ISOPODA. 335 



Fam. Idotheidae. 



Idothea baltica (Pallas), (I. tricuspidata, R.). C. and gen. dist. (R. I, 79). 

 I* pelagica, Leach. Amongst weeds at 1. w. Cumbrae (R. I, 79) : rocks nr. 



1. w., E. L. Tarbert (S.). 



I. emarginata (Fabr.).- Amongst weeds at 1. w., Cumbrae (R. I, 80). 

 I. linearis (Pennant). In a sandy pool at 1. w., Cumbrae (R, I, 80). 

 Zenobiana prismatica, Risso, (Idotea parallela, R.). Dredged bet. Tan 



Buoy and Hawk's Neb, Bute, 50 f. (R. I, 80). 

 Stenosoma acuminata (Leach\ (Idotea acuminat a, R.). Nr. 1. w., Cumbrae; 



sandy pools, Kilchattan B. (R, I, 81). 



Fam. Astacillidae. 



Astacilla longicornis (Sowerby), (Arcturus longicornis, R.). gen. dist. 



(R. I, 78). 



[A. gracilis (Goodsir). (R. I, 78), is the male of A. longicornis (Sars.)]. 

 Arcturella dilatata, G. 0. Sars. (Leacia dilatata, R.). Off Blackwaterfoot, 



Arran, 20 f. (R. II, 28). 



Fam. Asellidae. 

 Asellus aquaticus (Lin.). C., in fresh-water ponds, canals, &c. (R. I, 77) 



Fam. Janiridae. 



Janira maculosa, Leach. L. w., Portloy, Cumbrae ; mouth of L. Fvne 

 40-60 f. ; off Dunoon 13 f. (R, I, 76) : E. L. Tarbert ; Gampbeltown L., 



&c. (S.). 

 Jaera marina (Fabr.). C. in shall, w., and under stones bet. t. m. 



(R. I, 74). 

 [J. nordmanni (Rathke). (R. I, 75). Sars suggests that the form described 



by Spence Bate under this name may not be the true Rathkian species 



but the male of /. marina]. 



Fam. Munnidae. 



Munna boeckii, Kr. Whiting B. (S.). 



M. kroyeri, Goodsir. Cumbrae, from nests of Lima hians (R. I, 76). 



[M. Whiteana, Sp. Bate. (R. I, 75), is the female of M. kroyeri (Sars).]. 



Paramunna bilobata, G. 0. Sars.F. of Clyde (A. M.N.) : E. L. Tarbert ; 

 Kilbrennan Sd., &c. (S.). 



[Leptaspidia brevipes (Sp. Bate). Off Cumbrae (R. I, 76). Norman 

 suggests this is a Pleurogoniumj. 



Pleurogonium rubicundum, G. 0. Sars. F. of Clyde (A. M. N.). At mouth 

 of estuary 64 f. Dec. 7th, 1899 (F. S. G.). 



P. inerme, G. 0. Sars. Off Farland Pt., Cumbrae, 23 f. (R. II, 29) : Kil- 

 brennan Sd. ; Campbeltown L. (S.). 



P. spinosissimum, G. 0. Sars. Off Farland Pt., Cumbrae (R. II, 29). 



Fam. Munnopsidae. 

 Eurycope phallangmm, G. 0. Sars. L. Fyne, r., 30-40 f. (S.). 



Fam. Oniscidae. 



Ligia oceanica (Lin.). Under stones, &c. ; more or less c. in various places. 

 (Note : This and the following eight species are land Isopods, and may 

 be found under stones, old wood, &c.) 



Fam. Trichoniscidae. 



Trichoniscus pusillus, Brandt. Cumbrae (R. I, 86) : Rothesay, nr. Aquarium 



(S.). Prob. not unc. if carefully sought for. 

 T. roseus, Koch. E. Tarbert (S.) 



