Crangon and Galathea. 



97 



The abdomen is the same breadth as the posterior margin of the carapace, 

 smooth, the transverse Hnes ciliated. 



Length of largest specimens one inch, or 1-2 inch, with outstretched 

 chel£B ; it seldom, however, attains these dimensions. 



Inches. 



Length from tip of chelfe to curvature of abdomen, 0'875 

 Length from rostrum to extremity of telson, . . 0"75 



Length of carapace, 0'375 



Length of abdomen, 0-375 



Length of first pair of chelipeds, 0'75 



Length of propodos of first chelipeds, .... 

 Length of dactylos of do., . . . . •. . 



Breadth of carapace, 



Breadth of propodos of first chelipeds, .... 0*093 



Length of external antennae, 



Length of second pair of chelipeds, 



Inches. 



0-90 



0-75 



0-375 



0-375 



0-7 



0-325 



0-175 



0-225 



0-075 



0-6 



0-45 



With these measurements, which represent average Dalkey specimens, I 

 find specimens obtained at Plymouth and Belfast by myself ; from the west 

 Irish coast, furnished me by Professor Greene and Dr. Wright, and from the 

 north of Scotland, correspond, as well as specimens from Madeira, communi- 

 cated by Professor Bell, and from Algeria by M. Lucas. 



Colour, shades of pale red, banded and blotched with light red and white. 



Habitat, clean bottom everywhere about Dublin, in from five to twenty-five 

 fathoms ; also in lobster and whelk-pots from rocky ground. I have never 

 met it either in the littoral or exposed laminarian zone. Dr. Perceval Wright 

 assures me he met it thus off the south-west coast. 



Habits extremely active ; lives well in the aquarium, where I have had it 

 for months ; it is fond of climbing to the top of the sea-weeds in the tank, and 

 basking there in the sun. 



From the numbers met in the pots, it must be a very roving species. It is 

 far in a way the commonest Galathea met in dredging during my researches 

 on the Dublin coasts: it occurred everywhere, and abundantly, except in black 

 shingly sand, though most abundantly on the oyster-grounds. 



