part 3] THE TRIAS OF NEW ZEALAND. 227 



fuse; they then become thinner and diverge again, the space between 

 and in front of them bearing the adductor-scars. Immediately 

 in front of their point of divergence a strong median septum is 

 developed, which extends beyond the dental plates. The dorsal 

 valve has a faint cardinal process with dental sockets on each side, 

 and small, but well-marked, adductor and diductor scars. Ovarian 

 pittings are well marked in both valves. The shell- structure is 

 punctate, and the growth-lines become rather foliaceous towards 

 the anterior margin. 



Length = 23 mm. ; width =40 mm. ; height of area of ventral 

 valves 10 mm. 



Locality and horizon. — It occurs in the Kailiiku Beds at 

 Caroline Cutting, but seems to be scarce. I collected specimens, 

 from which gutta-percha squeezes of the interior and exterior of 

 both valves were made. Prof. Marshall possesses a specimen from 

 the splintery argillites of Mount Pott'J (where it occurs in associa- 

 tion with the Kaihiku fauna), Avhich I recognized as the interior 

 of a ventral valve of this species. 



Ke marks. — This brachiopod is peculiar as to shape, and as to 

 form oF the dental plates and septum, and I am unable to refer it 

 definitely either to ^inriferina or to Cyrtina. The smoothness 

 of its valves and the height of the hinge-area recall in some ways 

 the Ycry abnormal form Cifrfina zittell Bittner from St. Cassian, 

 but in that species the area of the ventral valve is enormously 

 extended. The appearance of the dental plates in the casts at the 

 back of the ventral beak, however, prevents its union with the 

 genus Cijrtina as usually defined. 



Eetzia schwageri Bittner. (PL XXIII, fig. 21.) 



18P0. ' Brachiopoden der Alpineu Trias ' p. 21 & pi. xxxvi, fips. 1-4. 

 1899. 'Himalayan Trias Bracli. & Lamellibranclis ' p. 42 & pi. viii, figs. 1-3; 

 p. 54 & pi. X, figs. 16-20. 



Shell considerably longer than it is wide, beak prominent and 

 pointed, lateral margins gently rounded, anterior margin rounded. 

 The dorsal valve has a median rib, Avhich is rather less proininent 

 than the ribs on each side of it. There are seven rounded lateral 

 ribs on each side of the median one ; the last five of these are 

 distinctly curved outwards, and all of them extend to the beak. 

 The ventral valve has a median furrow no deeper than the next 

 lateral furrows and seven lateral ribs. 



Length =: 14 mm. ; width=ll mm. 



Locality and horizon. — Western slope of Mount Heslington, 

 I^elson, ill the Halohia Beds, where it is rither scarce. I have 

 two or three casts and impressions, from one of which a gutta- 

 percha squeeze of the outsi le of the shell was made. Carnic. 



Bemarks. — This shell resembles the Himalayan JR. sclnraqeri 

 var. asiatica Bittner, but bears rather more numerous lateral ribs. 

 B. schicar/eri is a species of wide vertical distribution, ranging 

 from the Muschelkalk to the Dachsteinkalk in the Alps. In the 

 Himalayas it occurs with HcdohicB of tiie group of H. rugosa. 



