T. Davidson — Tertiary Brachiopoda. 461 



Costa, and Sequenza mention it from Altavilla near Palermo and 

 Plemmirio, Fiumefreddo, etc., in Calabria. In the Lower Pliocene, 

 it occurs at Orciano, Livorno, and Siena in Tuscany ; in Calabria and 

 in the district of Messina. It has been likewise collected by M. 

 Geny at Beaumette, Nice ; by Dr. Battersby at Biot near Cannes ; 

 and at Cerro di San Anton, Malaga, by Mr. Champemowne. I have 

 also described specimens from the Island of Malta. 



49. RhyncTionella Bolcensis (Massalongo), PL XX., Fig. 4 and 4«. 

 Ter. Bolcensis (Massalongo). Schizzo Geognostico sulla valle del 

 Progno o Torrente d'lllasi, etc., p. 18. Yerona, 1850. 



Shell small and smooth, somewhat obtusely five-sided, about as 

 wide as long, broadest posteriorly, truncated in front. Ventral valve 

 moderately convex, with a broad sinus commencing at about the 

 middle of the shell and extending to the front ; beak small, acute, 

 and incurved ; foramen minute. Dorsal valve most convex at the 

 umbo, mesial fold wide and flattened, shell structure fibrous. Length 

 5, width 5, depth 2i\ lines. 



This little shell appears to be pretty constant in its shape and 

 dimensions, and is a much smaller species than is either i?A. decipiens 

 or Bh. complanata, and to which it bears some resemblance in form, 

 but not in size. Sig. Massalongo states it to be very abundant in the 

 Eocene at Bolca and Monte Spilecco. M. Bayan and Sig. Meneghini 

 have procured it from the same localities. At Bolca it occurs in a 

 small bed formed of a loosely aggregated greensand, with a peculiar 

 local facies, and with it are found Ter. Bayaniana, Bh. folymorpha, 

 and several other remarkable fossils. 



50. Bhynchonella complanata (Brocchi), PI. XX., Fig. 5. Anomia 

 ■complanata (Brocchi). Conch. Foss. Subap., vol. 2, p. 469, pi. x., 

 fig. 6, 1814; and Sequenza, Annali dell' Accad. degli Aspiranti 

 Naturalisti di Napoli, third series, vol. 6, pi ii., fig. 3, 1866. 



In external shape this species somewhat resembles an exceedingly 

 flattened specimen of Bh. hipartita, but its frontal line is much 

 more straight, and its fold and sinus considerably flatter. It is 

 smooth, and when full grown attains to nearly the dimensions of the 

 last-named species. Brocchi's figure does not convey a correct idea 

 of the species, but it was subsequently well described and illustrated 

 by Sig. Sequenza, and I am, moreover, indebted to Sig. Eovasenda 

 for several excellent examples. It occurs in the Middle Miocene of 

 Gassino near Turin. Brocchi's specimen was found near Pienza and 

 St. Dalmazio in Tuscany, and it is also said to occur in the Upper 

 Miocene at Butera (?). 



51. Bhynchonella sicula (Sequenza), MSS., PI. XX., Fig. 6. 



This remarkable species will be fully described and illustrated by 

 Sig. Sequenza. It is triangular, broadest anteriorly, and tapering at 

 the beaks. The valves are moderately convex and smooth, without 

 either fold or sinus. Bh. sicula was found by Count Al. Spada and 

 Sig. Sequenza in the Older Pliocene (Zancleano) near Messina in 

 Sicily. 



52. Bhynchonella polymorpha (Massalongo), PI. XX., Fig. 14-19. 

 Ter. polymorpha, N.S. (Massalongo). Schizzo Geognostico sulla valle 



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