69 



Epipodites are present on the chelipeds,but not on the other 

 pereiopods. 



Branchial formula : — 



XI. XII. xin, XIV. 





VII. 



VIII. 



IX. 



X. 



Podobranchs. 



ep. 





ep. 



ep 



Arthrobranchs. 









2 



2 



Pleiirobranchs. — — — — 1 1 1 1 



Size. — This is by far the smallest of the British species of 

 Galathea. Adult specimens usually measure from 12 mm. to 20 

 mm. The largest specimen taken by the Helga is an ovigerous 

 female which is 21 mm. long. 



General Distribution. — The species is found in all the seas 

 of western Europe. Norway (Lilljeborg, G. O. Sars), Skagerrak 

 and Kattegat (Meinert), Scotland (Norman, Kinahan, Hender- 

 son) ; North Sea (Hoek), Cornwall (Carrington), English Channel 

 (Crawshay), Bay of Biscay (Bouvier), Spain (Goes), Mediter- 

 ranean (Milne-Edwards), Madeira, Azores (Barrois). 



Irish Distribution. — It is very plentiful all round the coasts 

 and is often taken in very large numbers. A large proportion 

 of the females taken by the Helga are ovigerous, especially 

 those taken in March, April, and May. 



Vertical Distribution.— It extends from the littoral zone down 

 to considerable depths, the Talisman having taken a specimen 

 in 123 fathoms. It occurs in greatest abundance in depths of 

 8-50 fathoms. 



Galathea squamifera. Leach. 



Galathea squamifera, Bell, 1853. 

 Galathea squamifera, Kinahan, 1861. 

 Galathea squamifera, Bonnier, 1888. 



Both upper and lower surfaces of the chelipeds, and the upper 

 surface of the rostrum are densely covered with scaly tubercles. 

 The chelipeds are somewhat flattened, and bear long spines 

 on the inner surface, except on the propodite, where the spines 

 are on the outer margin. 



The basal joint of the antennular peduncle has three sharp 

 spines. 



The ischium of the third maxillipedes is shorter than the 

 merus. On the distal half of the inner margin of the merus 

 there is a row of three or four small teeth, and beyond these, 

 at the distal extremity, a single large spine. 



The endopodites of the third, fourth, and fifth pairs of pleopods 

 of the male are three-jointed. 



The first three pairs of pereiopods have epipodites. 



Size. — It is usually considerably smaller than G. strigosa^ 

 C-60 mm., being a common size for adults. 



