4 ARKIV FÖR ZOOLOGI. BAND 9. NIO 6. 



2. The upper edge of the rostrum with only two teeth 



S. microceros Kröyer. 

 C. Two spinae över the orbits at the base of the rostrum. 



1. Upper edge of the rostrum with two or three strong 

 teeth 8. groenlandica I. C. Fabricius. 



2. Upper edge of the rostrum with numerous teeth (more 

 than five). 



a. The lower edge with 4 — 6 teeth S. turgida Kröyer 



b. » » » » 2 — 3 » 



*. Rostrum shorter than the scaphocerit, extending 

 backwards almost to the posterior margin of 

 carapace S. spinus Sowerby. 



**. Rostrum of the same length as the scaphocerit, 

 extending backwards to ^/s of the length of the 

 carapace S. spinus var. Lilljéborgi Danielsen. 



Eupaguriis porcellanus n. sp, 



Fig. 2. 



Diagnosis : 



The hand of the right cheliped is entirely smooth 

 and of rectangular shape. The carpus is strongly 

 developed on the right cheliped. The peduncels of 

 the externa] antennse are longer than the eyes. 



The most specific character of this species is the com- 

 pletely smooth surface of the carpus and of the hand of the 

 chelipeds and also their shape. The carpus of the right cheliped 

 is well developed, length and breadth equal, with its inner and 

 upper margin dentated. The hand of the rigth cheliped is 

 rectangular and very powerful. The hand of the left che- 

 liped is oval in shape, the carpus is oblong, only its inner 

 edge is dentated. 



The second and the third pairs of legs are large but 

 without chelse. The fourth and the fifth pairs are small 

 and serve to keep the animal within its shell; this is also 

 the case with the only abdominal pair of legs, which is al- 

 most rudimental. 



The surface of the carapace is smooth and has no tuber- 

 cules or groups of hairs. 



The internal antennae are short and with small filaments, 

 the peduncels have three joints. The external antennas have 

 long filaments and three-jointed peduncels. 



