66 
(St. 15) 58° 08' N, 89° 24' W. 500 m. wire, 26—5—1908. 2 spec. 
(St. 76) 63° 49' N, 53° 27'W, 1300 m., 1300 m. wire, 23-6—1908. 1 spec. 
(St. 429) 63° 54' N, 53° 15' W, 988—1400 m. 8-6—1909. 1 spec. 
(St. 407—08) 64° 14'N, 55° 55' W, 889 m. clay. 2—6—1909. 1 spec. 
Kemp (1. c. 1908 (1910) p. 42—43) has given a synopsis 
of the characteristics of P. tar da Kroyer and P. princeps S. J. 
Smith. Kroyer has published his description in Danish, and it 
seems that owing to this foreigners have not been able to read his 
description; otherwise Smith would probably not have founded I. 
princeps as a new species. In order to show the gieat agieement 
in the descriptions of Kroyer and Smith, I have made the 
following synopsis of the most important characters. 
P. tarda Kroyer. 
(Naturhist. Tidsskrift, ser. 2, 
vol. 1, 1844—45, p. 453 seq.) 
1. “The carapace, which is about 
i/s of total length or half as long 
as the pleon including telson, is 
very much compressed”. (From 
Kroyer’s fig. in Gaimard: 
Yoyage en Scandinavie, the car¬ 
apace is seen to be 39 mm., abdo- 
men excluding telson 59 mm.). 
2. “On the dorsum of the ca¬ 
rapace is seen a sharp, but 
smooth carina, which goes about 
to the hinder edge of the cara¬ 
pace, terminating anteriorly in 
a little, mucronate and very much 
compressed rostrum, that 
projects a little the anterior edge 
of the carapace”. 
P. princeps S. J. Smith. 
(Report U. S. Fish Commission 
for 1882 (1884), p. 381 seq.) 
1. The pleon exclusive of the 
telson is about one half longer 
than the carapace”. (Carapace 
75 mm., pleon excluding the tel¬ 
son 112 mm.). 
2. “The dorsum of the carapax 
is rounded except for about a 
third of the length anteriorly, 
where it rises into a carina ter¬ 
minating in a short, mucronate 
and obliquely upturned rostrum 
overhanging, but projecting 
scarcelv as far forwards as the 
i/ 
front itself, which is prominent 
though rounded in outline as 
seen from above”. 
