181 
§ 21. Rimvuta. 
Conulus, (Fitz.) sp. Alb. 72, 73. Hylostoma, sp. Alb. 95. 
(Typ. H. cobresiana, Alt.) 
T. obtecte v. rimato-perf. v. imperf. depresso-globulosa subconoidea 
carinata v. subcarinata multi- v. arcti-spira plerumque tenuis 
sepe pubescens cornea obscure fasciata v. lentiginoso-maculata. 
Anfr. 5-7 lente crescentes, ult. distincte angulato-carinato 
subtus subturgido-convexo ampliato, antice subito deflexo sub- 
coarctato constricto. Perf. minima omnino fere clausa, Apert. 
lunata obliqua coarctata, labris remotis, callo plicave ventrali 
sepe interposito. Perist. interruptum albo-incrassatum sub- 
reflecum, basi strictiusculum intusque sepe sinuato-sub-bipli- 
cato-callosum. 
53. H. arctineLua. T'. imperf. parvula convexo-depressa vix 
subglobulosa distincte carinata solidiuscula subcostulato-striata 
obsolete subscobinata; spira subconvexa, aliquando elevatius- 
cula subconoidea, sutura distincta impressa ; anfr. 43-5 con- 
vewiusculis, ult. antice deflexo ad apert. constricto-scrobiculato ; 
perf. minima subnulla lamina peristomatis expansa subproducta 
appresa fere v. omnino clausa ; apert. valde depressa transversa 
oblique lunata edentula, callo ventrali costeformi distincto 
labro parallelo adscendente nec intrante, labris remotis sub- 
parallelis aliquando callo junctis nunquam circinatis ; perist. 
interrupto late presertim basi reflexo, intus basi vix subsinuato- 
cealloso edentulo. 
a. major, callo basali vix ullo. 
Diam. maj. 43-5, min. 4-44, alt. 23-35 mill. Anfr. 43-5. 
Hi. fausta 3, mimor, Prim. (ed. 1851) App. p. xiv. 
f. minima, callo basali subdistinctiore. 
Diam. maj. 4-44, min. 33-33, alt. 23-3 mill. Anfr. 43-5. 
HI. fausta y, minima, Prim. 1. e. 
Hab. a. et B. fossilis ad Canical Madere. 
Obs. Magnitudine H. arcte proxima. Differt testa utrinque con- 
vexiore subglobulosa spira plerumque elevatiore, perf. lamina ap- 
pressa (fere ut in H. arridente) producta fere v. omnino clausa, 
apert. depresso-lunata seepe subquadrata (nec circulari), perist. in- 
terrupto labris semper remotis subparallelis (nec circinatis) basi seepe 
strictiusculo (nee semper arcuato), calio ventrali costeeformi adscen- 
dente v. subverticali (nec lunato-.ntrante v. nullo). 
54. H. capsevua. T. subrimato-perf. v. imperf. distincte et acute 
carinata orbiculata convexo-depressa vix subconoideo-globulosa 
arctispira arcte tenuiter substriolata striolisque spiralibus vel 
subtilissimis alias decussantibus obsoletis, tenuis hispida fusco- 
rufescens supra fere immaculata subtus albo-lentiginosa et fusco 
obscure unifasciata; spira conoideo-depressa; sutura distincta 
impressa ; anfr. 5 planiusculis, ult. abrupte deflexo ad aperturam 
