THE NAUTILUS. 143 
130x109x84 mm., being both considerably flatter than the speci- 
mens described by Mr. Pilsbry. 
All my specimens are distinctly narrowed in front, and in this 
particular the species differs essentially from P. patriarcha, which is 
very round in outline. I have aspecimen of patriarcha exactly the 
same width as the two shells above mentioned, namely, 109 mm., 
but its Zength is only 119 mm. Our species is further distinguished 
by its sculpture from both patriarcha and mexicana—the ribs being 
narrower and much more numerous than in patriarcha and decidedly 
heavier than in mexicana. Every 5th or 6th rib in the adult shell 
seems to be more prominent. 
Although my shells are not badly eroded there is but little color 
observable outside, except in spots where smaller limpets have had 
their stations. In such places the peculiar burnt red color so char- 
acteristic of P. argenvillei is seen, and the same color, with an occa- 
sional spot of black, edges the interior of the shell and in a paler 
and browner shade blotches the spatula, which in the young shells 
is sometimes entirely brown. It would seem that the color of the 
interior becomes lighter with age, as is the case in many other spe- 
cles. 
The muscle scar is, as Mr. Pilsbry remarks, strongly marked and 
callous in the adult shell, but in the young, it is not at all noticeable. 
This is the case also with the 2 species with which kermadecensis is 
compared. 
On the whole this is the very finest of the many fine species of lim- 
pets that Mr. Pilsbry has made known to science during the last few 
years. It has no rival in size save P. mexicana, except it be the at 
present unrecognized P. gigantea of Lesson from the Society Islands, 
which may be found to be nearly allied or perhaps identical with 
the present shell. 
NOTICES OF NEW JAPANESE MOLLUSKS, I. 
BY H. A. PILSBRY: 
The species described below were collected by Mr. Frederick 
Stearns of Detroit, Michigan, during his second visit to Japan, in 
1892. They will be illustrated in his Catalogue of Japanese shells, 
now in preparation. 
