106 CRUSTACEA MALACOSTRACA. II. 



a little longer than the two preceding segments combined; pleopods well developed, biramous, with 

 the exopod much longer than the peduncle and its terminal setae about as long as the pleopod. - 

 Length 2.1 mm . 



Remarks. This small and very slender species is easily distinguished from all other forms 

 by its very long and peculiarly shaped uropods. 



Occurrence. It has been taken by the "Ingolf at the two deepest stations. 



South-West of Cape Farewell: St. 38: Lat. 59 12' N., Long. 51 05' W., iSycfm., temp. 1.3; 3 spec. 

 - St 22: Lat. 58 io'N., Long. 48 25' W., 1845 fm., temp. 1.4; i spec. 



CryptOCOpe G. O. Sars. 



This genus was established in 1880 on two species, C. abbreviata G. O. Sars and C. Veringii G. 

 O. Sars. C. abbreviata must be considered the type, at it was described several years before the other 

 species and by Sars placed before C. Voringii, when he established the genus. Later I established 

 C. arctica which is related to C. abbreviata. Norman & Stebbing established Strongylura arctophylax, 

 which is nearly related to C. Voringii and must be transferred to Cryptocope. This genus is closely 

 related to Leptognathia, the only important difference between the two genera being the existence of 

 four pairs of marsupial lamellae in Leptognathia and only a single pair in Cryptocope. But females 

 with marsupium are known only of C. abbreviata and C. arctica, while they are unknown not only of 

 C. arctophylax but of C. Voringii, as far as I may infer from Sars' detailed description of this species. 

 But the genus may be divided into two groups, the first comprising C. abbreviata and C. arctica, 

 which are small and very thick species and besides closely allied, the second group comprising C. 

 Voringii and C. arctophylax, both large, less robust and closely allied but differing much in the relative 

 length of the thoracic segments and in general aspect from the two other species. As the marsupium 

 is unknown in these two large species it may be somewhat uncertain whether they have only a single 

 pair of marsupial lamellae, and if in the future that should prove not to be the case, these two species 

 must be removed from Cryptocope and a new genus be formed for them. But at least provisionally 

 they may be referred to Cryptocope. 



68. Cryptocope arctica H. J. Hansen. 

 (PI. XI, figs, i a ih.) 



! 1886. Cryptocope arctica H. J. Hansen, Dijmphna-Togtets zool.-bot. Udbytte p. 209, Tab. XXI, fig. 4. 

 1887. Vidensk. Medd. naturhist. Forening i Kjobenhavn for 1887, 



p. 180, Tab. VII, Fig. i ic. 



Female. Extremely thick (fig. la), from four to four and a half times as long as broad. - 

 Carapace extremely large (fig. la), only a little shorter than the four following segments combined, 

 somewhat longer than broad, at the front end scarcely half as broad as somewhat behind the middle, 

 with the lateral margins somewhat convex. 



