2G0 Dr. W. C. Mcintosh on the 



Order Pycnogonoidea. 



Fam. Pycnogonidae, Latreille. 



Genus Pycnogonum, Briinnich. 



Pycnogonum Itttorale, O. F. Miiller. 



Abundant under stones between tide-marks. 



Genus Phoxichilidium, M. -Edwards. 

 Phoxichilidium femoratum^ Rathke. 



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 Nymjihon Jolinstoni^ 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. Peltogastridae, Glaus. 

 Genus Peltogaster, H. Rathke. 

 Peltogaster paguri^ H. Rathke. 

 Occasionally on Pagurus hernhardus. A more elongated 

 form occurs on P. cuanensis. 



Genus Sacculina, Thompson. 

 Sacculina carcini^ Thompson. 

 Common on the abdomen of Carcinus mcenas. Another is 

 found on Portunus holsatus. 



Suborder THORACICA. 



Fam. LepadidsB. 



Genus Lepas, L. 



Lepas anatifera, L. ; Darwin, Mon. i. p. 73, pi. 1. f. 1. 



On tlie bottoms of ships, and thrown ashore after storms 

 attached to timber. 



