580 PLIOCENE MOLLUSCA. 



conform more or less nearly to these details. M. Dautzenberg has kindly 

 verified my specimens, and has identified one of them (fig. 47) with var. elongata, 

 Philippi. Mr. Marshall records the existence of a variety which has the longitudinal 

 cost^ obsolete on the last whorl, the result, he thinks, of a fresh start in growth 

 after a breakdown or rest.^ 



Genus MIRALDA, A.Adams, 1863. 



Miralda excavata (Philippi). Plate XLIX, fig. 50. 



1836 — 44 Rissoa excavata, Philijipi, Euum. Moll. Sic, vol. i, p. 154, pi. x, fig. 6, 1836; vol. ii, 



p. 128, 1844. 

 1848 — 84. Odostomia excaiata, Jeffreys, Ann. Mag. Nat. Hist. [2], vol. ii, p. 345, 1848 ; Brit. Conch., 



vol. iv, p. 158, 1867 ; vol. v, p. 213, pi. Ixsv, fig. 6, 1889 ; Proc. Zool. Soc. Loml., p. 362, 1884. 

 1853. Odostomia excavata, Forbes and Hauley, Brit. Moll., vol. iii, p. 305, pi. xcvii, figs. 3, 4. 

 1859. Odostomia excavata, G. B. Sowerby, 111. lud. Brit. Shells, pi. xvii, fig. 31. 

 1873—76. Turhonilla excavata, Segueuza, Boll. E. Com. Geol. Ital., vol. iv, p. 354, no. 299, 1873 ; 



T. (Pyrgolina) excavata, vol. vii, p. 92, no. 554, 1876. 



1883. Odostomia excavata, Bucquoy, Dautzenberg et Dollfus, Moll. mar. Rousillou, vol. i, p. 177, 

 pi. xix, figs. 16, 17. 



1884. Miralda excavata, Monterosato, Nomen. Gen. e Spec. Conch. Medit., vol. xiii, p. 85. 

 1890. Odostomia excavata, A. Bell, Proc. Eoy. Phys. Soc. Edinb., vol. x, p. 296. 



1890. Parthenina (Miralda) excavata, Carus, Prod. Faun. Medit., vol. ii, p. 276. 



1892. Parthenina excavata, Locard, Coq. mar. Cotes de France, p. 145. 



1892. Pyrgotina (Miralda.) excavata, Sacco, Moll. Terr. Terz. Pieni., pt. xi, p. 70. 



1901. Miralda excavata, Conch. Soc. List, Journ. of Conch., vol. x, no. 452, p. 20. 



1905. Parthenina excavata, Kobelt, Icon, schaleutrag. eiirop. Meeresconch., vol. iii, 'p. 132, pi. Ixxi, 



figs. 21—25. 

 1913 — 17. Miralda excavata, Dautzenberg, Feuille Jeunes Natur., vol. xliv, p. 37, pi. iii, figs. 16, 17, 



1913 ; Fiinicularia excavata, Journ. de Couch., vol. Ixiii, p. 68, 1917. 



Specific Characters. — Shell small, |)yramidal, solid ; whorls 6, turreted, flat- 

 tened, sharply angnlate with a distinct shelf below the suture, gradually enlarging, 

 the last about half the total length ; ornamented by spiral ridges, strong and 

 prominent, three on the body-whorl, two on the others, the upper one just below 

 the suture, crossed ol^liquely by sharp and raised longitudinal ribs which extend 

 to. the hn&e and give the shell a strongly cancellated appearance, the points of 

 intersection being nodulous ; spire rather short, tapering to a rounded and blunt 

 apex ; suture deep and wide, slightly oblique ; mouth oval, squarely angulate 

 above, expanded below ; outer lip abruptly recurved on the peripheral ridge. 



Dimensions. — L. 3 mm. B. 1'5 mm. 



Journ. of Conch., vol. ix, p. 295, 1900.' 



