T. Davidson — Tertiary Brachiopoda. 407 



tula lunifera and Argiope cistellula, he has arrived at the conclusion, 

 that they are both referable to a single species. Sig. Sequenza 

 quotes A. cistellula from the Lower Pliocene of Eometta and Milazzo, 

 near Messina; it is also found in the Quaternary deposits of the 

 same island, and is alive in the Mediterranean. 



45. Argiope loevis (Sequenza), PL XXI., Fig. 13, 13a. Pied- 

 montese Brachiopoda. Annali dell' Accad. degli Aspirant! Naturalisti 

 di Napoli, third series, vol. vi., pi. 3, fig. 2, 1866. 



Whether this species be distinct from the A. lunifera or A. cistel- 

 lula has still to be determined. Sig. Sequenza observes that it 

 approaches to the last named species, as vrell as to A. Neapolitana, 

 but most so to A. megalocepJiala (Sandberger). It was found by Sig. 

 Eovasenda in the Middle Miocene of Grangia in the Hill of Turin. 



46. Argiope (?) Bovasendina (Dav.) PL XXL, Fig. 14, 14a. &. c.d. 

 Shell minute, compressed, almost circular, wider than long, sides 



and front rounded, ventral valve slightly convex, beak hardly pro- 

 jecting and gently incurved ; hinge-line straight, rather more than 

 half the width of the shell; hinge-area triangular, flat; foramen 

 large, laterally margined by a deltidium. Dorsal valve semicircular 

 and very slightly convex, less deep than the opposite valve, and 

 most convex at the umbo ; cardinal angles obtuse, hinge-area narrow. 

 Surface smooth, marked only by a few concentric lines of growth ; 

 shell largely punctured. Length 2|, width 3, depth 1 line. I have 

 examined five examples of this interesting little species, which 

 were found by M. Bayan in his Oligocene stage I. or bed with 

 Bryozoa at Monte Sgreve di Sant Urbano, and not far from Vicenza. 

 In these beds occur, likewise, many examples of Scutella suhrotunda. 

 None of the specimens exhibit the interior so that I cannot feel 

 certain with reference to the genus to which it should be referred. 

 It has much of the external size and shape of some forms of Platidia 

 or Morrisia, but does not show the horse-shoe shaped aperture in the 

 smaller valve, so characteristic of that genus. I have consequently 

 provisionally left it with Argiope. 



47. Thecidium Mediterraneum (Eisso), PL XXL, Fig. 17, 17a, b, 

 18, 19. Eisso Hist. Nat. des Principales Productions de I'Europe 

 Meridionale, vol. iv., p. 344, 1826. Thecidium testudinarium (Miche- 

 lotti). Annali delle Scienze del Eegno Lombardo-Veneto, 1840. 



This is a well-known species, and I had occasion to describe 

 several of its varieties, both recent and fossil in the Geological 

 Ma&azine, Vol. I., 1864, to which the student is referred. 

 Specimens agreeing with those from the Lower Miocene or Oligocene 

 of Bernburg have been found by M. Bayan at Gambugliano and 

 Crosara in the upper portion of his Eocene stage F. The same 

 geologist has also procured it from his stage H. at Castel Goberto, 

 this last locality being situated in the upper portion of his Oligocene 

 or Lower Miocene of Lyell. In the Middle Miocene it occurs in 

 abundance in the Hill of Turin, at Parlascio in Tuscany, and is alive 

 in the Mediterranean. It is not rare in the Island of Malta, at 

 Peyrehorade (Landes), and in several other continental localities. 



{To be concluded in the October Number.) 



