288 EMARGINTJLA. 



Genus EMARGINULA, Lamarck. 



[Syst. Anim. sans Vert. 1801, p. 69.] 



Shell more or less conoidal, no septum in the interior; apex 

 not absorbed ; a slit or fissure in front, preceded by an elevated 

 band, which differs in ornamentation from the other radiating 

 longitudinal ribs. 



Type. — Patella fissura, Linnseus. 



Emarginula striatula, Quoy and Gaimard. 



1834. Emarginula striatula, Quoy and Gaimard, Voy. de 1' Astrolabe, Zool.; 



t. iii. p. 332, pi. Ixviii. figs. 21, 22 {non Sowerby). 

 1873. Emarginula striatula, Von Martens, List Moll. N.Z. p. 34. 

 1873. Emarginula striatula, Hutton, Cat. Tert. Moll. N.Z. p. 16. 

 1880. Emarginula striatula, Hiitton, Man. N.Z. Moll. p. 106. 

 1893. Emarginula striatula, Hutton, Linn. Soc. N.S.W., Macleay Mem. j 



Vol. p. 72. 



Shell conical, thin, apex oblique, recurved ; radiating longi- 

 tudinal ribs close together, granulate ; spiral ridges of grovrthj 

 prominent, irregular, producing with the ribs subcancellation ;j 

 margin orenulated ; fissure broad and of medium length. 



Dimensions. — Height ITS mm. ; maximum breadth of base' 

 19 mm.; minimum breadth 15mm. 



Form, and Loc. — Pliocene : New Zealand. 



G. 463. A specimen of the adult, having rather depressed 

 spire ; from Wanganui. Presented hy Lieut.- Col. L. JV. Wibner. 



G. 9593. Two examples, one of the gerontic stage ; Shakespeare 

 Cliff. Sir James Hector Coll. 



Emarginula ■wannonensis, sp. nov. 



[Plate VIII. Figs. (>a-c.'\ 



Shell conical, much elevated, apex oblique, recurved, marginal ; 

 radiating longitudinal ribs in two series, one series being large, 

 standing out well from the surface of the shell and having 



