a 
r e 
— 69 — 
larum ornata, linea media lineari angusta. Diam, 0,0008”. 
Hab. in mari adriatico rarissime. | 
Campylodiscus Lorenzianus nov. spee. Gampylodiscus 
orbicularis, costis non interruptis subradiantibus semel leviter 
genullexis, 6 —7 in 0,001”, area media lineari anguslissima. 
Diam. 0,0017 — 0,0032”. Hab. in fundo maris adriatici, nec 
non ut videlur rarissime in mari rubro. 
Campylodiseus quarnerensis nov. spec. Campylodiscus 
suborbieularis utroque fine valde replicatus, costis subradianti- 
bus leviter areuatis numerosis 13 — 15 in 0,001 area media 
-lanceolata. Diam. 0,0023—0,0024”. Hab. in mari adriatico 
rasissime. | 
Campylodiscus Heufleri nov. spec. Campylodiseus minor 
orbieularis, costis subradiantibus leviter flexuosis 10 n 0,001”, 
sulca angustissima are® medie approximala interruplis, area 
media lineari lanceolata, striis punctatis obsoletis. Diam. valva 
0,0016—0,0018”. Hab. in mari rubro. | 
Surirella quarnerensis nov. spec. $urirella minor, valvis 
late ovalibus costis lineam mediam attingenlibus subradiantibus 
16—18 in 0,001”, striis punctatis 32—36 in 0,001. Longit. 
0,00065 — 0,0013”, latid. valve 0,0004 — 0,0007”. Hab. in 
mari adriatico ut videlur rarissima, | 
Surirella graeilis nov. spec. (?) Surirella a latere pri- 
mario linearis apicibus cuneatis obtusis, coslis in media valve 
parte tenuioribus lineam mediam atlingenlibus marginem versus 
distinetioribus 12—14 in 0,001, striis punetatis subtillimis 30 
in 0.001.  Longit. 0,00:0—0,0050. Tryblionella gracilis 
W. Smith, brit. Diat. X. 75?? Hab. in aqua stägnante ut 
videtur rarissima. 
Surirella Lorenziana nov. spec. Surirella major a latere 
seeundario late lineari oblonga apicibns rotundatis, carin® eir- 
euilu medio constricto panduriformi, costis aream mediam ver- 
sus tantum distinelis, carinam versus dilalatis explanatis difhi- 
eile conspicuis tenuiler striato punetatis, 4 in 0,001”, area 
media auguste lineari fines versus leviter dilatata, valvae apices . 
non altingente. Longit. 0,0048” Latid. valve 0,0019”. 
ab. in fundo maris adriatiei rarissima. 
Surirella fluminensis nov. spec. Surirella mediocris 
valvis cuneatis ovato oblongis, apice rotundalis , coslis apicem 
versus subradianlibus,, lineam mediam anguste linearem versus 
distinctioribus, 5—6 in 0,001” interstitiis tenuiter striato 
punetatis. Longit. 0,0027—0,0035”. Latid. valve 0,0013 — 
0,0015”. Hab, in fundo maris adrialiei ul videtur rara. 
Amphipleura Lindheimeri nov. spec. Amphipleura major, 
valvis longe rhomboideo lanceolatis, apieibus obtusiusculis, ca- 
rina media nodulis terminalibus longis linearibus canaliculo tenui 
