Zoogeographical Investigations in Southern Greenland. 265 
number of specimens (the adult Sp. groenlandica was taken at all 
the above mentioned stations, besides others). And my new material 
being better than that from the Danmark Exped., some further obser- 
vations may be added. The rostrum is short and heavy. The lateral 
edges of the telson have, not one but two pairs of small spines; each 
Rostrum ete. 
Carap. 
Fig. 14. Spirontocaris Fabricii(?) Juv. 
of the posterior corners is armed with 2 small spines and one large. 
The posterior edge of the telson has 5 large spines in the centre; some 
few specimens however, have here 4 large spines and one small; others 
again only 4 or 3 (large) spines. Between the median portion and the 
large spine at the corner are 4 bristles and one between each two of the 
large spines of the posterior edge. 
The adult has exopodite on pl—p3; in the young stage, there is 
