SUTER : ON TEETIAKY SHELLS FROM NEW ZEALAND. 209 



ExiLiA Dalli, n.sp. PI. XVIII, Figs. 4, 5. 



Shell slender, fusiform, lougitudiually costate and spirally striate, 

 with a narrow aperture and long, straight canal. The sculpture 

 consists of longitudinal, close, oblique, and slightly flexuons ribs, 

 about 20 on the penultimate whorl ; they are rounded and of the 

 same width as the interstices. Spiral sculpture formed by close- set 

 narrow grooves, extending over the ribs, and absent over a short 

 space below the suture from the eighth whorl downwards. Spire 

 subulate, higher than the aperture. Protoconch small, formed by 

 two smooth, shining, and rounded whorls. Whorls 10 on the 

 immatui-e specimen before me, flatly convex, regularly increasing in 

 size, the body-whorl very little expanded, prolonged into a straight 

 and long canal. The lower part of this is broken off. Suture 

 impressed, distinct. Aperture narrow, pyriform. Outer lip, which 

 is broken off, no doubt slightly flexuous. Columella with a slight 

 elevation in the middle, two inconspicuous and slender plaits juts 

 below the suture, which may easily be overlooked. The inner lip 

 spreading as a thin narrow glaze over the pillar. Height about 20, 

 breadth 5 mm. 



Localiti/. — White Rock, Pareora River, Canterbury, New Zealand 

 (Professor J. Park). 



Formation. — Labelled " Oamaru Series, Oligocene." Miocene 

 (J. Park, 1905). 



Type in my collection. Dr. W. H. Dall's comment on this species 

 is: "Immature shell, related to, if not identical with, my Plicifusus. 

 We have a recent species, P. redirostris, Carpenter, very much like 

 this, though larger ; we have in our Eocene a number of species very 

 similar to your fossil, and for them Conrad proposed the genus Exilia 

 (which does not have plaits on the pillar, as stated by Cossmann). 

 It is quite possible that the name should be retained, as there are some 

 characters which seem to divide the Eocene and Oligocene forms from 

 our similar, but always larger and coarser, Plicifusus of the recent 

 fauna." 



As stated in the diagnosis, my specimen has two columellar plaits. 

 However, I must confess that 1 might not have seen them if I had 

 not especially looked for them in consequence of Cossmann's statement.^ 



I have much pleasure in uniting Dr. W. H. Dall's name with the 

 species as a mark of my deep-felt gratitude for the very liberal and 

 always most valuable help he has accorded me in my conchological 

 studies. Those who have access to large collections and extensive 

 libraries have no idea what such kind help means to a worker in jN^ew 

 Zealand, where a scientist has not these facilities. 



Cardium (Trachycardium) Waitakiense, n.sp. PL XVIII, Fig. 6. 



There being only the central part of a right valve in my possession, 

 the description mu^t, for the present, remain fragmentary. 



Shell solid, ventricose, radiately very finely ribbed ; the ribs number 



Efisais de I'aleocouchologie Compaiee, livr. iv (1901), p. 26. 



