WEST AMEKICAN PYRAMIDELLID MOLLUSKS. 5 



identify them. They were more fully described later. The same 

 author in the Annals and Magazine of Natural History for 1864, 

 pages 46-47, describes Oheliscus variegatus, Odostomia (Evalea) sequi- 

 sculpta and delicatula, and Chrysallida angusta. In the same publi- 

 cation for 1865 he describes Odostomia satura, gouldii, nuciformis, 

 ai^ellana, fenuisculpta, and injlata; Chemnitzia crehrijilata, variety sty- 

 lina, and virgo; Dunkeria laminata; and Chemnitzia codata. 



In the Journal de Conchyliologie for April, 1865, Doctor Carpenter 

 names Odostomia straminea, Chemnitzia tridentata, and (var, ?) auran- 

 tia. The last contribution to the knowledge of this group made by 

 Doctor Carpenter was during the following year, when in the Pro- 

 ceedings of the California Academy of Sciences, page 219, he describes 

 Chrysallida pumila. 



William M. Gabb, in the same publication (p. 186) a year earlier 

 had added Turhonilla gracillima (now T. gahbiana) to the California 

 fauna. 



In a separate publication on the minute shells found on imported 

 pearl oysters, and entitled "Les Meleagrinicoles," in 1867 the Mar- 

 quis de Folin describes from the Pacific coast ( ?) Turhonilla f estiva and 

 Chemnitzia rangii. 



In 1870, in the American Journal of Conchology, page 66, Dr. J. G. 

 Cooper changes the preoccupied name Turhonilla gracillima Gabb 

 into T. gahbiana Cooper. 



In the series entitled "Les Fonds de la Mer," vol. 2, 1872, the Mar- 

 quis de Folin describes the following species: Salassia carinata; 

 Noemia proxima, pulchra, angusta, with varieties contracta and ovata; 

 Odetta recta and elegans. 



Among some Vancouver shells described in the Annals and Maga- 

 zine of Natural History for 1880, by Mr. E. A. Smith, we find Chem- 

 nitzia lordi. 



In the report on the Gastropoda of the Blake expedition, 1889, 

 Dall describes Pyramidella auricoma: and in the Bulletin of the 

 Natural History Society of British Columbia, 1897, page 14, he 

 names Mumiola tenuis, subsequently found to be preoccupied, and 

 renamed Odostomia {Menestho) pharcida Dall and Bartsch. 



In Zoe (vol. 4, 1894, p. 395), Hemphill named a shell Eulimella 

 occidentalis , but this has proved not to be a Pyramidellid. 



In a monograph in the new edition of the Conchylien Cabinet of 

 Martini and Chemnitz, Clessin named Odostomia Jcrausei and pana- 

 mensis, in 1900. 



In a memoir by Dr. Ralph Arnold on the Marine Pliocene and 

 Pleistocene of San Pedi-o, California, the portion relating to the 

 Pyramidellidae was prepared by the authors of the present paper, 

 March, 1903. Twenty-three species are treated of, the types of 

 which are in the National Museum, and of these the following are 

 2565— Bull. 68—09 2 



