184 
margin, the second joint tolerably short, the third one of about medium length, smooth, and 
in the specimen drawn, as well as in other larve taken out of the same ovisac, this joint 
is curved forward in the same way as in the hinged specimens of other species. The basal 
joint of the maxillipeds is long, the second joint a little shorter than the third; the fourth 
joint has five or six setiform processes along the central part of the inner margin. The 
peduncle of the natatory legs is rather slender. The abdomen of medium length; the first 
segment somewhat longer and broader than the second, and the sete of its posterior angles 
reaching only a little beyond the caudal stylets; the third segment somewhat narrower and 
shorter than the second; the caudal stylets well set off, their setze unusually short, not nearly 
half the length of the cephalothorax. — Fig. 2i shows a larva in the act of changing into 
a pupa (or a male?); it is represented in a dorsal view; the cephalothorax is short and broad; 
the outline of the contents is shown by an inner line. 
POST-LARVAL DEVELOPMENT. Unknown. 
HABITAT. The marsupium of Erythrops abyssorum G.O.S. from Norway. In a 
specimen without indication of locality (bearing a specimen of Aspidoecia), occurred a large 
female with fifteen ovisacs of widely differing sizes, as well as a considerable lump of empty 
ovisacs, which could not be counted; no male. In another specimen without locality (with 
two small specimens of Aspidoecia), appeared one female with fourteen ovisacs, extremely 
varying in size, and a great deal of them adhering to each other, one of them being empty; 
moreover, a female glued to an ovisac; no male, but the above-mentioned small female of 
Mys. commune. In a specimen from Kyalo (bearing one large and four small specimens of 
Aspidoecia on its carapace), occurred one completely torn female with twelve fine, almost 
equally large, mostly short and broad, somewhat flattened ovisacs, which on account of 
mutual pressure were somewhat polyhedrous in shape; among them were found a male, also 
the head and the skin of the anterior fourth part of the trunk of another female, and_ to 
€ 
this skin were attached five males and the broad larva represented in fig. 21; furthermore, 
I found two good normal males and the two above-mentioned dwarfish males, which were 
fastened to the marsupial plates by their frontal threads, — which makes altogether ten 
males —; finally four broad larvee which had no doubt been hinged, and the contents of 
which were undergoing the transformation. 
VI. Aspidoecia Giard and Bonnier (1889). 
FEMALE. The body is considerably broader than long. The head, which is pretty 
well defined, occupies a somewhat different position relatively to the genital apertures, from 
that of the earlier forms: in fig. 3c the genital apertures in relation to the head are placed 
