THE NAUTILUS. 1 17 



more obtuse, earlier 2^ whorls coiled about in ii plane. The sculp- 

 ture is about as close as in C ptnm'la, but the processes are shorter, 

 the shell larger, more elevated and glossy. 0. perpunctatiis is more 

 depressed, smaller and narrowly umbilicate, while in echizenensis the 

 perforation is almost closed by the reflection of the lip at its axial 

 insertion. Alt. 13, diam. 19 mm., whorls 4^. 



Omiishi, Echizen. Type no. 84256 A. N. S. P., from no. 981 of 

 Mr. Hirase's collection. 



Related to the several species mentioned above, and best described 

 by a comparison with them. 



NOTE ON TRITONIA PALMERI COOPER, 1882. 



BY T. D, A. COCKERELL. 



The type locality of this species is San Diego, California, where it 

 is said to be common. Cooper's description would hardly distinguish 

 it from allied species, but as I know of only one species from southern 

 California according with the description of T. falmeri, 1 assume that 

 it is in fact the animal Cooper had in hand. The following notes, 

 based on a specimen collected by Dr. W. E.. Coe at Deadman's Island, 

 San Pedro, California, July 18, 1901, may serve to facilitate the 

 recognition of the species. The description is from life. 



Length about 17 mm.; white, suffused with yellow dorsally ; ten- 

 tacles pale yellowish-brown ; ends of lamellae yellowish ; dorsum 

 rugose with small warts. Close to T. lineata A. &, H., but differs by 

 its strong yellow suffusion above and absence of opaque white dorsal 

 lines. Ramose branchial lamellae irregularly bi pinnate, five on each 

 side. Veil bilobed, each lobe produced into five or six finger-like 

 filaments (two in T. lineata). Tentacles almost as in T. lineata; with 

 the principal axis cylindrical and truncate, and numerous lateral 

 branched processes, not so long as central axis. No eyes visible. 



The species of Tritonia seem to be most easily distinguished by the 

 character of the veil. T. palmeri has more processes on the veil than 

 T. lineata, but very much fewer than in 2\ hohnbergit, in which, 

 however, they are very short. 



