194 Transactions. 
characteristic shape, with its peculiar expansion in tont] of the small . 
deep lunule, that there can be no doubt that it is a Lucinida. Hutton 
classified the specimen under Cyclina because he mistook the anterior. 
expansion for the lunule, and saw no line circumscribing it, while Suters. 
identifieation of it as Dosinia subrosea must have been based on a ven 
perfunctory examination. The sculpture consists of fairly regular, s if 
low, concentric ae more irregular distally, thus agreeing well 
that of L. oliata 
Type locality, Hautapu Falls, Upper Rangitikei. 
Myllita finlayi n. sp. (Plate 16, figs. 6, 7, 8.) 
Shell very small, eret d in ошар, little inflated ; beaks media 
inconspicuous ; sculpture f very fine curved divaricate ribs, about 4 p 
metre, with their diei edges piii and somewhat roughened 
AQ aee pee weak concentric growth-lines; hinge—right valve 
bifurcate cardinal under umbo and several minute tubercles | 
Su 
Height, 5mm.; length, 5mm.; thickness (one valve), 1:25 mm. - 
Locality —1102, sandy beds in idus clays below limestone, Магаека 
Creek, om miles above m 
Remarks.—The generic location under Myllita is only proven | 
outline and ribbing are not the same as in that gen , but the who! 
eem ae be revised later. A closely related, miden: араай occurs at 
astlecli 
Cerithidea perplexa (Marshall and Murdoch). 
1919. rerit vid perplexum gps and Murdoch, Trans. N.Z. 1 
vol. 54, p. 254, pl. 20, figs. 5 
This shell is very closely related to a Recent Cerithidea 6 
(Gray) ; indeed, it may not be worth specific recognition, as in the Е 
cannot be made out. The two basal keels of C. bicarinata are represented 
in C. perplexa, as may be seen in Marshall and Murdoch's figure, but € y 
in dis be Losada omes they are obsolete. The whorls of the f 
are inclined to ter and the size somewhat larger than the Kece 
species, so perhaps it que be as well to retain both names. The gener 
position is under Cerithidea rather than Ataxocerithium, for the can 
very short and straight. 5 
арти семени р. sP- FE js fig. 9.) 
