116 Mr. R. T. Lowe on nevo Species of Cyclostoma, 



4. C. Monizidnnm. 

 T. subpyramidato-conoidea sericeo-nitens tenuiuscula omnino ecari- 

 nata laxiuscule rimato- perforata fusco-coffeacea ; spira elevatius- 

 cula subproducta, anfr. sequicrescentibus subdepre3siusculis tu- 

 midis, striolis vel subtilissimis creberrimis a?quissimis distinctis 

 transversis alias spirales obsoletas valde indistinetas tenuissime reti- 

 culatim decussantibus, ultimo subdepresso haud ventricoso ; sutura 

 valde impressa profunda ; apert. spira distincte breviore. 

 Long. 5-5|, diam. 4|-5 mill. ; apert. 2\, spira 3-3^ longa ; anfr. 5. 

 Jrlab. in Promontorio "Garajao" vel "Brazen Head" dicto Ma- 

 dera? in scaturigine v. rupe madida. 



The volutions are even more tumid, and the suture more 

 deeply impressed, than in any form of C. lucidum, from which it 

 differs also in its smaller size, elongate pyramidal shape, open 

 rimal perforation, and regularly increasing, vertically slightly 

 flattened or depressed, reticulately striolate volutions. Colour 

 uniform plain dark coffee-brown. Opercle unknown. 



Named in honour of my able and observant botanical friend 

 S r . J. M. Moniz, who found it last year on the Brazen Head, 

 near Funcbal, and who, supposing it to be distinct from the 

 common C. lucidum, has most liberally furnished me with two 

 out of his four or five specimens. On referring to my own col- 

 lections, I find, however, four examples of precisely the same 

 shell, collected by myself on the same spot in January 1851, 

 and kept apart for ulterior examination. Thus a sufficiency of 

 specimens exists to warrant some reliance on the constancy of 

 the above-recorded characters. 



I desire to commend, however, all the four preceding species 

 to the close study and attention of observers on the spot, who 

 alone will be able to decide by examination of the animals, and 

 more numerous examples of the shells from the same or different 

 localities, whether the above differences are merely sexual and 

 varietal, or really good and valid. For myself, I must confess 

 to having either overlooked or disregarded them as unim- 

 portant until very recently. 



5. C. annulatum. 



T. breviter subpyramidato-conoidea sericeo-nitens tenuiuscula largius- 

 cule rimato-umbilicata omnino ecarinata fusco-coffeacea ; spira 

 elevatiuscula subproducta, anfr. sequicrescentibus valde tumidis 

 depressis, intermediis costis sequidistantibus transversis concin- 

 niter annulatis ceterum omnino lsevigatis vel aliquando tenuissime 

 et obsoletissime spiraliter substriolatis, ultimo depresso haud ven- 

 tricoso peristoma versus exannulato costis vel rarioribus v. evanes- 

 centibus v. nullis ; sutura valde profunda inciso-impressa ; apert. 

 spira vix breviore. 



Long. 4-1-}, diam. 4-4^ mill. ; apert. 2-2\, spira 2-J- longa ; anfr. 4^. 

 Hab. in declivibus rupibusve humidis sylvarum Insularum Cana- 



