186 Papers from the Marine Biological Laboratory at Tortugas. 
Dimensions of living specimen, in millimeters: Length 6; length of head 
and neck 0.84; diameter of head 0.56, of neck 0.21; length of bulbs 0.42; 
distance from base of neck to first distinct segment 0.14; first segment, 
length 0.21, breadth 0.08; second segment, length 0.42, breadth 0.08; third 
segment, length 0.84, breadth 0.11; fourth segment, length 1.54, breadth 
0.35, variable; ova 0.034 by 0.022, and 0.039 by 0.020 in the two principal 
diameters. 
The proboscides were but slightly everted, but the hooks, so far as 
seen, agree with this species. Length of hooks about 0.04. 
