CRUSTACEA. 
135 
% 
Order Pycnogonoidea. 
Fam. Pycnogonidse, Latreille. 
Genus Pycnogonum, Briinnich. 
Pycnogonum littorale , 0. F. Muller. 
Abundant under stones between tide-marks. 
Genus Phoxichilidium, M.-Edwards. 
Phoxichilidium femoratum , Ratlike. 
Occasionally under stones in rock-pools, and ranging to 
deep water. 
Besides the foregoing, there are several species (one appar¬ 
ently identical with Mr. Goodsir’s Nymphon Johnstoni , and 
another with his N. spinosum) not uncommon in the coralline 
region. Many delicate zoophytes are found on their limbs. 
Order Cirripedia. 
Suborder SUCTORIA. 
Fam. Peltogastridse, Claus. 
Genus Peltogaster, H. Rathke. 
Peltogaster paguri , H. Rathke. 
Occasionally on Pagurus bernJiardus. A more elongated 
form occurs on P. cuanensis. 
Genus Sacculina, Thompson. 
Sacculina care ini, Thompson. 
[Plate IX. fig. 13.] 
Common on the abdomen of Carcinus mamas. Another is 
found on Portunus holsatu-s (Plate IX. figs. 14 & 15). 
