti ; anfractus 

 ultimus spiram superans, robustus basin versus attenuatus; apertura 

 ovata; columella leviter contorta ; canalis curta. Long. 25, maj. 

 diam. 15 mm. Hdh. — Mauritius (Eobillard). 



This species is allied to M. tetragonus, but distinguished by its 

 remarkably stout obtuse spire, giving a totally diflterent form to the 

 shell. 



3. Fusus Baeclayi, n.sp. PI. IV. Fig. 13. 



Testa angulato-fusiformis, sinistrorsa, rimata, antice leviter contorta, 

 postice acuminata ; luteo-albida, fulvo fasciata ; spira conico-turrita, 

 acuta ; anfractus 7, planato declives, spiraliter dense squamoso lirati, 

 longitudinal iter sub-oblique costati, inferne angulati ; costis paulo 

 elevatis, latiusculis, ad angulum sub-nodulosis ; sutura anguste sed 

 profunde canaliculata ; anfractus ultimus ad peripheriam valde angu- 

 latus, infra angulum leviter convexus, deinde contractus, in caudam 

 breviusculam, leviter recurvam desinens ; apertura sub-ovata, intus 

 lirata ; columella arcuata ; canalis brevis. Long. 28, maj. diam. 

 14 mm. Hub. — Mauritius (Barclay). 



