38 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



Millport Bay, in 7 fathoms, muddy sand; and at 

 Lochranza, in 2 to 5 fathoms, bottom black sandy 

 mud much mixed up with small triturated vegetable 

 matter. It has also been taken between tide-marks 

 at Lerwick, Shetland, by the Rev. A. M. Norman and 

 Dr. Jeffreys. 



DEXAMINE THEA, A. Boeck. 



Dexamine Thea, A. Boeck, Forh. ved. de Skand. 

 Naturf., 8de mode (1860), p. 658. 



Habitat. — Dredged off Hunterston, opposite Mill- 

 port, in 12 fathoms, bottom sandy gravel and sea- 

 weed, and taken in the surface-net after sunset. 

 The one taken in the dredge is a female in ova, 

 and much larger than the one taken by the surface- 

 net. 



Genus Atyltjs, Leach. 



atylus gibbosus, Spence Bate. 



Atylus gibbosus, Spence Bate, Cat. Amph. Crust. 

 Brit. Mus. (1862), p. 137, pi. xxvi., fig. 3. 



Lampva gibbosa, A. Boeck, Crust. Amph. Bor. et 

 Arct. (1870), p. 108. 



Tritacta gibbosa, A. Boeck, De Skand. og Arkt. 

 Amph. (1876), p. 318, pi. xii., fig. 2. 



Habitat — Taken frequently by the dip-net among 

 the fronds of sea-weed, such as clumps of Halidvys 

 siliquosa, Desmarestia aculeata, and the flaccid masses 

 of Ectocarpus, along the borders of low-water. In 

 the latter instances the young are sometimes plenti- 

 ful, the fibrous, bushy tufts affording good shelter 

 from their many enemies. The colour of this species 

 appears to be more or less variable, and to depend 

 in some degree on the plant it frequents. On an 

 old plant of Desmarestia aculeata, dredged up from 

 8 fathoms, gravelly bottom, six were taken, all 

 of a dark brown colour. On this occasion live 

 wanted the antennae ; others taken on Ectocarpus, 

 in shallow water, were lighter brown. 



