56 CRUSTACJ3A MALACOSTRACA. IV 



straca have a so wide geographical distribution together with so great independence of depth, temperature 

 and salinity of water. 



49. Diastylis lucifera Kr. 



1841. Cuma luci/era Kroyer, Naturh. Tidsskr. B. Ill, p. 527, 531, Tab. VI, Fig. 34 35. 



1848. Kroyer, Naturh. Tidsskr. Ny R, B.. II, p. 171, 207. 



1849. Kroyer, in Gaimard, Voy. en Scand., Crust. PI. Ill, fig. 3, a k. 

 1900. Diastylis G. O. Sars, Account, III, p. 49, PI. XXXVIII. 



1913. luciter Stebbing, Das Tierreich, 39. Lief. p. 101. 



Occurrence. Taken by the "Ingolf" at 4 stations. 



Davis Strait: Stat. 31 : Lat. 6635' N., Long. 5554' W., 88 fath., temp. 1.6; i specimen. 



Stat. 32: Lat. 6635' N., Long. 5638' W., 318 fath., temp. 3.9; 18 specimens. 

 Stat. 35: Lat. 65i6' N., Long. 55O5' W., 362 fath., temp. 3.6; 14 specimens. 

 Stat. 28: Lat. 65i4' N., Long. 5542' W., 420 fath., temp. 3.5; u specimens. 



Distribution. Distributed in the major part of Kattegat, entering the northern half of the Sound 

 and going through Store Belt into Langelands Belt; the depths generally 12 to 30 fath., a single time only 

 8 fath. ; furthermore frequently captured in Skager Rak in depths from 35 to 350 fath. (Meinert, H. J. Han- 

 sen). It is rather common along the whole coast of Norway, from the innermost part of Christiania Fjord 

 to Vadso, in 20 to 50 fath. (G. O. Sars). It is rather common in the major part of the North Sea, in the eastern 

 part southwards at least to Lat. 55 (Ehrenbaum), while in its western tracts it has been taken near Aber- 

 deen, in Firth of Forth (Th. Scott) and at some places at Northumberland and Durham, 25 to 59 fath. (Nor- 

 man and Brady) ; Norman records it from a place near Plymouth. Caiman records it from off Newfoundland, 

 206 fath., and from the Gulf of Maine, 54 fath.; S. I. Smith possessed it from the Bay of Fundy, 60 and 77 

 fath.; Whiteaves from the Gulf of St. Lawrence. 



50. Diastylis hastata n. sp. 



(PI. IV, figs. 4 a 4e). 



Adult Female (and immature Male). Cephalothorax, not including pseudorostrum, rather oblong 

 both from above and from the side, nearly as slender as D. Rathkii. Carapace moderately vaulted above, 

 and two-thirds of its dorsal margin somewhat sloping, especially anteriorly ; major anterior part of the dorsal 

 surface with a good number of irregularly distributed small or rather small spinules, and several such spines 

 are also found on the anterior part of the sides; ocular lobe with a few minute denticles; the whole lower 

 margin adorned with a close row of teeth which are long on the anterior part and also found on the posterior 

 part of the pseudorostral projection, while on about the posterior two-thirds of the margin the teeth are con- 

 spicuously shorter but not more slender, and towards the hind margin they are subquadratic. Pseudoro- 

 strum extremely long, only somewhat or even a little shorter than the carapace from the front end of the ocular 

 lobe to the posterior margin, considerably upturned, tapering regularly to the subacute end, with the upper 

 margin, seen from the side, very feebly convex, while half of the lower margin has a small number of remote, 



