PACE: ON THE GENUS PSEUDAMYCLA. 269 
form a dark band at the periphery, as do the markings of P. dermestoidea. 
The dark coloration, red or brown, of the peristome seems to be 
absolutely diagnostic. The periostracum is usually dark in colour, and 
not greenish, but yellowish to umber-brown in tint. 
The operculum, while resembling that of P. dermestoidea, appears to 
be even more variable than in that species. 
External characters of Animal.—The following particulars regarding 
the external characters are based upon the examination of the soft 
parts of three individuals soaked out from shells in my own collection. 
The body appeared thickly covered with brown speckling, the 
pigmentation extending over even the sole of the foot. The tips of the 
tentacles are unpigmented, and the line of demarcation is quite sharp. 
The introvert is pigmented. The tentacles, which appeared to be very 
short and blunt, are connate. The eye-spots are large, and are situated 
dorsally near the bases of the tentacles. The foot is somewhat 
expanded anteriorly, and its front margin is very prominently 
duplicated ; posteriorly it appeared to be bluntly pointed, and was 
apparently destitute of caudal tentacles. The penis is of large size, 
and is long and tapering in form. At first it is directed forwards, but 
it almost immediately becomes sharply twisted and bent upon itself, 
so that its pointed extremity is directed posteriorly. The penis 
is perforated by a wide central lumen, and the external opening is 
terminal in position. 
The radula of P. miltostoma is very similar to that of P. dermestoidea ; 
it is, however, considerably smaller, and contains a lesser number of 
teeth—about 85 rows. The teeth are not so large as those of 
P. dermestoidea, and they are even more attenuated than they are in 
that species: the central tooth also is less strongly dentate. 
1 The caudal tentacles recorded, with considerable hesitation, as present in P. dermes- 
toidea, will probably prove not to exist in that form either. 
