RECORDS OF IV. A. MUSEUM. 
[77 
probably small ; folds sharp, narrow, punctate, slightly arched, with 
the concavity towards the apex, alternating at the side angles, 
interrupted in the middle of their length but rarely alternating, 
furrows wide — ten to twelve in the space of ionim., becoming 
narrower and more crowded towards the apex — side angles de- 
pressed, indistinctly preserved. 
This Conulavia is nearly related to the two Australian species 
C. levigata (Morris ) 1 and C. inovnata (Dana ). 2 It differs from both 
in having its thin, sharp folds punctate; the section of the shell is 
unknown, as the examples are all fragmentary, but one worn 
example suggests that the tube was rectangular in section. C. 
quadrisulcata (Miller ) 3 has a much greater apical angle, with folds 
punctate but much more crowded than on the Byro Station fossils. 
Conulavia wavtlu (Waagen ), 4 collected by Dr. Warth in Chel 
Hill and at Dillur, can hardly be distinguished from the Byro plains 
shell in its general features, but a most careful examination with a 
lens failed to reveal the “ fine, somewhat irregular, plication that 
extends transversely over the spaces or valleys between the single 
ribs,” visible on the Indian fossil. 
The presence of the inter-costal tubercle at the angles of the 
tube could not be definitely ascertained owing to the imperfect 
nature of the fossil. 
The Conulavia clearly shows a closer affinity to this Indian 
form than to the Permo-Carboniferous species of Eastern Australia. 
In his monograph, Dr. Waagen states that the Indian C. wavthi 
is associated with the so-called Boulder Beds, which are now con- 
sidered to be the result of a glacial period of Permo-Carboniferous 
age. It is of the utmost geological and palaeontological importance 
to find that a closely allied, if not identical, species of Conulavia has 
been obtained from strata intimately connected with the Western 
Australian Boulder Beds. 
The genus has not previously been recorded from Western 
Australian Sediments. 
1 J Morris, in Strzetecki's Physical Descriptions of N.S. Wales and Van 
Diemen’s Land, p 290, plate xvm., fig. 9, 1842. 
1 ]. D. Dana Geol. Wilkes U.S. Expl. Exped., p. 709. plate x., fig. 8, 1849. 
3 Sowerby’s Min. Conch. III., p. 107, plate cclx., fig. 5, 1821. 
* Palaeontologia Indica, Series XIII., Salt Range Fossils, Vol IV., p. 126, plate 
iv,, fig. 6 a, b, c, d ; plate v., fig. 1 a, b. 
