214 SOLARIUM. 



nonnullis similibus, minus autem vicinis, sulcisque clathratis in- 

 structa, ita ut cingula circiter 13-14 ultimum anfractum oniant. 

 Basis plana? vel retusae cingula 4 intima (seu ultima) multo re- 

 motius elathrata, sulcis latioribus sejuncta ; crenre permulta? c. 

 ultimi (omnium latissimi) ultra parietem humilem umbilici modici 

 conspicue eminent.* 



Of the following species, ascribed rightly or wrongly to this 

 genus, I am unable to procure examples. 



tricinctum, Phil, in Kuster, ed. C/iemn. Solar, p. 36. — " T. mi- 

 nima, albida, fusco radiata ; anfractibus teretibus, sutura profunda 

 divisis, transversim corrugatis ; cingulis 2 in anfractibus superiori- 

 bus, 3 iu anfractu ultimo, supremo striis elevatis a sutura radian- 

 tibus secto ; umbilico aperto, pervio, marginato, striis elevatis ra- 

 diantibus, sulcisque concentricis granulato-decussato. Gabon, in 

 Guinea. 1^ lin." The unfigured specimen was in the collection 

 which M. Llargilliert bequeathed to the city of Kouen. From 

 its minuteness and the peculiarity of its umbilicus its generic lo- 

 cation may be doubted. 



implexum, Mighels, Proc. Bod. N. H. ii. p. 22 {copied by 

 Phil, in Kits/, ed. Chemn. Solar. p. 37). — " Depressed, subdiscoid, 

 greyish-white, with a few brown spots ; whorls 3, flattened, with 

 5 rounded revolving ridges on each, intersected by numerous, 

 impressed, transverse striae; aperture circular; umbilicus large 

 and deep. T 4 T inch. Oahu." The description (in English only) 

 is too brief for the determination of a species : it would tolerably 

 suit a young dorsuosum. 



delphinoloides, I) 'Orb. Moll. Cuba, p. 67 (copied in Phil. 

 Kuster, Solar, p. 2,b),pl. 19, /. 21-24.— "T. trochoidea, trans- 

 versim costata, alba ; spira elevata, conica ; anfractibus convexis, 

 supra 4 costatis, subtils 8 (costatis) ; umbilico lato, non canali- 

 cular, costato, interne subcrenulato ; apertura rotundata. 4 



* In the Zoology to Humboldt and Bonpland's Voyage (ii. p. 269), I find a spe- 

 cies described (said to be almost the living analogue of the fossil mdUeffranuvt) which 

 probably belongs to this section. 



S. granosum, Valenc. " T. conoidea, subdeprcssa, infra rotundata, gibbosa, pcni- 

 tus ubiquc grauosa, rnfo variegata : umbilico coarctato, dentato. Acapulco. ( J-4 

 lin." The shape is said to be less couic than in granidatuM, and the whorls, each 

 having 5 or 6 granulated belts, the keel aloue being smooth, to be more convex ; 

 the colouring to be reddish with conspicuous chestnut spots along the course of the 

 spire, and red spots, paler than the others, near the white keel ; the base, which is 

 granulated throughout, to be encircled by 5 rows of slightly rounded tubercles : the 

 umbilical teeth to be strong and white. 



