part 3] THE TRIAS OF J^EW ZEALAND. 185 



and one of them bears five longitudinal parallel cuts. A very sharp 

 and faint rib passes down the bottom of each of the furrows. 



Locality and horizon. — Hector's specimen comes from Oreti 

 railway-cutting (Hokonui Hills), and is probably Noric ; the frag- 

 ment of guard is from the 8piriferina Beds at Eighty-Eight Valley, 

 Nelson, and is probably Carnic. Both specimens belong to the 

 New Zealand Greological Survey Collection. 



Remarks. — The first specimen is contained in a large piece 

 of decomposed felspathic sandstone, and seems to be specifically 

 indeterminable. The fragment of guard agrees well with a 

 similar fragment of Aidacoceras sulcatum Hauer, illustrated by 

 Mojsisovics.i 



The New Zealand Greological Smwe}^ possesses fragments of 

 phragmocones of belemnites of the Atractites grouj) which are of 

 large size ; but most of them seem to be from Jurassic deposits. 



OASTEROPODA. 



Patella (?) jS'Elsoxexsis, sp. nov. (PI. XVIII, figs. 8« & 8 I.) 



Shell patelliform, the apex directed forwards and situated about 

 the anterior third portion of the shell. The shape is not always 

 symmetrical : in one example the apex is slightly inclined to the left, 

 and in another the left anterior position of the shell slopes more 

 steeply than the rest of the surface. The decoration consists of 

 fine rounded ribs, which radiate from just below the apex to the 

 margin. Between the primary ribs three or four smaller ones com- 

 mence at various distances below the apex, but do not attain the 

 strength of the primary ribs. The ribs are crossed by a regular 

 series of faint, close-set, concentric growth-lines, giving the surface 

 a latticed appearance. The shell is fairl}^ thick, and the muscle- 

 scar in the interior is broad, but not very distinct, and in one 

 specimen seems to continue round the inside of the shell, while 

 in another it appears to be interrupted on the left anterior side. 

 The largest specimen that I examined was 71 mm. long, 65 mm. 

 wide, and 36 inm. high. 



Locality and horizo n . — It has only been found in the Kaihiku 

 Beds at Eighty-Eight Valley (Nelson district). Ladino-Carnic. 



The New Zealand Geological Survey possesses several large 

 examples, of which, except in one instance, the interior casts 

 alone have been preserved. Erom this one I made a gutta-percha 

 impression showing the outer surface, which I have taken as the 

 holotype. It has a small mass (apparentl}^ of stroma toporoid coral) 

 attached to its outer side. 



Remarks. — It is possible that this shell may be a Capulid or 

 perhaps a Siphonaria, in which case the apex would be posteriorly 

 directed. The apparent interruption of the muscle-scar on one 

 side rather suggests the latter genus as being the correct one. 



^ Bibliograpliy, 32, pi. xiii, fig, 4. 



