49 



7. Siphonium lituella Mörch. 



Stoa aramonitiformis M. de Serres Ann. d. scienc. p. 242. 

 Spiroglyphus sp. Carpenter Report p. 324 (verisimiliter). 

 Siphonium lituella Mörch. Proc. 1861 p. 154. 

 T. varie-torta, plerumque lituiformis, profundissime immersa; anfr. graciles, plani, utrin- 

 true obtuse augulati, saepe fossula longitudinali mediana, unde carina vel lira obtusa lateris 

 externi, Striae et lirae incrementi arcuatae, approximatae reguläres; apertura circularis, 

 interdum obliqua, nonnunquam soluta; color albescens vel cinereus, interdum fascia obsoleta 

 fusca; anfr. primi badii. — T. infantilis nitida, apice bullata. 

 Diam. apt. 2 mm. 



Operculum membranaceum, pallide fiavum, superne leviter concavum, area centrali 

 vivide coccinea, lirula circulari mediana, circumdata, inferne convexiusculum, area muscularis 

 flava, opaca, mamilla centrali conica prominente, limbus pallide flavus nitidus. 

 Diam. 1,1 — 2 mm. 



Patria: California. 



8. Siphonium megamastum Mörch. 



Siphonium megamastum Mörch. Proc. 1861 p. 153 t. 25 fig. 12—13. 



T. teres, repens, varie torta, lactea in fundo ferruginea, liris longitudinalibus sub- 

 remotis; lira mediana saepe valida, Striae et rugae incrementi arcuatae, intersectionibus 

 squamiferis; interstitia lirarum obsolete foveolata; apertura circularis, obliqua. 



Diam. 4—5 mm. 



T. juventate laeviuscula, liris obsoletis, nitida, tenuis, castanea, plerumque planorbiformis. 



Operculum: tenuisculum, fiavum, superne subconcavum laminis 2—3 concentricis, sub- 

 erectis, punctis asperis munitum; area centrali aurantia, centro impresso, plerumque flavo; 

 inferne planiusculum, limbo nitido, pallido, convexo; impressio muscularis opaca, cerea, con- 

 centrice rugulosa, striata, lirula circulari termiuata; mammilla centrali validissima, obtuse 

 conica. 



Diam. 3,5 mm. 



var. 1. centriquadra Mörch. Proc. 1862 p. 153. 



Aletes centriquadrus v. imbricatus Carp. Cat. p. 302. 

 T. brunnea, fundo albescens, planorbiformis, semi-immersa; anfr. planati, utrinque ob- 

 tuse angulati, longitudinaliter lirati, lirae subaequales approximatae, Striae et rugae incre- 



VI. 6. 9. VI. 1902. 7 



