of forms, each representing a distinct phase in the gradual development of a fundamental form.
Wherever the internal lobes could be laid bare, the antisiphonal lobe was found to terminate in two points, and the termination of the adjacent internal saddle to be one-leafed. The termination of the first lateral saddle is said, by Quenstedt, to be one-leafed in P. tortisulcatum. The embryonal whorls are nearly alike in all the spec'es examined, presenting a close external resemblance, on a very diminutive scale, to certain Goniatites, such as Goniatites tridens, Sandb. The lobes of examples about 2 millims. in diameter assume a Ceratitic character. [Count M.]
2. On the Nomenclature of the Living and Tertiary Brachiopoda of the Kingdom of Naples. By G. Seguenza.
[Bollettino Malacol. Ital., 1870.]
Professor Seguenza has published a critical revision of the Brachiopoda described by Professor Costa in his 'Fauna del regno di Napoli.' It is founded on the materials collected by Costa, and leads the author to the following results : —
Costa's names. Corrected names.
A. Living species.
1. Terebratula vitrea Terebratula vitrea, Born.
— minor, Phil.
2. — caput-serpentis Terebratulina caput-serpentis, Lin.
3. — truncata Megerlia truncata, Lin.
4. Orthis detruncata Argiope decollata, Chemn.
5. — pera — curvata, Risso.
6. — neapolitana — neapolitana, Scacchi.
7. — bifida — neapolitana ?
8. — lunifera Megerlia monstruosa, Scacchi, jun.
9. — monstruosa — monstruosa, Sc.
10. Platydia anomioides Platydia anomioides, Scacchi.
11. Thecidea mediterranea Thecidea mediterranea, Risso.
12. Crania personata Crania turbinata, Poli.
B. Tertiary species.
1. Terebratula vitrea
2. — caput-serpentis Vide supra.
3. — truncata Terebratula ampulla, Brocchi.
4. Terebratula grandis — sp. nov.
5. — biplicata — sinuosa, Brocchi.
— sinuosa, Brocchi.
— minor, Phil.
6. — irregularis Waldheimia cranium, Midi.
— septigera, Loven.
Terebratella septigera, Phil.
7. amigdaloides Waldheimia cranium, Mull.
8. euthyra — cranium, Mull.
9. lucinoides Megerlia eusticta, Phil.
10. bipartita Rhynchonella bipartita, Brocchi.
11. plicato- dentata — bipartita, Brocchi.
12. pauperata — pauperata, Costa.
13. Orthis plicifera Argiope decollata, Chemn.
14. — detruncata
Vide supra.
15. Crania personata
[Count M.]
