THE NAUTILUS. 27 



are represented nearly over the range of the species which ex- 

 tends from San Francisco Bay, south to Salina Cruz, Mexico, 

 and perhaps even farther. 



C. (Astyris') variegata Stearns. 1873, is preoccupied by C. 

 variegata Menke, 1828, and may take the specific name of 

 hypodra. 



Nitidella filosa Stearns, being preoccupied was called Colum- 

 bella stearnsi by Trj r on, 1883 ; it is referable to the genus Aesopus. 

 A minute species four millimeters long, of a whitish color more 

 or less tinged or spotted with brown, almost duplicates Aesopus 

 stearnsi in form and sculpture, though so much smaller than 

 the Florida species. I have named it Aesopus myrmecoon. It 

 ranges from San Pedro, California, to Point Abreojos, Lower 

 California. (U. S. Nat. Museum Cat. No. 105498). 



The genus Amphissa H. and A. Adams, 1853, is characteris- 

 tic of the Northwest Coast, and is typified by " Buccinum" 

 corrugatum Reeve, 1846. But this is not the Buccinwn corru- 

 gation of Brocchi, 1814, and, since it is very abundant on 

 the coast of British Columbia and in Puget Sound, it may 

 take the name columbiana. It ranges from the Alaska Penin- 

 sula to San Pedro, California. 



The Amphissa bicolor Dall, 1892, was unfortunately named. 

 When fresh it presented distinct brown spiral bands on a pale 

 olivaceous ground, but, as in many of the deep-water species, 

 the coloration has not proved permanent and the banding is now 

 hardly perceptible, the whole shell being of a light olive tint. 



Amphissa versicolor Dall, 1871, ranges from Oregon to San 

 Diego, with its metropolis apparently in the Bay of Monterey. 

 There are several marked varieties: cymata Dall, with distinct 

 brown axially waved lines on a white ground; lineata Stearns, 

 1872; incisa Dall, with sharply cut regular sculpture and 

 beautifully mottled coloration (U. S. Nat. Mus. Cat. No. 223- 

 294); and reticulata Dall, of a uniform whitish color, very acute 

 spire, and fine regular corded spiral sculpture crossed by about 

 17 nearly straight axial narrow ribs. This form is usually in 

 rather deep water, and ranges from Port Althorp, Alaska, to off 

 San Diego, California in 62 to 183 fathoms. It is about the 

 same size as A. versicolor but has a much more acute snire and 



