BY T. HARVEY JOHNSTON AND OTTO S. HIRSCHFELD. 53 
tumidula in the British Museum ; the form murphiana is 
common, I have two or three specimens.” The two species 
are quite dissimilar in their shell characters (see later under 
L. murphiana) and moreover, as far as we know, they do 
not occur in the same locality. All early records of plants 
and animals from “‘ Moreton Bay” should be critically 
re-examined since the name was given, not only to the bay 
in South-eastern Queensland, but also to a very large 
district (the Moreton Bay District) embracing the whole 
of North-eastern Australia, which became subsequently 
(December, 1859) separated from New South Wales as 
a distinct colony under the name of Queensland. Our 
records show that L. tumidula occurs in Hervey Bay, which 
is in the vicinity of the main line of junction of the Indo- 
Pacific and southern elements of the Eastern Australian 
fauna, Frazer Island (Great Sandy Island) forming the 
boundary. 
L. hirundo Reeve. 
This was briefly desciibed as a little semi-transparent. 
species, length 11 lines, breadth 43 inches ; with the shell 
oblong square, thin, greenish, posteriorly abruptly attenu- 
ated, and umbones rather sharp. (Reeve 1859, pl. 2, fig. 
7; Sowerby 1846, p. 339; Davidson 1888, p. 220, pl. 28, 
fig. 22). Reeve’s material came from Port Curtis. 
Davidson, who published Reeve’s account and figure, 
placed it among the uncertain species, though Dall (1878, 
p- 203) accepted it as valid. Adams (1863, p. 101) in his 
very bricf unfigured account of L. smaragdina Adams from 
mud from 10 fathoms from Japan and the China Seas, 
mentioned that it more closely resembled JL. hirundo. 
Adams’ species was subsequently figured by Davidson 
(1888, p. 220, pl. 28, fig. 25; 1875, p. 310, pl. 30, fig. 2), 
but an examination of it does not show any resemblance to 
L. hirundo. Davidson (1888) mentioned that the Japanese 
specimens examined by him bear much resemblance to the 
young of L. anatina. The ratio of length to breadth as 
published for L. hirundois 2.44. Theformand proportions 
do not agree with young specimens of L. bancrofti from 
Burnett Head which is in the vicinity of Port Curtis, 
whereas the ratio as well as the colour and shell characters 
