12 NILS HJ. ODHNER, MOLLUSCA. 
C. omaria Hwass var. colubrinus Lamarck, 2 shs, max. |. 47 mm. 
Melo diadema Lamarck, 10 shs, max. |. 36 em, br. 24 em. 
Voluta reticulata Reeve, 2 shs, max. h. 90 mm. 
V. oblita E. A. Smurru 1909 (= V. norrisii SowerBy, non Gray; Reeve, Conch. 
Icon., 6, fig. 15), 2 shs, max. h. 67 mm. Both specimens have strong spines on the 
shoulder of the whorls (about 12 in one turn). The smaller shell is exactly like the 
fig. 15 given by Rerve, and somewhat broader than the larger one, which, however, 
even in its colouration with indistinct brown lines shows that it belongs to the 
present species. Mr. Smiru has shown that V. norrisii of Gray is a distinct species, 
not identical with the present form. According to Smiru, V. oblita is recorded from 
N. W. Australia and from King George’s Sound (cf. also HepLey 1916). 
Bulla tenuisculpta n. sp. (PI. 1, figs. 1—3). Shell ovoid, everywhere with well 
rounded outlines, rather thin and shining, except for fine, sparse, engraved, some- 
what undulating lines towards the base and around the apex, and thin longitudinal 
cords most noticeable towards the apex. Apical perforation moderate with some spiral 
striations. Colour marbled with small white and reddish brown confluent dots and 
four revolving series of indistinct, somewhat dark, clouds. In the interior of the 
aperture the colouring shines through. Columella slightly sinuous with a thin callous 
margin spreading a fragile layer over the parietal wall to the apex. Maximum dimen- 
sions: height 33, breadth 22,-diameter of apical perforation 1.5 mm. 
This species seems to be closely related to B. quoyi GRay in the presence of 
its fine impressed striae towards the base, but as these occur also around the apex 
and its size is more considerable than that of B. quoyi, which is, further, more solid, 
I have considered the present form to be a distinct species. Seven empty specim- 
ens were found on the shore of Broome. 
Octopus membranaceus Quoy & Gaimarp, Wollal telegraph station, 30 miles 
NE., 12 feet (*/6), 2 sps, max. l. 25 mm. 
Tonica truncata Sowrersy. Broome, low water, on the shore (°°/7), 3 sps, 
resembling in colour and sculpture the figure in Reve (1847, Pl. 16, fig. 93) and 
Pinspry (1893, Pl. 40, figs. 1, 2). Colour light grayish, girdle with brown stripes 
radiating from each valve. Valves of a yellowish gray colour with dark gray longit- 
udinal stripes, on the lateral areas often confluent into spots that may stretch 
over the whole valve; anterior valve minutely punctate all over by the presence of 
esthetic eyes. 
Max. length 35 mm, breadth 25 mm. 
The valves exhibit the peculiarity of being separated laterally by interjacent 
snibs from the girdle. In the anterior valve there are 8 slits, in the median 1, and 
in the posterior 14. There seems to be only a slight difference in the form of the 
valves, these being in the present specimens more than usually extended laterally. 
The species has been previously recorded from the Philippines (cf. Pinspry 1893). 
