78 CRUSTACEA COPEPODA. II. 
and 3 ovisacs in a large swelling on the left side of the carapace, and 
a large Sylon Hippolytes Kr. on the abdomen. 
In the work quoted it is mentioned (p. 174) that ovisacs of a species of Choniostoma were found 
on S. Gaimardii from the Davis Strait at Lat. 66°30’ N., Long. 54°50’ W., 40 fath., but as no female was 
present it was impossible to determine the parasite. 
Distribution. — Kara Sea, the branchial cavity of S. Gaimardu (H. J. Hansen). — In my mono- 
graph it was stated (p. 174) that specimens of Choniostoma had been secured by Max Weber on S. Gaimardit 
from the Murman Sea, and by Sparre Schneider on the same shrimp from Hilleso in the Malangen Fjord 
(Finmarken), but that in both cases the parasite could not be referred to species. 
97. Choniostoma Hansenii Giard & Bonn. 
1889. Choniostoma Hansen Giard & Bonnier, Bull. scient. de la France et de la Belgique T. XX, p. 366 
[without description]. 
1895. --- — Giard & Bonnier, Bull. sci. France et de la Belg. T. XXV, p. 479. 
11897. — — H.J. Hansen, Choniostomatide p.174, Pl. X, figs. 6a—6b; Pl. XI, figs. 
2a—2 f. 
Among the 4 immature females taken together (see below) the largest specimen has arrived at the 
shape of the adult; it is 1.67 mm. broad and 1.5 mm. long; the 3 other specimens are nearly circular in out- 
line, and the diameter of the smallest specimen is 1.05 mm. All 4 specimens are somewhat depressed. The 
largest specimen has a number of proportionately long setee on the sides and some on the dorsal surface, 
while the ventral surface is naked excepting towards the margins and besides the median part of the front 
margin. The small females look more setiferous than the largest specimen, but the distribution of their long 
setee on the body is about the same. 
Occurrence. — Not taken by the “Ingolf’’. 
West Greenland: Lille Karajak Fjord (ab. Lat. 70°20’ N.); specimens taken by Dr. E. Vanh6ffen 
on Spirontocaris Gaimardi M. Edw. and S. polaris Sab. 
North Iceland: “Reykjarfjordr’’, 3—o fathoms, “Diana” (A. Ditlevsen) 21/VII 1902; 1 female and 
Q ovisacs in a large swelling on the right side of the carapace of Spivontocaris 
Gaimardir; the shrimp has besides on the abdomen a moderately young female 
with male of Phryxus abdominalis Kr. 
North-East Iceland: Midfjord, 40'/,—50 fathoms, “Diana’’ (Mag. sc. R. Hoérring) 14/V 1898; 2 in- 
fested specimens of S. Gaimardii. One of these specimens is an ovigerous 
female; its carapace is scarcely swelled on the left side, nevertheless the 
branchial cavity contained 4 immature females rather different in size 
(see above), but no ovisacs or male; the right side of the same shrimp 
is distinctly swelled and the branchial cavity contained 2 females very 
different in size — the large one scarcely full-grown — and besides a 
larva in second stage of an Epicarid, probably Bopyroides Hippolytes Kr. 
