CRU.STACEA MALACOSTRACA. 69 



of B. gracilis, and it is therefore to a certain extent misleading. Further, there is also some difference 

 ill the form of the scale in my specimens of B. gracilis: in the specimen from St. 67 the part beyond 

 the spine on the outer margin is more prolonged, the scale itself relatively longer and with almost 

 parallel margins; the specimen thxis differs in the form of the scale more from B. Payeri than is the 

 case with the specimens from the Davis Straits, in which the margins of the scale diverge forwards. — 

 The differences between B. Payeri and B. gracilis are thus very small, but as the differences exist the 

 species should be maintained, at any rate until further knowledge of the variation and geographical 

 distribution has been obtained. 



63. Bythocaris simplicirostris G. O. Sars. 



1870. Bythocaris simplicirostris G. O. Sars, Vid. Selsk. Forh. Christiania, f. 1869, p. 149. 

 ! 1874. Hippolyte Panschii Buchholz, Zweite Deutsche Nordpolarfahrt, B. II, p. 277, Taf. I, Fig. i. 

 1894. Bythocaris simplicirostris Norman, Ann. Mag. Nat. Hist, Ser. 6, Vol. XIII, p. 270, PI. XII, fig. i. 

 1897. — — Birula, L'Aiiuuaire du Mus. Zool. de I'Acad. Imp. de St.-Petersbourg, 1897, 



p. 427, Tab. XX, Fig. 3. 

 1901. — — Ohlin,Bih.tillK.SvenskaVet.-Akad.Handl.,B.27,Afd.IX, no.8,p.39, Fig. I. 



Occurrence. The "Ingolf has only taken this species at one station. 



South-East of Iceland: St. 4: 64° 7' N. L., ii°i2'W. L., 237 fm., temp. 2-5°; i spec. 



The species is described under the name Hippolyte Panschii by Buchholz from a specimen 

 taken in 30 fm. at Nordshannon, which lies in ca. 75° N. L. on East Greenland; I have seen an East 

 Greenland specimen from ca. 7473° N. L., near Pendulum Islands, no fm. (2"'' Amdrup Exj^ed.), and a 

 specimen was taken in 133 fm. a little more to the south, namely, off Kaiser Franz Joseph Fjord 

 (Ohlin). Lastly, I have seen a .specimen taken a little east of the south end of the Fseroes: 6i°23'N. L., 

 5° 04' W. L., 255 fm., temp. 0° (Wandel). 



Distribution. Sars founded B. simplicirostris (see Remarks) on a specimen taken at Skraaven 

 (Lofoten) in 250 fm.; later, it was taken by the same author at 72° 27' N. L, 20° 51' E. L, 191 fm.. 

 temp. 3'5° and at 78° 2' N. L, 9° 25' E. L, 416 fm., temp. o-8°; Metzger notes it from Mandal, 60 fm., 

 Norman from Trondhjem Fjord, 250 — 300 fm., Nordgaard from Trano Deep, 322—340 fm., and from 

 Malangen (ca. 69'/2° N. L), ca. 50 —100 fm. Lastly, it is given from the western part of the Murman 

 Sea (Birula). 



Remarks. I have referred my specimens to B. simplicirostris and included B. Panschii as a 

 synonym. If the former is incorrect, I venture to think with a considerable degree of certainty, that 

 OhHn's specimen from East Greenland and G. O. Sars' specimens from ca. 72^/2° and 78° N. L have 

 also been incorrectly determined, as all these have undoubtedly belonged to B. Panschii. The question 

 is therefore, whether this species is identical with B. simplicirostris or not. It cannot be settled with 

 certainty from the available descriptions, but both the distribution and Sars' own reference of his 

 specimens from the Norwegian North-Atlantic Expedition to the species from Lofoten speak strongly 

 in favour of it. Sars certainly writes: "Oculi minimi subcylindrici, pigmento pallide fulvescente", and 

 this seems to tell strongly against my determination (unfortunately, neither Sars nor Ohlin refer later 



