THE NAUTILUS. 115 



hepatica Marr. (not Lamarck), Thes. Conch., iv, pi. 3, f. 



27, 28. 



formosa Marr., Thes. Conch., iv, pi. 3, f. 29, 30. 

 Var. olorinella Duel, in Chenu's 111. Conch., ii. pi. 7, f. 

 15, 16. 



quersolina Duel, in Chenu's 111. Conch., ii, pi. 11, f. 7, 8. 

 pallida Marr. (not Svvainson), Thes. Conch, pi. 25, f. 

 472. 



Although not as variable as its Pacific analogue, 0. spicata, 

 from the west coast of Mexico and Central America, there are 

 several well marked variations and some confusion owing to 

 many of the older authors uniting some forms of the two species. 

 Var. nivosa is the large cylindrical form ; when banded with 

 brown it is the bifasciata. The white form is olorinella. 0. pal- 

 lida Marr. may possibly represent the albino form of another 

 species. 



OLIVA FULGURATOR (Bolten). 



Porphyria fulgurator Bolten, Mus. Bolt., p. 36, 1798. 

 0. fusiformis Lam., Ann. du Mus., xvi, p. 318, 1810. 

 0. ispidula Link, Besch. Rostock, Samml., part 2, 1807 ; 

 Marrat, Thes. Conch., iv, pi. 2, f. 15-17. 

 bullata Marr., Thes. Conch., iv, pi. 24, f. 448. 

 Var. obesina Duel., in Chenu's 111. Conch., ii, pi. 17, f. 9, 10. 

 Both Bolten and Lamarck refer to the same figure by Martini 

 (Conch. Cab. ii, tab. 51, f. 562). Specimens are frequently 

 more or less clouded with brown. 



OLIVA SPICATA (Bolten). 



Porphyria spicata Bolt., Mus. Bolt., p. 35, 1798. 



P. arachnoidea Bolt., Muss. Bolt., p. 36, 1798. 



P. litterata Bolt., Mus. Bolt., p. 36, 1798 (not Lamarck, 



1810). 



0. araneosa Lam., Ann. du Mus., xvi, p. 315, 1810. 

 0. melchersi Menke, Zeit. fur Mai., p. 24, 1851. 

 Var. hemphilli Johns., NAUTILUS xxiv, 122, 1911. 

 Var. subangulata Philippi, Abb., xix, tab. 1, f. 2. 

 Var. oniska Duel., in Chenu's 111. Conch., ii, pi. 32, f. 9. 

 perfecla Johns. , NAUTILUS xxiv, 122, 1911. 



