SYNONYMY OF PHERECARDIA LOBATA. 21 
slit-like aperture, bounded ventrally by a knob-shaped 
_ papilla. 
The ventral bristle-fascicle contains: 1°. short hastate 
spines; 2°. rather stout, long bristles with a yellow tip and 
a hook-like bend distal extremity with a number of in- 
distinct denticulations beneath it and dimples over the 
distal part of their shaft (Mal. a. Deh. loc. cit. pl. 53, 
figs. 19 and 20); 3°. capillary bristles, somewhat longer 
than the foregoing, with small denticulations along their 
total length (Mal. a. Deh. loc. cit. pl. 53, fig. 18). In the 
Specimens examined by Potts, those bristles probably were 
lost, for he says: »there is but a single type«, meaning the 
second one; about the variety minuta is stated: »a second 
type, apparently derived by excessive elongation from the 
first, is met with, but rarely«. 
The dorsal setae are of two kinds: 1°. stout, harpoon- 
like bristles with strony serrations having the shape of 
an Y (Mal. a. Deh. loc. cit. pl. 53, fig. 138); 2°. smooth 
bristles, in their basal part about of the same dimension 
as the preceding ones, but with a long, fine distal extre- 
mity, furnished with small serrations like the third kind 
of ventral bristles. 
Leyden Museum, September 1911. 
Notes from the Leyden Museum, Vol. XXXIV, 
