2G0 Dr. W. C. M'Intosh on the 



Order Pycnogonoidea. 



Fam. Pycnogonidae, Latreille. 

 Genus Pycnogonum, Brunnich. 

 Pycnogonum Itttorale, O. F. Miillcr. 

 Abundant under stones between tide-marks. 



Genus Phoxichilidium, M.-Edwards. 



Phoxichilidium femoratum, Rathke. 



Occasionally under stones in rock-pools, and ranging to 

 deerj 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 Cireipedia. 

 Suborder SUCTORIA. 



Fam. Peltogastridae, Claus. 



Genus Peltogaster, H. Ratlike. 



Peltogaster paguri, H. Rathke. 



Occasionally on Pagurus bernhardus. A more elongated 

 form occurs on P. cuanensis. 



Genus Sacculina, Thompson. 



Saccidina carctnt, Thompson. 



Common on the abdomen of Carcinus meenas. Another is 

 found on Portunus holsatus. 



Suborder THORACICA. 



Fam. Lepadidse. 



Genus Lepas, L. 



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



On the bottoms of ships, and thrown ashore after storms 

 attached to timber. 



