CRUSTACEA MALACOSTRACA. 8l 



77. Gennadas elegans S. I. Smith. 



! 1882. Amalopeneus elegans S. I. Smith, Bull. Mus. Comp. Zool., Vol. X, No. i, p. 87, PI. XIV, figs. 8 14, 



PL XV, figs. 1-15. 



1903. Caiman, Ann. & Mag. Nat Hist, Ser. 7, Vol. XI, p. 416. 



1906. Gennadas elegans Bonvier, Bull. Musee Ocean. Monaco, No. 80. 



Occurrence. The "Ingolf" has brought home this species from 8 stations. 

 Davis Straits: St. 25: 63 30' N. L,., 54 25' W. L,., 582 fm., temp. 3-3; 2 spec. 

 West of Iceland: St. 12: 64 38' N. L., 32 37' W. L., 1040 fm., temp. 0-3; 2 spec. 



n : 64 34' 31 12' 1300 - r6; i 



South- West of Iceland: St. 83: 62 25' N. L., 28 30' W. L., 912 fm., temp. 3-5; i spec. 

 South of Iceland: St. 67: 6i3o'N. L,., 22 30' W. L., 975 fm., temp. 3-0; i spec. 

 - 69: 62 40' 22 17' 589 3-9; i 



40: 62 oo' 21 36' 845 - 3-3; i 



East of Iceland: -105: 65 34' 7 31' 762 - cr8; i 



In Malac. Groenl. it is mentioned that a specimen was taken in a fish at Sukkertoppen, a 

 colony in West Greenland at 65 25' N. L,. In 1903 and 1904 it was taken five times by the "Thor". 

 Four of these stations are in the deep water south of Iceland, from 62 47' N. L,. to 61 30' N. L,., 19 36' 

 W. Iy. to i5c>3'W. L,.; at three of these stations at least it was taken pelagically in the young-fish 

 trawl with 1800 to 1950 meters wire out; the fifth station lies "West of Iceland: 65 oo' N. L,., 28 10' 

 W. L,., young-fish trawl, 1000 meters wire out (depth of sea 1240 meters)". Concerning St 105 see under 

 distribution. 



Distribution. This species has been taken off the east coast of North America at localities 

 lying between 41 13' N. L,. and 3i4i'N. L.; the depths were from 372 to 2369 fm. (Smith). One 

 specimen was taken at 52 18' N. L., 15 53' W. L,. with the pelagic net sunk to 1410 fm. (Caiman). Ort- 

 mann states that it was taken in the Sargasso Sea with a closing net from 690 800 fm., and also 

 south of Cape Verde Islands in a vertical haul from 0213 fm., but whether his specimens really be- 

 longed to G. elegans or at least some of them to any of the species later established by Bouvier it is 

 impossible to say. Bouvier says on the distribution: Atlantique, Mediterranee. 



This species is not a bottom-form but lives pelagically, as a rule certainly in the deeper layers, 

 sometimes in higher layers. Bate has already expressed the same opinion regarding the genera 

 Gennadas and Bcnthesicymus. It is probably distributed throughout the deeper parts of the Atlantic, 

 but it is lacking in the sea between Norway and Greenland Iceland the Faeroes. As mentioned 

 above a specimen has indeed been taken in that sea at St. 105, and though this is in all probability 

 correct, it does not show in my opinion that the species lives in the cold area; the specimen must 

 have been carried there by the Gulf Stream. 



Remarks. The genus Gennadas greatly needs revision, and it is to be hoped that Prof. 

 Bouvier will examine the "Challenger" specimens and more fresh material from the Indian Ocean and 

 the Pacific. Ortmann and especially Caiman have remarked on the lack of agreement and the diffi- 

 culties in connection with the descriptions of the gills in Smith, Bate and Alcock. It may be added 



The Ingolf-Expeclition. III. 2. II 



