THE NAUTILUS. 67 



distant and irregular papillae, of which the largest are placed 

 more anteriorly, while the posterior ones are indistinct. A black 

 streak of pigment is present. Also the male has this black pig- 

 rnent,, but the papillae are obsolete. 



Posterior margins of palpi connected at base. Inner lamina 

 of inner gills entirely connected with abdominal sac. Marsu- 

 pium with from 12 to 20 ovisacs. Edge of marsupium with 

 black pigment. Holes at the edge were observed in discharg- 

 ing females. 



Glochidia subspatulate, higher than long. Length: 0.21, 

 height: 0.27 mm. 



Except the black pigment on mantle edge in the posterior re- 

 gion, and on the edge of the marsupium, the color of the soft 

 parts is whitish. 



This species is closely allied to E. vanuxemensis. The papillae 

 in front of the branchial are smaller and less crowded, and the 

 black pigment is not so intense. 



( To he concluded) 



NOTES ON OLIVA. 



BY E. G. VANATTA. 



The Academy of Natural Sciences of Philadelphia having pur- 

 chased the John Ford Collection of Oliva^ the following notes may 

 be useful to those interested in the genus. 



Oliva peruniana Lam. 



The typical form is illustrated in Reeve's Conch. Icon. vol. 

 vi, pi. 9, f. 14 d; Tryon's Man. Conch, vol. v, pi. 18, f. 58. 

 Var. fidgurata Mart., Rve. Conch. Icon. pi. 9, f. 14 b.; 



Try on M. C. pi. 18, f. 56. 

 Var livida Johns. 

 The types are pale lilac with ivory-yellow streaks, A. N. S. 

 P. Coll. No. 111726. Alt. 40, diam. 20 mm. 

 Habitat — unknown. 



Nautilus vol. 24, p. 122 ; Tryon M. C. pi. 18, f. 55 ; Rve. 

 C. I. pi. 9, f. 14 a. 



Var. castanea ' ' Ford ' ' Johns. 



