(XVIIL.] 
THE MOLLUSCA. 
Part II.—Pelecypoda and Brachiopoda. 
By Cuaries HEDLEY, 
Conchologist, Australian Museum. 
ANOMIA, Sp. 
A few disassociated upper valves, not specifically recognisable, 
were gathered on the lagoon beach of Funafuti. 
ARCA ZEBRA, Swainson, 
Reeve, Conch. Icon., ii., 1844, Arca, pl. xi., sp. 69. 
Abundant under stones at low water in the lagoon. In this 
Museum there are specimens from Trinity Bay, Queensland. 
It is doubtful whether A. occidentalis, Philippi, is distinct. If 
not, the species has a circumequatorial range. 
ARCA MACULATA Sowerby. 
Reeve, Joc. cit., pl. xi., sp. 71. 
One living specimen obtained in the lagoon. 
First found by Cuming at Marutea, in the Paumotus.  Speci- 
mens are in this Museum from Aneiteum, New Hebrides. 
ARCA RETICULATA, G'melin. 
Reeve, loc. cit., pl. xvi., spp. 108, 112 (as A. divaricata, Sowerby). 
Several disassociated valves of this world-wide species were 
observed on the lagoon beach. 
The synonymy and range of this species have been examined at 
length by Lischke.* 
ARCA VELATA, Sowerby. 
Reeve, loc. cit., pl. xii., sp. 79. 
Common in blocks of coral in shallow water in the lagoon. 
First obtained at Marutea, Paumotus, by Cuming. 
* Lischke—Japan Meeres conchylien, ii., 1871, p. 142, iii., 1874, p. 107. 
Smith adds A. dubia, Baird, to the list—Proc. Zool. Soc., 1891, p. 431. 
Further notes will be found in the Proc. Linn. Soc. N.S. W. (2), ix., 1894, 
p. 180; Trans. Roy. Soc. S.A., xix., 1895, p. 261; and Trans. Wagner Free 
Inst. Sci., iii., 1898, p. 628, 
