330 GASTROPODA. [Pectinibranchia. 



increasing ; sides flatly convex ; base rounded. Suture well im- 

 pressed and distinct. Aperture vertical, subovate, sides nearly parallel, 

 angled above, slightly effuse below. Outer and basal lip simple, sharp. 

 Columella straight and vertical, rounded. Inner Up not broad, with 

 a sharp edge, spreading as a thin layer over the parietal wall. Oper- 

 culum unknown. 



Diameter, 1-4 mm. ; height, 6 mm. (type). Diameter. 1-4 mm. ; 

 height, 4-8 mm. (specimen from Little Barrier, of 8 whorls). 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



Hob. Off Great Barrier Island, in 110 fathoms (type) ; near 

 Little Barrier Island, in 20 fathoms (R. H. Shakespear) ; Lyttelton 

 Harbour (H. S.) ; dredged off Otago Heads (A. Hamilton) ; near 

 Cuvier Island, in 38 fathoms (Captain Bollons). 



Remarks. The specimen I once found in Lyttelton Harbour, and 

 which I took for E. deplexa, Hutton, shows distinct microscopic spiral 

 striations, and has no callus on the umbilical tract. 



3. Pyramidella limbata, Suter, 1908. Plate 16, fig. 9. 



Pyramidella (Eulimella) limbata? Suter, T.N.Z.I., xl, 1907 (1908). 362, 

 pi. 28, f. 5. 



Shell small, subulate, imperforate, polished, with channelled suture. 

 Sculpture consisting simply of straight growth-lines, slightly plicate on 

 some of the whorls. Colour white. Spire subulate, much higher than 

 the aperture ; outlines straight. Protoconch heterostrophe, of 2 smooth 

 whorls, the nucleus lateral. Whorls about 9, regularly increasing, 

 flatly rounded ; base convex. Suture very distinctly channelled. 

 Aperture vertical, suboval, the sides subparallel, the base angularly 

 effuse. Peristome solid, but not thickened, rather sharp. Basal lip 

 expanded. Columella straight, subtruncate below. Inner Up not re- 

 flexed. Operculum unknown. 



Diameter, 1-5 mm. ; height, 5 mm. 



Animal unknown. 



Type in my collection. 



Hob. Bay of Islands (type) ; Takapuna Reef, in sand (H. S.). 



Subgen. 2. SYRNOLA. A. Adams, 1862. 

 Syrnola, A. Ad., P.Z.S., 1862, 233. Type : S. gracillima, A. Ad. 

 Shell small, subulate, polished ; whorls flattened, suture well 

 marked ; columella with a single plication ; outer lip simple. 



KEY TO SPECIES. 



A. Shell smooth, without spiral microscopic striation ; with a 



narrow brown band . . . . . . . . . . pulchra. 



B. Shell with microscopic spiral striation ; not banded. 



a. Suture channelled, columellar fold feeble .. .. tmitiplicata. 



aa. Suture not channelled, but margined below by a smooth 



band ; columellar fold distinct . . lurida. 



