THE NAUTILUS. 101 



0. leucostoma Duel, in Chenu's 111. Conch., pi. 29, f. 14-16. 



0. propinqua Marr., Thes. Conch., pi. xi, f. 141-142. 



0. avelana (Lam.) Marr. Thes. Conch., pi. xi, f. 149-150. 



0. glandiformis Marr. (not Lam.) pars, Thes. Conch., pi. 

 xii, f. 174, 175. 



0. giliola Duel., in Chenu's 111. Conch., pi. 30, f. 5, 6. 

 An extremely variable species, the limits of which are very 

 difficult to define. The figure cited by Bolten is unrecogniza- 

 ble. 0. avelana as figured by Marrat probably represents faded 

 examples, of which I have seen similar colored specimens. 

 Under glandiformis Marrat figures at least two species ; figure 173 

 is a form of elegans, the others probably variations of this spe- 

 cies. The figure referred to by Lamarck as glandiformis can not 

 be identified. 



5. OLIVA BULBOSA (Bolten). 



PorphyriabulbosaBolt., Mus. Bolt., p. 34, 1798. 

 Olivaundulata Lam., Ann. du Mus., xvi, p. 318, 1810. 

 Valuta ventricosa Dillw. , Cat. Recent Shells, i, 515, 1817. 

 Var. inflata Lam., Ann. du Mus., xvi, 319, 1910. 

 picta Reeve, Conch. Icon. Oliva, sp. 79, pi. 26, f. 79 (juv.) 

 ovum-raUi Ford, Proc. Acad. Nat. Sci. Phila., 1889, p. 139. 

 (decorticated). 



Var. tuberosaBolt., Mus. Bolt., p. 37, 1798. 



bicingulata Lam., Ann. du Mus., xvi, p. 319, 1810. 

 bicincta Marr., Thes. Conch., iv, pi. xiii, f. 189. 

 Var. fabagina Lam., Ann. du Mus., xvi, p. 325, 1810. 



crassa (Martini) Marrat, Thes. Conch., iv, pi. xiii, f. 186, 

 The typical form has undulating longitudinal stripes, both 

 Bolten and Lamarck referring to the same figures (Conch. Cab. 

 ii, Tab. 47, f. 507, 508). Var. inflata has only small bluish- 

 gray spots and bicingulata two dark brown bands. Var. fabagina 

 is irregularly clouded with dark brown. Pure white examples 

 constitute the var. alba. 



6. OLIVA VARIEGATA (Bolten) 



Porphyria variegata Bolt, , Mus. Bolt., p. 33, 1798. 

 0. evania Duel, in Chenu's 111. Conch., pi. 22, f. 3, 4. 



