XXI. 
SUB-ORDER SCUTIBRANCHIATA. 
A. RHIPHIDOGLOSSA. 
Neritide. 
Neritina, Lam., 1809. 
Turbinide. 
Phasianella, Lam., 1808. 
(type P. bulimoides, Lam.) 
P. pulla, L. 
We lack the courage to replace this well-known name by Lutropia, 
Humphrey, 1797. 
Trochide. 
We have followed, in general, Mr. Pilsbry in this group. It will be seen 
that the old name of Trochus has vanished from the list, as the genus is 
restricted to certain tropical shells. We have thought it of service to 
give a full list of our species. 
Monodonta, Lam., 1801. 
(type M. labio, Z.) 
M. lineata, Da Costa. 
Gibbula, isso, 1826. 
(type) G. magus, L. 
G. cineraria, L. 
G. obliquata, Gimel ( = G. umbili- 
eata, Mont.) 
G. tumida, Mont. 
Cireulus, Jeff., 1865. 
(type) C. striatus, Phil. ( = Duminyi, 
Tieq.) 
