CRUSTACEA COPEPODA. II. 
NI 
N 
and maxillipeds are seen as protruding naked pouches of somewhat irregular shape. The whole pupa is clothed 
with hairs which are conspicuously longer posteriorly than anteriorly, only the pouches mentioned and 
the intervals between them are naked. 
Remarks. — Both in male and female the antennule and the distal joints of the maxillipeds are 
more reduced in size and degree of development than is generally the case in the rich genus Spheronella. 
The pupa and the larva show more affinity to forms parasitic on Cumacea than to those on Amphipoda. 
Occurrence. — The parasite, which has not been secured by the “Ingolf”’, inhabits the marsupium 
of Pleurogonium spinosissimum G.O.S., and has been gathered at Iceland at the following places. 
North-West Iceland: Onundarfjord, 11—12 fathoms, 18/V 1893, Mag. sc. W. Lundbeck; 1 larva. 
East Iceland: Mjoifjord, 40 fathoms, 19/V 1899, Mag. sc. R. H6rring; on one host 1 female (nearly 
empty) and 2 long ovisacs (male not looked for). 
_— —  Faskrudsfjord, 20—5o0 fathoms, clay, 17/VII 1899, Mag. sc. R. Horring; 2 infested 
females, one with 1 female, 1 larva and 1 pupa; the other with 1 female and 1 male. 
— — Breiddalsvik, 6 fathoms, mud and black sand, 18/VII Igoo, Dr. A. C. Johansen; 
7 females infested: one with 1 large female and 1 male, the second with I very 
large female (the type figured) and 1 larva; the third with 2 very long ovisacs 
and I quite small, almost empty and shrivelled female (0.62 mm. long, 0.21 mm. 
broad), the fourth specimen infested as the third; the fifth has the marsupium 
filled with nearly developed larve. In the two other specimens the marsupium 
has not been opened. 
Choniostoma H. J. H. 
This genus comprises hitherto only 2 species, both from the arctic and boreal regions, and both 
found in the “Ingolf’’ area. — It may be noted here that in spite of special search I have not yet been able 
to discover any male of the genus. 
96. Choniostoma mirabile H. J. H. 
1886. Choniostoma mirabile H.J. Hansen, Dijmphna-Togtets zool.-bot. Udbytte, p. 271, Tab. XXIV, 
figs. 7—7 h. 
11897. — —  H.J. Hansen, Choniostomatide, p.171, Pl. X, figs.5a—5c; Pl. XI, figs. 
1 a—t kk. 
Occurrence. — Not taken by the “Ingolf’’, but by two other expeditions. 
East Greenland: Angmagsalik (Lat. 65°30’ N.), 3—o fathoms, 2nd Amdrup-Exped. 14/IX 1900; 
on the left side of the carapace of Spivontocaris Gaimardiu H. M.-Edw. in a 
large swelling 1 female and 12 ovisacs. 
South-West of Iceland: Lat. 63°46’ N., Long. 22°56’ W., 150 met., temp. 7°28, the “Thor” 2/VII 
1904; I specimen of Spirvontocaris Lilljeborgit Danielssen with 1 female 
