QUEENSLAND MOLLUSCAN NOTES, No. 1. 
2G3 
Family ARCIDiE. 
This family continues to offer novelties whenever any series is collected. 
The Rev. Percy Hubbard sent some shells from Innisfail, and two were not 
easily located. Then one was found to agree with Area crebricostata Reeve 
(Conch. Icon., vol. ii, Area, pi. ix, sp. and f. 61, March 1844: the original locality 
being unknown), an unexpected addition to the Australian list. This species 
had not been seen since his description, and is referable to Atmdam Gray. The 
other provided an interesting case, as one valve was found to differ in shape and 
sculpture from the other, and the record of Area dafhrata Reeve in the Queens- 
land list was made on one valve. Reeve's species was described from the 
Philippines, was equivalve, the valves similarly sculptured, and the name is 
preoccupied and therefore invalid. Consequently, the shell from Innisfail is 
here described as a new species, and, as it does not seem to fall into any well- 
known group, the new generic name fntparilarca is introduced, I. hubbardi being 
named as type. 
Imparilarca hubbardi gen. & sp. nov. 
(Plate XXX, figs. 1, 2.) 
Shell elongate oval, convex, inequivalve, subeq trilateral, umbones distant, 
ligament area very large, strongly angulate posteriorly. Colour of dead shells 
brownish, white. Left valve with twenty to twenty-two ribs, which are elevated 
with dee]) narrow interstices less than the width of ribs; these are strongly 
corrugated inarginad (that is, towards the margin), nodulous umbonad (that 
is, towards the umbo), interstices notably concentrically striate, anterior ribs not 
differing, posterior ones more distant and less corrugated. Right valve with 
twenty-two to twenty-four ribs, narrow elevated with deep broad interstices 
more than width of ribs which are smooth, anterior ones showing modified 
corrugation, strong keel posteriorly, posterior ribbing not crenate. Length 
50 mm.; height 35 mm.; depth of conjoined valves 32 mm. 
hirst sent by the Rev. Percy Hubbard, after whom I have great pleasure 
in naming it, from Innisfail, this species has been found to extend along the 
v hole coast of Queensland from (. aloiindra. to (’ape York. It had. been deter- 
mined as A rca clciihrata Reeve, but the description does not altogether agree, 
and the name is invalid. Reeve's cMlmidhvni ( Conch . Icon., vol. ii, pi. vii, sp. 
and f. 43, Pel). 1844) from the Philippines belongs to this series, but is decidedly 
not eonspoeific, Rung quite a different shape. Our species is more like Reeve’s 
rotundicoslota (id. ib., pi. vii, f. 46) from unknown locality, but that species 
is described as equivalve, and the right valve is figured with nodose sculpture. 
A specimen in the Australian Museum from North-west Australia, 
measuring 65 by 40 by 45 mm., is apparently referable to this species, and 
shows a blackish brown periostracum between the ribs inarginad. This specimen 
had been compared by the late E. A. Smith with Reeve’s types in the British 
Museum, and it was returned as a. new unnamed species. 
Rochefortia exeellens Bed ley. 
This species was well figured by Hedley (Kec. Aust. Mus., viii, p. 134, 
pi. xl, figs. 5, 6, 7, 8, May 6. 1912) from Green Island, and it is obviously out of 
its generic location. Later he identified his species with Pythiva cumingii A 
Adams (Proc. Zook Soc. (Bond.) 1856, p. 47: Philippine Islands) and placed 
it in the genus Lepton. Jt was very common as valves on Michaelmas Cav, and 
1 here propose the new generic name Bar rimy sia , naming it. excellent I led ley 
