208 DE. C. T. TEECHMA^X OX [vol. Ixxiii^ 



AXODOXTOPHOEA AXGULATA, Sp. nOV. (PI. XXI, fig. 10.) 



Shell thin, elongated ; the beaks anterior or terminal, projecting 

 considerably above the hinge-area, strongly directed forwards, 

 tapering and rolled, enclosing a deep false kmular depression 

 beneath them, divided by the sharp margin of the valves. The 

 anterior margin below the beak is well romided, the lower margin 

 very gently romided, and the posterior lower margin rather angu- 

 lated. The upper posterior margin is bluntly angular. A rather 

 prominent angular ridge merging gradually into the surface of the 

 shell passes from behind the beak to the lower posterior margin, 

 causing the valves to be somewhat inflated. G-rowth-lines are 

 fine and closely set, but rather irregular ; otherwise the surface is- 

 smooth. Length = 31 mm. ; height = 20 mm. ; thickness of both 

 valves = 17 mm. 



Locality and horizon. — Bed c, Otamita, Hokonui Hills, 

 where I collected several specimens, both as casts and with tlie 

 shell preserved. Carnic. 



Remarks. — This form is easily recognized by its elongate shape, 

 nearly terminal beaks, and the strong ridge on the posterior 

 portion of the valves. 



AXODOXTOPHOEA OVALIS, Sp. UOV. (PL XXI, fig. 9.) 



Shell very thin ; beaks rather anteriorly situated, rounded, broad, 

 low, anteriorly directed and rolled, enclosing beneath them a deep^ 

 false, lunular depression. The anterior margin below the beaks is 

 well rounded and rather produced ; tlie posterior margin is broadh' 

 rounded. The valves are not inflated; the surface is gently rounded,. 

 and shows no ridge in the posterior portion. 



The surface of the shell is fairly smooth with fine, but rather 

 iiTegular, raised growth-lines, which become more strongly developed 

 towards the margin. Length = 3-5 mm. : height = 2-5 mm. : thick- 

 ness = 15 mm. 



Locality and horizon. — Bed c, Otamita, Hokonui Hills. 

 Carnic. I collected three specimens with the shell wholly or 

 partly preserved. 



Remarks. — This species resembles rather closely Anodonto- 

 fliora grieshachi Bittner,^ which occurs in the Tropites Beds of 

 the Bambanag and Shal-Shal sections of the Himalayan Upper 

 Trias ; but in the Xew Zealand shell the beak seems wider, 

 blunter, and more anteriorly situated, and the growth-lines are- 

 coarser and less regular. 



AxoDOXTOPHOEA ed:\ioxdiifoemis, sp. nov. (PI. XXI, fig. 8.) 



The shell is fairly thick, but seems to have been thinner in the 

 umbonal region. The beak is rather anteriorly situated, broad 

 and blunt, anteriorly directed and inrolled, enclosing a small 

 lunular depression. The margin is well rounded in front, slightly 



^ Bibliography, 5, p. GO & pi. viii. figs. 14-16. 



