I2 8 CRUSTACEA MALACOSTRACA. III. 



Occurrence. Taken by the "Ingolf" at two of its deepest stations in the warm area. 

 Davis Strait: Stat. 36: Lat. 6i°5o' N., Long. 56°2i' W., 1435 fath -> tem P- I '5°; 2 s P ec - (o*, ?)• 

 South of Davis Strait: Stat. 38: Lat. 59°i2' N., Long. 5i°o5' W., 1870 fath., temp. 1-3°; 1 spec. 



Echinozone G. o. Sars. 



Among the generic characters pointed out by Sars two would at first sight seem to be of some 

 importance, viz. that the mandibles have no palp and that the uropods are biramous. Sars established the 

 genus on a single species previously described by him as Ilyarachna corona/a, which is conspicuously 

 thicker than the other forms of Ilyarachna and adorned with larger spiniform processes on the front 

 margin of the four anterior segments. But characters drawn from the relative breadth of the body 

 and the armature cannot be used in the diagnosis of the genus Echinozone, as I have a new species, 

 which has the body as slender as Ilyaraclnia and no armature on the anterior segments, but agrees 

 with E. coronata and differs from Ilyarachna in the two features especially pointed out by Sars, viz. 

 no mandibular palps and biramous uropods. Under these circumstances the genus Echinozone seems 

 to me to be of very slight value, ought perhaps to be cancelled, and the same is the case with the 

 genus Aspidarachna G. O. S. But I have not withdrawn these two genera, because, still, we certainly 

 know too few of the species belonging to or allied to Ilyarachna. 



83. Echinozone coronata G. O. Sars. 



1870. Ilyarachna coronata G. O. Sars, Forh. Vid. Selsk. Christiauia for 1869, p. 168. 

 ! 1897. Echinozone G. O. Sars, Account, II, p. 139; PL 61, fig. 2. 



The specimens to hand agree, on the whole, well with Sars' figure as to the length and arrange- 

 ment of the thoracic dorsal processes. Only two fine and large specimens, both from the "Ingolf" 

 Stat. 35, show a marked difference. In normal specimens short denticles alternate with long and robust 

 spiniform processes on the front margins of the four anterior segments, but in the two specimens 

 mentioned most of the denticles are spiniform and much longer than usual, being half or conspicuously 

 more than half of the long processes. The largest of these specimens is 5 mm. long, thus agreeing 

 with the length stated by Sars. 



Occurrence. Captured by the "Ingolf at four stations in the warm area. 



Davis Strait: Stat. 32: Lat. 66°35' N., Long. 56°38' W., 318 fath., temp. 3-9°; 1 spec. 

 Stat. 35: Lat. 65°i6' N., Long. 55°05' W., 362 fath., temp. 3-6°; 3 spec. 

 Stat. 25 : Lat. 63°3o' N., Long. 54°25' W., 582 fath., temp. 3-3° ; 6'/ 2 spec. 



South-West of Iceland: Stat. 78: Lat. 6o°37' N., Long. 27°52' W., 799 fath., temp. 4-5°; 3 spec. 



Furthermore, it has been secured by the "Thor" at a single place. 



South of Iceland: Lat. 63°i5' N., Long. 22°23' W., 114— 172 fath.; 1 spec. 



Distribution. A specimen was taken by Cand. mag. Ad. Jensen (in "Michael Sars") between 

 Shetland and Norway: Lat. 6o°57' N., Long. 3°42' E., 190 fath. Otherwise it is known only from places 

 at the west coast of Norway and at Vadso in the Varanger Fjord, 100—300 fath. (G. O. Sars). 



