101 



24. Trochus guttatus Koch in lit, 



Tr. testa parva, depressa, sublenticiilari, anguste um- 

 bilicata, nitidissima, licet linois Impressis transversis ali» 

 qiiot exarata, atia, giitiis oonCertis albis picta et subles- 

 sellata; anfraclii ultimo obtiise angiilato; apertura ihombea; 

 columella obh'qua, luberculo terminata. A\\. 2'"; diam. 



2V,'". 



Patria . . . . E colleclione cl. Koch. 



25. Trochus pictus Ph. 



Tp. losta parva, elevato-conica, anguste umbilicata, 

 alba, lineis transversis rufis distaniibiis, maculisque sub- 

 quadratis nigris per fascias longitiidinalos disposilis picta; 

 anlrr. paium convexis, lineis clevatis transversis scniptis, 

 ultinoo angulato; apertura quadrato-rotunda; columella 

 obliqua, simplice. Alt. 2'"; diam. 2'/s'"« 



Specimen in col!ectione mea servo, patriam ignoro. 



26. Trochus Pfeifferi Ph. 



Tr. testa conica, umbilica, castanea ; anfrr. planius- 

 culis, plicis obliquis longiludinalibus, subobsoictis ornatis, 

 ultimo acutavgulo ; basi plana, pallidiore, versus periphe- 

 riam concava, versus ccntrum convexa; linea elevata um- 

 bilicum cingenle; aperiura rliombea , margine columellari 

 drn'iculo, et infra denticulum foveola tcrminato, superne 

 vcro in semiannulum, umbilicum cingenlem producto. Alt. 

 tO'"; diam. 14'". Color omnino Tr. rustici, sed forma 

 valde diversa. 



In colleclione cl. Pfeiffer adest; ubi habitct, non 

 constat. 



27. Trochus indecorus Ph. 



Tr. tpsta depresso-conoidea, imperlbrata, laevi, griseo- 

 fusca, zonis transversis, nigro-arlirulatis, obso!etis; anfrr. 

 parum convexis, ultimo subangulato; basi niedio concava, 

 callo albo umbilici locum occupante; apertura perobliqua, 



