Webster. — Results of Dredging. 305 



Plate XXVI. 



£!§• f^ 1 M inolia textilis, M. and S. 4-3 mm. by 3 '8 mm. Murdoch del. 

 Fig. 4b. | 



Fig. 47.) 



Fig. 48. \ „ plicatula, M. and S. 4-5 mm. by 3 mm. Murdoch del. 



Fig. 49.) 



Plate XXVII. 



Fig. 50. ) Cirsonella granum, M. and S. 1 75 mm. by 1 "75 mm. Murdoch 



Fig. 51.; del. 



Fig. 52. C4enus (?). Dorsal surface. 77 mm. by 4 -6 mm. Murdoch del. 



Fig. 53. ,, Ventral surface. Murdoch del. 



Fig. 54. ,. Nucleus, greatly magnified. Murdoch del. 



Fig. 55. \. ? . Re i uzia gp 3-8 mm. by 3 3 mm. Murdoch del. 

 Fig. 56. ) v ' J 



Art. XXXV.— Results of Dredging on the Continental Shelf of 



Neiv Zealand. 



By W. H. Webster, B.A. 

 [Read before the Auckland Institute, Cyth December, 1905.] 

 Plate XXXVIII. 

 Mangilia murrhea ( = fluor-spar), n. sp. Figs. 1, la. 



Shell semitransparent, white. Whorls 4|, including a smooth 

 protoconch of one and a quarter whorls. Sculpture : Longi- 

 tudinal ribs, stronger on the earlier whorls, weaker towards the 

 last, which has about fifteen ribs extending to the suture ; these 

 ribs are crossed by faint spirals, the posterior or peripheral being 

 the strongest, two on the second whorl, three above the aperture, 

 a fourth on the body-whorl, beyond which the longitudinal 

 ribs only persist a short distance. The whorls are tabulated 

 above the periphery ; a 1 in. objective shows many subsidiary 

 spiral striations between the main spirals. Suture well marked 

 by a narrow overlapping of each whorl by the one following. 

 The base has fifteen spiral striae. Aperture with a conspicuous 

 sinus in the infrasutural tabulation, but there is no anal fasciole. 

 The type is waterworn. Length, 5 mm. ; breadth, 3 mm. 

 " Allied to M. flexicostata, Suter (H. S.)." 



Mangilia infanda ( = disreputable), n. sp. Fig. 2. 



Shell white, chalky. Whorls 5, rounded, including a smooth 

 protoconch of about one whorl and a half. Sculpture : Longi- 

 tudinally vertically ribbed, the ribs strong right up to the 

 suture and persisting faintly down the base ; body-whorl with 

 about nine ribs. Strong spirals cross the ribs, two on the second 



