OF NEW SOUTH WALES. 367 



Length, 4 lines; breadth, 1| line. 



Hob. Barnard Islands, No. 3, North-east Australia ; found 

 under blocks of coral. 



27. ElSSOINA TERES. N. SP. 



Shell narrowly elongate, somewhat solid, white ; whorls 7, 

 flattened, finely cancellated, the last obtusely keeled below the 

 centre ; suture fine, spire acuminate, apex acute, aperture semi- 

 ovate, white, slightly callous ; outer lip dilated and thickened, 

 slightly channelled above, moderately sinuated anteriorly. 



Length, 3 1 lines ; breadth, Inline. 



Hob. Mud Bay, Cape York, North Australia, 4 fathoms. Bet 

 Island, Torres Straits, 1 1 fathoms, sandy mud. West side of 

 "Warrior Reef, 8 fathoms, hard mud bottom. Off Katow, New 

 Guinea, 8 fathoms, sandy mud bottom. Specimens not in very 

 good condition. 



28. — KlSSOINA PULCHELLA. 



Shell elongate, solid, whitish, longitudinally finely ribbed, ribs 

 smooth ; interstices transversely minutely lirate, only seen with 

 the lens ; whorls 8, slightly convex ; spire acuminate, apex acute, 

 aperture subovate ; inner lip with thickened callus, outer lip 

 thickened internally, ivory white, expanded and deeply sinuated 

 anteriorly. 



Length, 3| lines ; breadth, \\ line. 



Bab. Barnard Islands, No. 3, North-east Australia , Home 

 Islands, off Cape Grenville. Found on the reefs under coral. 



29. RlSSOINA INERMIS. N. SP. 



Shell elongate, thin, shiny, white, minutely cancellated ; whorls 

 7|, flat, the last roundly convex ; suture distinct, spire acuminate, 

 apex acute, white, smooth ; aperture ovate j inner lip thickened 

 with thin plate of callus, outer lip thickened and expanded, 

 reflected, little sinuated anteriorly. 



Length, 3 lines ; breadth, 1\ line. 



Hob. Darnley Island, Torres Straits, 30 fathoms, sandy 

 bottom. 



