400 CRUSTACEA. 



ORDER L^MODIPODA. 



Gemis Caprella. 

 C. Phasma, Latr. 

 South of Ireland, J. V. Tliompson. 



C. linearis, Latr. 

 Found among marine plants collected near Glenann by Dr. Drum- 

 mond, in May, 1836, and subsequently obtained in abundance by Mr. 

 Hyndman and myself upon Plumularice, &c., dredged in Strangford 

 Lough. 



C. lohata, Miill., Kroyer. 



Specimens attached to zoophytes {SertularifB chiefly) dredged from 

 about ten fathoms on sand near Portaferry, Strangford Lough, Oct., 1839, 

 Mr. Hyndman and W. T. 



C. tuherculiita, Goodsir. 



Specimens taken with the last. 



Guerin, in his Iconographie, &c., pi. 28, f. 1, represents a species 

 which he calls by this name ; it is from the Mauritius (Texte Descrip. 

 Crust., p. 24). 



C. acuminifera, Leach. 

 I found a few examples of this species living among Corallina officinalis 

 in shallow rock-pools between tide-marks at Springvale, Co. Down, in 

 July, 1846. 



Genus Proto. 

 P. pedatum, Leach. 

 North of Ireland, W. T. 



Gejius .^GINA. 

 JE. f hngispina, Kroyer. 

 A single individual of this very fine, large, and spinous form was taken 

 with the two first-noticed Caprellte. My specimen differs only from that 

 represented by Kroyer in having one or two more spines retrally on the 

 body : it is wholly red like his, and has retained this colour in spirits to 

 the present time. Goodsir's Caprella spinosa (Edin. New Phil. Journ., 

 vol. xxxiii. p. 187, pi. 3, f. 1) approaches very near to this species, if it be 

 not the same : it is described as having " the whole body of a pale white 

 colour." Caprella linearis of authors (already recorded as Irish) was 

 taken with this as well as C- lobata and C. tuherculata. 



ORDER ISOPODA. 



Genus Arcturus. 



A. longicornis, Westwood. 

 North and East of Ireland. 



