SOLAKIUM. 239 



sutura hand canaliculata. Anfractus planulati, brunnci fulvi vel 

 lividi, cingulis 5 confertim et satis rude crenogranosis ornati ; 

 cing. 4 prima sequalia, contigua, quintum latius articulatum. 

 Peripberia obtuse bicarinataj cingulum infra sulcum medium 

 ingustissimum (aliquando autem filosum) minus quam alteram 

 emiuens. Basis cingulis crenogranosis 6 instructa; ultimum 

 latum, baud semper album, uiubilicum magis minusve angustum 

 margine ejus dentato amplectans. Porca umbilicalis inter sulcos 

 prot'uudos 2, in apertura costas simulantes, unica, valida, angusta. 



29. cyclostoma (f. 65, 66, 67), MenJce. — T. conica, nigro- 

 fumosa, ad peripheriam albo articulata. Anfractus spirse superne 

 declives, in cingula 4, quorum inferiora 2, caeteris majora, albo 

 (nonnunquam, autem, ultimum solum) sunt articulata, sulcis 

 latius divisi : cingula et intervalla sulcis radiantibus confertis validis 

 crenolirata. Cingula corporis 10, distincta. Basis pallidior, ro- 

 tundata ; sulcorum ejus sculptura magis obscura. Umbilici pal- 

 lide coarctati creuse validae ; porcre ejusspirales 2-3. — Var. cylin- 

 dracea (Philippi, baud Chemn.). Castanea, vel hepatica, vix 

 conspicue articulata, inter cingula passim fili spirales : quartuin 

 cingulum anf. ultimi a proximis late segregatum. — Var. latior. 

 Intervalla costarum unifilosa ; sulcus peripheriaj latus ; basis magis 

 explanata; umbilicus magis coarctatus. 



Obs. In the more characteristic examples, the bands upon the 

 base are pale, and the sulci chestnut; the intervals between the belts, 

 too, are not threaded : other specimens, however, show a very 

 narrow thread beneath the fourth, fifth (which with the ninth, are 

 the broadest), and the sixth belt. 



Menke has so imperfectly described both this and JEt/iiqps, 

 that it would have been impossible to have determined his species, 

 had it not been for their republication by his friend Philippi. 



The 6'. nubilum of Menke (MSS.), founded on a single worn 

 specimen, was not improbably a variety of this polymorphous 

 species. It is said to differ in being much smaller, having an ad- 

 ditional umbilical ridge, and in the sulci being narrower, pricked, 

 and more shallow. Philippi thus describes it (Zeitschrift Malak. 

 1S4S, p. 170):— 



"T. globoso-conica, albida, in mediis anfractibus fusco macu- 

 lata seu tessellata; anfractibus couvexiusculis, sulcis 3 seu 4 im- 

 presso-punctatis exaratis, ultimo anfractu terete sulcis 10 exarato; 

 umbilico angusto, margine obsolete crenulato, intus cingulis spi- 

 ralibus 4 munito." 3-3j lin. Cape Haiti. 



The shell is figured in Philippics monograph (Kuster, Sol. 

 pi. 4, f. 2). 



VOL. III. 2 G 



