CRI'STACI-A MALACOSTRACA. III. 13 



cimens from our northern dependencies all belong to the typical form shown in figs, i and 3 in my 

 paper quoted and, besides, drawn by San. 



currence. Taken by the "IngolF at four places. 

 \\Yst r.ncnl.inil: Sukkertoppen, Lat 65as' N., among algae at the beach; 9 spec. 



Godthaab, Lat64ii'N.; i spec. 



North-West Iceland: Isafjord, shallow water; many spec. 

 Feroes: Trangisvaag; 2 spec 



This species has been taken at West Greenland from Lat. O9i4' N. to Lat 6i59' N. at God- 

 havn. Claushavn, Holstensborg, Sukkertoppen, Godthaab, Fiskenxs and Frederikshaab. As to the last 

 locality O. Fabricius wrote: "habitat sine numero ad littora inter fucos lapidesque," and it has been 

 recorded as going down to 15 fathoms (H. J. Hansen). At Iceland it has been taken at the western 

 coast far north in Adelvik (by Mag. W. Lundbeck) and far south at Reykjavik (various collectors), on 

 the northern side at Akureyri in Ofjord (by Dr. A. C. Johansen), on the east side in Bern Fjord (by Dr. 

 A. C Johansen), and at Djupivogr (by cand. mag. H. Jonsson), finally south of Iceland at Vestman-Oerne 

 (by cand. mag. Saemundsen); it was always taken in shallow water or at the beach. At the Faeroes it 

 has also been taken at Thorshavn on the pier. 



Distribution. /. albi/rons is common at Denmark (Meinert), and occurs everywhere in the 

 Baltic, even to the end of the Gulf of Bothnia (test. Apstein). It occurs along the whole coast of 

 Norway, even to Vadso (G. O. Sars), and is stated to go further eastwards along the northern coast of 

 Kurope to Long. 55 R (Apstein). It is distributed at Great Britain and Ireland, at the northern coasts 

 of Holland, Belgium and France (various authors), and at the coast of la Vendee (Bonnier), but whether 

 it occurs more southwards along the western coasts of Europe seems to be unknown; its existence at 

 Naples in Italy (Cants) seems to me to be extremely doubtful. Finally taken at the east coast of 

 th America from about Lat 41 N. to 45 N. and at Labrador (Harger). 



lanira Leach. 



This genus has not been well understood by most authors. Henopomus Kr. is merely a syn- 

 onym, lolflln Richardson with its synonyms lanthc Bovallius and Tole a misprint for loir cannot 

 be separated from lanira in any natural way ; lolanthf f Tole) libbyi Ortm. is only a synonym for lanira 

 llfnopomus) tricornis Kr., and the other species referred to lolanthc differ from the typical forms of 

 lanira only in the degree of the development of the lateral expansions of the thoracic segments and 

 abdomen. Furthermore Rhacura Rich, and Itrrclla Rich, may perhaps be cancelled as genera, and their 

 forms referred to lanira. as I have been unable to find any generic difference worth mentioning between 

 lanira and those two genera in the descriptions and figures published by Harriet Richardson; I am 

 unable to ascribe generic value to characters derived only from the number and size of lateral pro- 

 cesses and dorsal tubercles, when no other character can be found in the descriptions. 



lanira, as interpreted here, is a most natural genus, well distinguished from other allied genera 

 by a set of characters. The molar process of the mandibles is strong, subcylindrical or a little broader 



