Note 1. A small species with distant sharply elevated lamellae. Note 2. Leptostrophia near Ornataella but the ornamentation is finer & more fasciculate. Note 3. A gently convex species, with orna- mentation varyingly fasciculate. Note 4. A wide species smaller than C. nova-scotica, and more closely striate than the young of C. nova-scotica. Note 5. Two or three species of Dalman- ella are here included, all of them distinct from the Silsomes Cove form: One species shows a strong rumenlature in pedicle valve resembling Schizophoria. Note 6. Near S pulchra Sow. but with stronger dental lamellae. Placations 18-18 angular on interior subrounded exteriorly. Fold seems merely not developed. Rarely 3 median ribs elevated into fold. Note 7. A very finely plicate almost striate form, if this species: Possibly a coarse Dalmanella. Note 8. Without radial ornamentation but having a very strong concentrically ripose ornamentation. Note 9. A species having the principal ornamentation vertical flutings about 1 mm apart in normal adults and at over 25 on surface no finer inter- fluting. In the young stages cancellations are present of which there are no indication in the adult. Note 10. A Prochoeras with slightly elevated spire ornamentation as in Barrande's species but the longitudinal flutings are slightly less pronounced in our shell.