117 
Ihib. in calcarla miocenica media prope « Marmorilo » clilionis 
alexandrinae Pedemonti!. 
Triceraiium suborbiculare Pantoc. var. subcyclica (1910). 
Valvis minoribus, perimetro fere circulari, centro valde cupula- 
tis, cornubus tribus elatis, sub margine insertis, extrorsum nutanti- 
bus, vix tamen limitem scandentibus, praeditis in margine zonam te- 
nuem pellucidam demonstrantibus in cupula grosse, secus radios irre- 
gulares centro laxius granulatis setis parvulis, e paucis centro notatis. 
Diam. valvarum: 64 [x. 
Distantia inter apices : óo {x. ci re. 
Hab. in calcaria miocenica media prope « Marmorito » ditionis 
alexandrinae Pedemontii. 
— var. tatilimba (1910). 
Valvis magnitudine intermediis margine subcyclicis aream cen- 
tralem cupulato trigonam, grosse sed laxissime granulatam praeben- 
tibus, setis parvulis, e paucis centro aggregatis ornatis, marginibus 
hyalinis, evidentissimis, superficiem complanatam cupulae consculptae 
externam occupantibus; setis parvulis e paucis centro aggregatis. 
Diam. valvarum : 90 {x. 
Distaniia inter apices cornuum: 80 [x. 
Hab. in calcarla miocenica media prope « Marmorito » ditionis 
alexandrinae Pedemontii. 
Triceraiium tridaetylum Brightw. var. saxolana (1912). 
Valvis trigoniis, apicibus digitatis longe productis subacutis, per 
totam superficiem dense punctatis, punctis in area trigonia centrali, 
malori quam in forma typica, irregulariter aggregatis, marginibus 
vice in series lineares subrectas subradiantes ordinatis; spinis quin- 
que irregulariter sub margine insertis, minoribus quam in forma ty- 
pica in qua prope centrum insertis observantur. 
Lateris longitudo : 120 [x. 
Hab. in calcarla miocenica media prope « Monte Gibbio » di- 
tionis saxolanae mutinensis. 
Stictodiscus paraltelus (Grev.) Pantoc. var. Kinìierianus (T. et W.) 
Forti f. minor (1912). 
Valvis trigoniis, apicibus rotundatis punctatis, punctis centro 
laxissime irregulariter ordinatis, peripherice in series radiantes, dis- 
positis, marginem versus gradatim densioribus. 
