CRUSTACEA MALACO.STRACA. 



57 



Occurrence. The "Ingolf has only met with this common species at a single station. 



Baffin Bay: St. 33: 67° 57' N. L., 55° 30' W. L., 35 fm., temp. o-8°; 18 spec. 



In Malac. Groenl. I have mentioned numerous localities; the furthest north the .species has 

 been taken was at Grinnell Land at 79° 29' N. L. (Miers), and along the west coast of Greenland it 

 goes from Port Foulke (Stimpson) to 6i°5o'N. L.; of the bathymetric distribution I wrote: "This 

 species is found generalh' in shallow water from ca. 4 fm. and out to 40 fm., but it has also been 

 taken many times at a considerable depth, between 100 and 175 fm.; the observations from 240 and 

 250 fm. require further confirmation". Later finds, even those of Ortmann and Ohlin from the same 

 region, have added nothing new worth mentioning to my earlier statements. 



On the east side of Greenland the species has been taken at Angmagsalik (ca. 6572° N. L.), 

 9—0 fm., in the eel-seine, half a score of specimens (Amdrup Exp.), also a number of times by Swedish 

 expeditions on the tract from 70° 27' N. L. to 74° 35' N. L., in depths from 672—9 fm- and down to 

 132 fm. (Ohlin). At Jan Mayeu, from which Koelbel had already noted it, two specimens were taken 

 at 55 fm. (2"'^ Amdrup Exp.). At Iceland it has been taken a number of times along the whole of 

 the west side, in almost all the fjords of the east coast and in Skagestrand Bay on the north coast, 

 the depths being 0—2 fm. and out to 50 fm.; at the Faeroes it has been taken at various places in a 

 few fathoms water (Trangisvaag, Tveraa, KoUe Fjord, Vaag Fjord, Kvannesund, Skaale Fjord). 



Distribution. The species occurs at the Shetlands and the Hebrides (Norman), on the west 

 coast of Scotland at 56° N. L. (Bell) and in the Firth of Forth (Th. Scott). It is common in the Katte- 

 gat in ca. 2 — 12 fm., penetrates to the Sound and through the Belts into Kiel Bay and adjacent 

 waters (Meinert, Mobius). It is found at Bohuslan (Goes), along the whole coast of Norway (M. Sars), 

 on the coast of the Murman Sea and in the White Sea (Birula), in the Barents Sea (Hoek), at Spitz- 

 bergen (Kroyer, G. O. Sars etc.) and Franz Joseph Land (Scott), in the Kara Sea in 10 — 100 fm. (Hansen) 

 and at the north-west corner of Asia, ^n the east coast of America it goes as far south as Boston, 

 from there northwards it is found along the coast and is common at Labrador (S. I. Smith). It has \ 

 been taken on the north side of Alaska at Point Franklin (Murdoch); also in Bering Straits and the ( ' ^'^ 

 Bermg Sea both on the north east coast of Siberia and along the west coast of America southwards ) ' 



to 57° N. L., 3^/2 to 52 fm. (Mary Rathbun). Specimens from more southerly localities on the west 

 coast of America were in 1904 referred by Mary Rathbun to new species. 



The above data will have shown the main points in the bathymetric distribution of the species; 

 it is commonest from some few to ca. 50 fm., has been taken several times at 100 to 175 fm., but how- 

 far the statements of 240 and 250 fm. at West Greenland are correct must remain unsettled. We see 

 from its distribution that it occurs in both positive and negative bottom-temperatures. 



Remarks. Almost all authors have united S. gibba Kr. with .5". Gaimardii\ most have con- 

 sidered that 6'. gibba was the male, which at certain places or in certain seas obtains the well-known 

 dorsal process on the third abdominal segment. All the specimens of my large material from Den- 

 mark, the Fteroes and Iceland quite lack the dorsal spine, and are thus typical 5". Gaiinardii. From 

 Angmagsalik in East Greenland I have several large females, all typical S. Gaimardii, and 3 much 

 smaller males, all typical S. gibba. From most of the localities of West Greenland the specimens of 

 both sexes belonged to S. Gainiardii ; in Malac. Groenl. I mentioned I had seen some very large 



The Ingolf-Expedition. III. 2. 8 



.hS^ 



