CRUSTACEA MALACOSTRAC \. 33 



Adensamer, Senna), for the last-named species really refer to the former, though it should be added 

 that we can by no means conclude that the specimens referred by A. Milne-Edwards & Bouvier to 

 J/, bamffica var. tenuimana really belong even to M. tenuimana vSars (see below). 



M. bamffica is known from the Shetlauds and from there along the coasts of Great Britain and 

 Ireland (various authors), on the west coast of France and according to A. Milne-Edwards cc Bouvier 

 it goes further south to Madeira and past Cape Boyador to 25 41' N. L. It is widely distributed in 

 the Mediterranean: the Cyclades (Adensamer), and common in the Adriatic and further west. In North 

 Europe, it has been taken at Bohuslan (Goes), also along the whole west coast of Norway, on the east 

 coast at Yadso in Varanger Fjord (G. O. Sars), in the west part of the Murinau Sea, finally at J3 34' 

 N. E., 1 7 20'E. L. (Birula). 



The species has been found rarely in so shallow water as 13 fm., at England (Bate, teste 

 A. M.-Edw. ec Bouv.) and in the Mediterranean; in the Mediterranean it has been taken several times 

 in 30 to 40 fm., but both to the north and south it is most common in depths between 100 and 300 fm.; 

 the greatest depth I can mention with certainty for it is 691 fm. ("Ingolf"), as it cannot be determined 

 whether the depth 750 fm. from the Gulf of Gascogne (Caullery) applies to this or the following species. 



Remarks 1 . In 1882 Sars gave three species for Norway. Of these M. Roiidelcfii Bell is 

 certainly identical with M. bamffica Penn. (= M. rugosa Fabr.; Sars). Sars states of M. Rondelctii that 

 he has seen "three specimens all of relatively very considerable size"; I have also seen two very large 

 males from Norway which agree well with Sars' descriptions and figures of this "species", but I think 

 nevertheless that the species is only based on characters which are found in very large males or are 

 untrustworthy for other reasons. The eyes are strikingly small, but I cannot say with Sars that the 

 circle of setae at the eye is wanting, as my specimens show at places a row of short bristles which 

 seem to have been torn or broken. The lack of a pair of spines on the 4 th abdominal segment (not 

 3 rd , as Sars states) is too unimportant and also, according to A. Milne-Edwards & Bouvier. not main- 

 tainable as a character even within M. bamffica and the reduced dimension of the eyes seems to me 

 an age-character. My view is also strengthened by the fact that Sars seems to have only 3 very large, 

 but no smaller, specimens of the "species". — M. tenuimana G. O. Sars is on the other hand a well- 

 founded species, and on describing it later the chief differences between it and M. bamffica will be 

 mentioned. It is therefore incorrect of A. Milne-Edwards ec Bouvier — followed by several others — 

 in their various publications to include M. tenuimana Sars as a variety connected with the principal 

 form by transitional stages, and it cannot be determined whether they have seen the real ill. tenuimana 

 or not. The specimen figured by these authors in 1900 (PI. XXIX, fig. 18) must certainly be a true 

 M. bamffica, to judge from the lack of submedian spines on the hind margin of the scutum and the 

 form of this. 



All the specimens from the "Ingolf" are small to almost medium-sized; the largest, from St. 54, 

 is a male 53 mm. long, and there is a female 40 mm. long from the same station which had numerous 

 eggs and a number of newly hatched zoeae attached to the abdominal legs. 



1 Years after I had written the text here I received Dr. Appellors work (in Nov. 1906 . This author rightly main- 

 tains M. tenuimana G. O. S. without having observed its best character however; on the other hand he retains M. r. 

 G. O. S. as distinct from M. iamffica (= M. Rondeletii Belli. Without being able to follow him in this I may refer to his 

 account; I may add that I have thought it best to make no changes whatsoever in my own account. 



The Ingolf-Expedition. III. 2. 5 



