252 K. SrEPHENSEN. 
When H. J. Hansen drew up his list of the Malacostraca of W. 
Greenland, in 1887, it was only known from 4 places in all, viz.: Nanor- 
talik, Ivigtut, Umanak and Proven. In 1911, it was found by Dr. Norp- 
MANN in Northern Stromfjord, abt. 67° N. (vide my work on this expe- 
dition, p. 65). The present find thus adds a new locality. 
On the Developement of the Genus Spirontocaris. 
Although the genus Spirontocaris is widely distributed throughout 
the northern seas, there are, strangely enough, but few writers who have 
studied its developement. 
No species has been described from the egg to its full growth; ~ 
G. O. Sars has, however, recently given a description of the postembryo- 
nal developement of an allied form, Hippolyte varians Leach (in Archiv 
for Math. og Naturvid., Kristiania, vol. 32, Nr. 7, 1912, p. 1—25, with 
three double page plates). 
I have been carefully through the literature on the subject, but 
have not been able to find anything beyond what is mentioned below. 
Spirontocaris sp. Claus, Zur Kenntnis d. Malacostracen-larven; 
Wirzburg Naturwiss. Zeitschr., vol. 2, 1861, p. 40, Pl. 3, fig. 8. 
Sp. polaris, embryo, Kroyer, Monograf. Fremstill. Sl. Hippolyte; 
Kgl. Danske Vid. Selsk. Math.-Naturvidensk. Afh., 1842, p. 245, Pl. 6, 
fig. 120—-32. 
Sp. Cranchit and Sp. pusiola. Sars states in a footnote on p.5 of 
his work above mentioned, on Hippolyte varians, that he has hatched 
out these species, but he does not describe their developement. 
Sp. sp. Some developemental stages, including a young stage of 
Sp. groenlandica, 1 have myself described in Danmark Exped. 1912, 
p. 516—25, Pl. 39—43, and in the “Tjalfe” Exped. 1912, p. 126, fig. 32. 
This then, is all I have been able to find. As, however, the material 
collected by myself includes much bearing upon this question, I have 
taken the opportunity to clear up various points in connection therewith. 
As will be seen in the: following pages, the quantity of material 
brought home by the present expedition is so large as to more than 
double our knowledge of the developement in this genus; this is due 
partly to the use of the ringtrawl, and partly that of the stramin 
dredge, both of which fished with an unusual degree of intensity. 
The material includes young stages of 4 species, of which two not 
hitherto known, and larvae of 4 species, of which one only has previously 
been described, and this, moreover not with certainty. A fifth Decapod 
larva is also new, but as it presents strong points of difference, I have 
not ventured to regard it as altogether certainly belonging to this genus. 
G. O. Sars, in his Account of the postembryonal developement of 
Hippolyte varians (Archiv f. Math. og Naturvid., Kristiania, vol. 32, 
Nr. 7, 1912, p. 21—22), states that the older larvae of Hippolyte and 
