98 THE NAUTILUS. 



Var. olympiadina Duel, (pars) in Chenu's 111. Conch., pi. 13, 

 f. 11, 12. 



Var. nobilis Reeve, Conch. Icon., vi, pi. 2, figs 3 a-c, 1850. 

 Var. pica Lam., Ann. du Mus., xvi, 310, 1810. 



concinna Marr. , Thes. Conch., iv, pi. 7, f. 100, 101. 

 Var. tenebrosa Marr. , Thes. Conch., iv, pi. 13, f. 177. 

 Var. ponderosa Duclos, in Chenu's 111. Conch., pi. 14. f, 8, 9. 

 Var. miniacea Bolten, Mus. Bolt., p. 33, 1798. 



miniata Link, Besch. Rostock Samml. , pi. 2, p. 95, 1807. 

 erythrostoma Lam., Ann. Du Mus., xvi, 309, 1810. 

 magnified Ducros, Revue critique du genre Oliva, p. 30, pi. 

 1, f. 4. 1857. 



azemula Duclos, in Chenu's 111. Conch., pi. 15. f. 10, 11, 

 (decorticated) 



Var. porphyritica Marr. (pars) Thes. Conch., pi. 7, f. 105. 

 Var. sylvia Duclos (pars) in Chenu's 111. Conch., pi. 14, f. 12. 

 Var. marrati Johns., Naut., vol. xxiv, p. 51, 1910. 

 la. Subsp. irisans Lamarck, Ann. du Mus., xvi, 312, 1810. 

 Var. zeihmica Lam., Anim. sans vert., vii, 436, 1822. 



mazaris Duel, in Chenu's 111. Conch., pi. 22, f. 7, 8. 

 Var. ornata Marrat, Illus. Conch., iv, pi. 7, f. 102, 103. 



cylindrica Marr. (not Sowerby) Thes. Conch, iv, p. 14, f. 

 193, 594. 



lignaria Marr., Illus. Conch., iv, pi. 14, f. 195, 196. 

 Var. cryptospira Ford, Proc. Acad. Nat. Sci. Phila., 1891, p. 

 99, f. 3, 4. 



Var. fordii Johnson, Naut., vol. xxiv, pi. 51, 1910. 

 Both Bolton and Lamarck refer to the same figure in Martini 

 (Conch. Cab., ii, tab. 51, f. 559) which represents the finely 

 marked, indistinctly banded form, with a light cream-yellow 

 aperture. Length 70-85 mm. 



Under the Var. tremulina is grouped a large series connecting 

 sericea with miniacea, but typified by having a white or bluish 

 white aperture. It was not figured by Lamarck but all the 

 authors seem to agree although several intermediate figures 

 are given. The typical form is that figured by Reeve, pi. 4, f. 

 6c ; Weinkauff, pi. 17, f. 2 ; Marrat, pi. 8, f. 117. 0. fumosa is 

 only a dark smoky form. The Var. olympiadina is restricted to 



