215. 
216. 
. 230. 
\231. 
51 
GENUS HYDROCENA. Parreyss. 
Hydrocena parvula. Mousson. Upolu 
Isl., Navigator’s Isls. 
Hydrocena solidula. Pfeifer. Lord 
Hood’s Isl. 
GENUS OMPHALOTROPIS. Pfeiffer. 
. Omphalotropis acutilirata. Pfeiffer. 
New Hebrides Isls. 
. Omphalotropis annatonensis. Pfeifer. 
New Hebrides Isls. 
. Omphalotropis bifilabris. Mousson. 
Upolu Isl., Navigator’s Isls. 
. Omphalotropis bilirata. Mousson. Upolu 
Isl., Navigator’s Isls. 
. Omphalotropis bulimoides. Jacq. San 
Christoval Isl., Solomon Isls. 
. Omphalotropis cerea. Pfeffer. Nor- 
folk Isl. 
. Omphalotropis conoidea. Mousson. 
Upolu Isl., Navigator’s Isls. 
. Omphalotropis exquisita. Pfeiffer. 
Lord Howe’s Isl. 
. Omphalotropis granum. Pfeiffer. 
Isle of Pines. 
. Omphalotropis navigatorum. Pferfer. 
Navigator’s Isls. 
. Omphalotropis ovata. DMousson, Fiji 
Isls. 
. Omphalotropis parva. ousson Fiji 
Isls. 
. Omphalotropis perforato. Mousson. Navi- 
tor’s Isls. 
Omphalotropis rosea. Gould. Fiji Isls. 
Omphalotropis vallata. Gould. Vavau 
Isl., Friendly Isls. 
