122 



TAVOLA I V. 



Fig. Num. 



1 Pleurotoma Rochettae Bell. . . . 55 



2 dispaia Jan 56 



3 sublaevis Bell 59 



4 pustulata Brocc 60 



5 turritelloides Bell 57 



6 venusta Bell 58 



7 Brocchii Bon 61 



8 Bellardii Desm 63 



9 brevirostrum Sow 64 



1 crebricosta Bell 65 



I 1 raricosta Bon 66 



12 Dufou ri Dessi 67 



1 3 Borsonia prima Bell 1 



1 4 Raphitoma histrix Jan 1 



1 5 Scacchii Bell 4 



Fig. A'um . 



\ 6 Raphitoma Dcsmoulinsi Bell. . . 9 



1 7 hispidula Jan 10 



1 8 plicatella Jan .11 



1 9 semicoslata Bell 13 



20 submarginata Bon 15 



21 sulcatula Bon 16 



22 bucciniformis Bell 33 



23 cancellina Bon 17 



24 ringens Bell 27 



25 angusta Jan 25 



26 scalaria Jan 29 



27 incrassata Du 31 



28 hypothetica Bell 34 



29 sigmoidea Bronn 32 



30 Pleurotoma laevis Bell 1 



