206 DRILLTA. 



chestnut at the apex and on the lower part of the body-whorl, a 

 row of chestnut dots between the nodules of the periphery. 

 Length, 16 mill. 



Andaman Islands. 



D. TRAILLI, Button. PL 34, fig. 90 ; PL 12, fig. 37. 



Spire acute, with broad, shallow, spiral grooves, and promi- 

 nent transverse ribs on the central and anterior portions of the 

 whorls ; posterior margin, near the suture flat ; aperture oval, 

 canal short ; yellowish brown or chestnut-color ; body-whorl 

 shorter than the spire. Length, 1-1 inches. 



Stewart Island, N. Zealand, 24 fms. (Button) ; 



New South Walts (Angas). 



Figured from a specimen sent to me by Prof. Button. Z). 

 semula, Angas (PL 12, fig. 37), is identical. 



D. LAUTA, Pease. PL 12, fig. 31. 



Periphery nodose, nodules rather prominent, longitudinally 

 disposed, surface concave above ; canal short, open ; sinus broad 

 and deep ; yellowish chestnut, with a white band on the periphery 

 and a red chestnut line running on the middle of it, one or two 

 narrow white bands below on the body-whorl, each indistinctly 

 narrowly bordered with red chestnut on either side. 



Length, 9 mill. 



Viti and Paumotus Is. 



D. EXILIS, Pease. PL 15, fig 25 ; PL 12, fig. 32. 



Whorls nearly plane, longitudinally plicately ribbed, the ribs 

 small and close, descending from the sutures; aperture very 

 short ; canal short and open ; reddish chestnut, the ribs whitish, 

 with a dark band below the middle of the body-whorl. 



Length, 5*5 mill. 



Viti, Cook's and Paumotus Isles. 



D. pusilla, Garrett (PL 12, fig. 32), is a synonym. 



D. PYGM^EA, Dunker. PL 34, fig. 89. 



Shell stouter, the spire shorter, more convex and obtuse than 

 in the preceding species, the whorls not constricted above ; 

 sculpture and coloring same as in D. e.r///.s. 



Viti Iddmlx. 



Although remarkabl}' similar to D. exilis, the form will, on 

 comparison, readily tUstinguisli it. 





