CRUSTACEA MALACOSTRACA. III. 



J 3 



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 Sars. 



Occurrence. Taken by the "In golf 1 at four places. 



West Greenland: Sukkertoppen, Lat. 65°25' N., among algfe at the beach; 9 spec. 

 — Godthaab, Lat. 64°n' N.; 1 spec. 



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



Faeroes: Trangisvaag; 2 spec. 



This species has been taken at West Greenland from Lat. 6o,°i4' N. to Lat. 6i°5o,' N. at God- 

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

 locality O. Fabricius wrote: "habitat sine numero ad littora inter fucos iapidesque," 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 0fjord (by Dr. A. C. Johanseu), on the east side in Beru Fjord (by Dr. 

 A. C. Johanseu), and at Djupivogr (by cand. mag. H. Jonsson), finally south of Iceland at Vestman-0erne 

 (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. I. albifrons 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 

 Europe to Long. 55 E. (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 (Carus) seems to me to be extremely doubtful. Finally taken at the east coast of 

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



Ianira Leach. 



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

 onym. Iolella Richardson with its synonyms Ianthe Bovallius and Tole — a misprint for Iolc — cannot 

 be separated from Ianira in any natural way; Iolanthc (Tole) libbyi Ox\.m. is only a synonym lor Ianira 

 (Henopomns) tricornis Kr., and the other species referred to lolanthe differ from the typical forms of 

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

 abdomen. Furthermore Rhacura Rich, and Ia>rclla Rich, may perhaps be cancelled as genera, and their 

 forms referred to Ianira, as I have been unable to find any generic difference worth mentioning between 

 Ianira 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. 



Ianira, 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 



