164 
Chitonellus striatus of Lamarck describes our South Aus- 
tralian species admirably. Most of the specimens are covered 
with soft velvet seal-like hair, which hardens into bristles 
when dried. I have a few hairless specimens, but this may 
be accounted for by local attrition or disease. The breadth 
of the valves varies so much in striatus that there seems no 
room for var. gunnit. 
C. striatus is found all around the coast of Australia and 
Tasmania. I have collected it in about twenty places on the 
South Australian coast from Port MacDonnell to Nuyt 
Archipelago. The valves in some specimens are of a rich 
deep salmon-pink, while others are a dark-brown. The girdle 
is of a nut-brown when alive, going darker as it dries. It 
delights in the recesses of bunches of Serpularia, and I have 
taken macerated specimens from the stomach of a schnapper. 
T have seen living specimens nearly a foot long. I have dried 
ones 90 x bc we f 
Any 
5d. mayi, Torr, 1912. ‘Pl. y., figs. la-f. 
C. mayi, Torr, Proc., Roy. Soc. Ta smania, 1912, p. 1. ASSL, 
General Appearance.—Shell oblong, very much elevated, 
strongly carinated, side slopes straight.  Colowr.—Creamy- 
white variegated with splashes of reddish-brown; the 
anterior and posterior valves are nearly always red, and this 
colour extends to the girdle. 
Anterior Valve.—Red, smooth to the unaided eye, but 
microscopically regularly granulated and dotted all over with 
minute black dots which look like eyes, 14 to 16 pectinated 
teeth. 
Median Valve.—Lateral area distinctly raised, smooth or 
with slight growth-lines. A broad shallow transverse sulcus 
in the centre of the area containing numbers of eye-dots 
somewhat regularly arranged. On one lateral area on one 
side of a valve 61 of these eye-dots were counted. 
Pleural area deeply longitudinally sulcated with eight to 
twelve grooves, extending from the margin to the dorsal area, 
but growing shorter towards that area. 
Dorsal area triangular, with microscopical irregular 
striations running into the pleural area. 
The median valves have two distinct slits. 
Posterior Valve.—Divided into two distinct areas by a 
raised riblet, the posterior part being similar in colour and 
granulations to the anterior valve, and the upper part creamy- 
white with splashes of red, microscopically granulated, 
numerous eye-dots, mucro median. ‘The division between 
the two parts of this valve is very distinct. The pleural area 
has the same longitudinal sulci as that of the median valve. 
