183 



A very minute species like P. vertigo Drap., which is a reversed 

 shell. 



Pupa [Vertigo] simplex. T. minima, cylindracea, lams, casta- 

 nea ; apice obtuso ; anfractibus sex, sub-planulatis : apertura orbicu- 

 laris, edentula. Axis, -^ ; diam. ^5 poll. Found in a grove near 

 Fresh Pond, Cambridge. 



Nearly identical with P. edentula Drap. 



D^= Vol. iv. 356, (April, 1843.) 

 Pupa servilis [is P. pellucida Pfr.]. 



II^= Vol. iv. No. 1, Jan. 1842, (cover,) and p. 452, Jan. 1844. 

 Helix penicillata [is a delicately streaked variety of//. Cuben- 

 als Pfeif.]. 



Helicina glabra [is H. nitida Pfeif.]. 



Pupa carinata [is a half-grown specimen of P. rupicola Say.]. 



Pupa (Siphonostoma) lituus [is Cylindrella elegans Pfeif.]. 



Cyclostoma bicolor [is C. (Megalomastoma) auriculatum 

 D'Orb.]. 



Cyclostoma clathratum [is C. rugulosum Pfeif.]. 



Cyclostoma mahogani [is C. pictum Pfeif., C. sagra D'Orb.]. 



Cyclostoma [Cistula] catenatum. T. conico-turrita, fulvo- 

 viridescens; anfr. 5 convexis, striis elevatis volventibus fusco-artic- 

 ulatis cinctis : apertura sub-orbicularis, anfractu penultimo disjuncto ; 

 peristomate vix reflexo, postice dentato ; operculo albo, calcareo. 

 Long. 0.5 ; lat. 0.4 poll. Inhabits Cuba, at Sagua la Grande. 



Very similar in size, form, and surface to C. limbiferum, but the 

 aperture is quite different, having a peculiar notch at the posterior 

 angle of the aperture, and wanting the broad white peristome. 



Conus castrensis. C. testa larvi, conica, antice admodum con- 

 stricts ; spira. planulata, apice mamillata, flammulis radiantibus cas- 

 taneis notata; anfr. 10, supra concavis, ultimo colore albo, lineis et 

 maculis angulatis castaneis reticulata ; basi castanea. Long. 3 ; lat. 

 1.5 poll. 



[This is the C. thalassiarcha Reeve, 1843.] 



05^ Vol. iv. 456, (January, 1844.) 



Streptaxis Petitii. T. oblique ovato-subglobosa, albido-vires- 

 cens, arete umbilicata ; anfractibus 7 convexiusculis, apice obtusa, 

 supra striata, subtus levigata ; apertura subquadrata antice rotundata ; 

 columella dente lamelloso instructa ; peristomate albo, undulato, re- 

 flexo, ad angulum posticum attenuate Axis, 0.4 ; diam. 0.3 poll. 

 Inhabits Province of Tavoy, Burmah. Rev. Dr. Mason. 



