Fintay.—New Shells from New Zealand Tertiary Beds. 475 
Macoma rather than in Tellina. It differs, however, from the Recent 
species in its finely ridged zipper less inflation and elongation, and 
unstraightened basal margin. It has also some resemblance to the Aus- 
tralian T. albinelloides Tate. 
Genus ATAXOCERITHIUM. 
Ataxocerithium pyramidale n. sp. (Plate 51, figs. 7a, 7b, 7c.) 
Shell small, regularly conical, with nodulous cancellate sculpture and 
sharply angled periphery. Protoconch of about 3 smooth but apparently 
worn conical whorls (nucleus lost), marked of “Жы Dioki stage by a 
slight varix; the following 1} whorls have only gradually mmn: 
concave axial riblets, about their own width apart; from this p iral 
sculpture begins and rapidly gains prominence. Three main ord к all 
a very faint rib diio ‘admin me below suture. Just below T on 
apart from protoconch, about 6, regularly increasing, , body - whorl 
sharply angled at Psi iow base flattish. ture éanalicula 
subrhomboidal, interrupted below by a narrow small canal, bent backwards 
and strongly to left. Outer lip broken. Columella vertical with strong 
old ei reda canal and weaker subparallel one a short distance above it. 
iine lip highly callous, spreading over parietal wall and a short distance 
beyond columella, "hori dde 
Height, 6: ; diameter, 4 mm 
rh and savers paratypes, from Target Gully (Awamoan), in author's 
coll Also occurs at Ardgowan ; euri; Awamoa Beach; Clifden, 
Southland (band 6c—Ototaran ?) ; and Pourakino, Riverton. 
Subspecies robustum n. subsp. 
Differs in its ipe wider spire (angle' about 45°) and less cancellate 
appearance, due to weaker spirals but stronger axials. These are slightly 
blunter and fewer fiae 18 on к. эо), so that interstices are wider. 
Otherwise there is no difference 
cen erp 7 mm. ; width, 4-5 m 
e (upper whorls lost and aries d eh from Taradale 
Bue (Hawke s Bay—Pliocene), in the author’s collectio 
Ataxocerithium nodicingulatum n. sp. (Plate 51, figs. 8a, 8b, 8c, 8d.) 
Shell moderately small, irregularly conical, with nodulous cancellate 
sculpture and rounded periphery. (зайти obliterated in most speci- 
mens, of a few conoidal turns, several whorls follow, ornamented only with 
flexuous axial ribs. At initiation of cancellate "Eu pee are 2 bold spirals, 
quickly increasing by intercalation on later whorls to 3, 4, and up to 9 o 
