BIBLIOGRAPHY OF 1875. 207 



Seguenza (Prof. G.) — Palaeontological Studies of the 

 Malacological Fauna of the pliocene sediments 

 deposited at great depths. — Studi paleontologici sulla 

 fauna malacologica dei sedimenti pliocenici depositatisi a 

 grandi profondita. — Bull. See. Mai. Ital. 1875, i.pp. 99 to 124. 



After a general introduction the author discusses the pliocene 

 formations, their limits and their partition; then of their deposition 

 in deep water; the deep-sea pliocene is next compared with the 

 littoral pliocene; and the paper concludes with an extended 

 bibliography of the subject. 



Stearns (R. E. C.) — Descriptions of New Fossil Shells 

 from the Tertiary of California. — Proc. Acad. Nat. Sci. 

 Philad. r875, pp. 463, 464 and plate xxvii. 



Opalia varicostata and O. anomala are the new species 

 described. 



Stefani (Carlo de). — New Pliocene Mollusca from Tus- 

 cany. — Descrizione delle nuove specie diMolluschi pliocenici 

 raccolte nei dintorni di San Miniato al Tedesco. — Bull. Soc. 

 Mai. Ital. 1875, i. pp. 74 to 79 and plate. 



Venus ^/w/ifi^/Meneghini, Cytherea subappenninica Meneghini, 

 Melampiis ^'^/-r^'j'/Tournouer, and Rissoa Meneghiniana De Stefani, 

 are described and figured. 



Stefani (Carlo de), — New Italian Pliocene Mollusca. — 



Descrizione di nuove specie di MoUuschi pUocenici Italiani. — 

 Bull. Soc. Mai. Ital. 1875, i. pp. 80 to 88 and plates. 



Murex Soldanii Meneghini, M. dumosus De Stefani, Chem- 

 nitzia varicosa De Stefani, Scalaria fenestrata Meneghini, Pleuro- 

 tonia Angelonii Meneghini, P. UAnconce De Stefani, P. Cocconii 

 De Stefani, Rissoina Volaterrana De Stefani, Trochiis tricinUus De 

 Stefani, and Area lineolata De Stefani, are described and figured. 



