Occurrence. I have hithertho only met with this form in 2 localities of 

 the Norwegian coast, viz., Bratholmen and Skjerjehavn, the former situated at 

 some distance south of Bergen, the latter at the mouth of the- Sogne Fjord. In 

 both these localities it occurred occasionally close to the shore, together with 

 A. longiremis, from which it was at once distinguished by its darker blue colour. 



Distribution. The Baltic (Giesbrecht), Scottish coast (Scott), coast of 

 France (Canu). 



21 Crustacea. 



