274 DR. C. T. TRECHMA1SN O^ THE [vol. lxxix, 



in a gritty felspathic conglomerate. The beak projects well above 

 the hinge-line, and is anteriorly situated. The hinge-line is 

 straight, produced, and pointed behind. The anterior and lower 

 posterior margins consist of one almost semicircular curve. The 

 shell is somewhat produced behind ; the valve is well swollen, but 

 flattens out posteriorly. The primary ribs commence at the beak ; 

 about twelve ribs are visible, round the margin, each alternate 

 one of which seems to begin about half-way from the beak. 



Dimensions. — Length = 15 mm. : height = 13 mm. 



Locality. — ' Trigonia'' Beds, slopes of the South Peak, Ben- 

 more (Hokonui Hills), in beds said to be of Bhsetic age. Collected 

 by A. McKay in 1878. 



Remarks. — Having only a single left valve, I cannot be certain 

 as to the species of this shell; but it is strongly reminiscent of 

 some specimens of the familiar Pteria contorta. The ribs are 

 not quite so numerous as in most examples, and the shell is not 

 so narrow : that is, the posterior margin does not appear to follow 

 the semicircular outline of the anterior and lower margin, as it 

 does in typical specimens of Pt. contorta. 



However, it seems to belong to that group, and the occurrence 

 of a series of beds with Pt. contorta in New Zealand is not 

 improbable, since they have been traced in Upper Burma. The 

 specimen now described is not unlike an internal cast of a left 

 valve figured from that district. 1 



Inoceramtjs cf. guxoi G-. Bcehm. (PI. XV, figs. 1 & 2.) 



1907. ' Die Siidkusten der Sula-Inseln Taliabu & Mangoli ' p. 68 & pi. ix, 

 figs. 10-14, pi. x, figs. 1 a-1 c,2. 



Description. — Shell subtriangular in outline, elongate, 

 tapering gradually ; the beaks are very anterior, sharp, pointed, 

 and produced. The hinge-line is very gently curved, and seems to 

 have occupied rather more than a third of the length of the shell. 

 The posterior margin of the shell is gently curved, the lower or 

 hinder margin rounded and nearly semicircular, the anterior 

 margin below the beak straight or slightly concave. In the 

 neighbourhood of the beaks the shell is somewhat arched and 

 swollen, but flattens out towards the hinder margin. The hinge- 

 margin makes an angle of about 40° with the anterior margin. 

 In my specimens neither the test nor the ligament-pits are well 

 seen. 



Dimensions. — Length from beak to lower margin = about 

 100 mm. ; greatest width = about 49 mm. 



Locality. — Totara Point, Kawhia, where the shells are rather 

 common in the fine-grained glauconitic sandstones. Prof. Marshall 

 sends me a .specimen from Kerrs, south-west of Nugget Point, in 

 the south-east of the South Island, in a similar matrix. 



Remarks. — The Inocerami at Totara Point differ from the 



1 Maud Healey, 'Faixna of the Napeng Beds ' Pal. Ind. vol. ii, No. 4 (1908) 

 pi. v, fig. 8. 



