104 Withers. — Ncoscalpcllum in Cretaceous of ICestern Australia. 
Tliere is no direct evidence for the reference of the scutum to 
the same species as the terga, and it shows no sign of decalcification; 
its narrowness suggests such a probahility^ however, even apart from 
the agreement in ornamentation, and the association in the same 
beds of such large valves. This scutum somewdiat resembles the 
elongate scutum lielieved to have come from the Lower Chalk of 
Stoke Ferry, Norfolk, and named by Darwin Vollicipcs acuminatus 
(1851, Monograph Fossil Lepadidae of Great Britain Pal. Soc. 
London, p 56, ]»1. iii, fig 6), although it differs greatly in detail. 
r. acuniiiiaUfs is markedly curved inwards, and the basal margin 
much less convex; the basi-lateral angle is acutely angular instead of 
forming a wide curve, and the valve is much thinner and differs 
greatly in the details of the inner surface. 
Explanation of Plate XI. 
SealpcUum {Ncoscalpellum) glauerti sp. n. 
Mi(l<lle Senonian (Santonian) : near Gingin, W. Australia. 
Fig. 1. 
Scutum (right). Outer view, 
ilus., 4461. 
. One Tree Hill. W. Austr, 
o 
3. 
Inner view of same. 
Tergum (right). Outer view. 
W. Austr. Mus. 4194. 
Hound Hill, Daiidarragan. 
4. 
Inner view of same. 
5. 
Tergum (incoiiqilete right valve). Hound Hill, Daiidarragan. 
Brit. ;Mus. (Nat. Hist.), In. 
25,978. 
6. 
inner view of same. 
All figures x2 
diam. 
Marstipites tcstudinarias 
(v. Schlotheim) . 
iUiddle Senonian (Santonian) : near Gingin, W. Australia. 
Fig. 7. Worn plate x2 diani. Compton’s Chalk. W. Austr. Mus., 
3935. 
8. 
Inner 
view of same showing stereom 
structure. 
9. 
Plate 
(probably liasal). x2 diam. 
One Tree Hill. W. 
Austr 
. Mus.j 3957a. 
10. 
Plate 
(radial), xl.5 diam. Mole 
Cap Hill. W. Austr. 
Mus. 
3939a. 
11. 
Plate 
(probably basal), xl.5 diam. 
Hound Hill, Dandar- 
ragaii. W. Austr. Mus., 4208. 
Printed for tlic Royal Society of Western Australia by it. S. 
Sampson, 971-973 Hay Street, Perth. 
