34 C. BOVALLIUS. ASELLIDA. 
The uropoda are styliform, each with two linear, lami- 
nate rami. 
Through I. Bovallii Studer, the genus Ianthe is connected 
with Ianira. 4 
Of I. Bovallii we do not know the form of the uro- 
poda. Of I. spinosa, Harger only the female is known of 
I. speciosu, Bovallius, only the male. 
1. Ianthe spinosa. O. HARGER. 
Syn. 1879. Janira spinosa. O. HARGER. >»Notes on New England Iso- 
poda>. Proceedings of the Uni- 
ted States National Museum, 
1879. -Voks2y pose: 
1880. » > 2 >Report of the marine Isopoda 
of New England and adjacent 
waters». Report of the U. S. 
Commissioner of Fish and 
Fisheries. Vol. 6, p. 323, pl. 2, 
fig. 10. 
The rostrum is as long as the head, the lateral angula- 
tions of the head are directed forwards, shorter than the 
head. The long diameter of the eyes equals a third of the 
length of the head. The flagellum of the first pair of an- 
tenne is about 12-articulated. The first pair of antenne are 
shorter than the breadth of the head (4:5). The flagellum 
of the second pair of antenn& consists of about 50 articuli. 
The first segment of the pereion is shorter than the second, 
the second and third, equal, are the longest, much longer 
than the seventh; each carrying two short spine-like tu- 
bercles. The lateral margins of the first, fifth, sixth, and 
seventh segments are produced into one angulation one ach 
side, the second, third, and fourth into two. The pleon is 
smooth on the upper side, without spine-like tubercle; it is 
produced backwards into two flattened, sharp-pointed angula- 
tions; between these the uropoda are fixed. The peduncles 
of the uropoda are longer than the angulations. The outer 
ramus is shorter than the inner (3:4). 
Colour. White (in alcohol). 
Length. 8 mm. 
Hab. »Banquereau, the coast of Canada. 
