12 Ö-. Ô. Sårs. 



horn-coloured capsule of a trigonal, or more correctly 

 tetrahedric shape, exhibiting 4 plane or very slightly concave 

 faces of exactly the same size and form, and connected by 

 obtuse, prominent ribs. As far as I know, in no other 

 Branchipodid has a similar form of the egg-capsules been 

 observed. In all the previously known forms, the eggs are 

 simple globular bodies, and it is only in some of the 

 bivalve Phyllopoda, for instance in Limnadia, that an 

 analogous structure of the egg-capsules occurs. 



The body in the living animal was highly pellucid and 

 nearly colourless, with only a very faint yellowish tinge on 

 the branchial legs. The caudal rami, however, exhibited a 

 most pronounced vivid reddish orange colour. 



Biological Observations. 



The above described specimen was raised by the present 

 author in the summer of 1886 from dried Australian mud, and 

 was watched for some time in a small aquarium. The larval 

 stages, however, wholly escaped my observation, and the 

 animal, when first detected, had already attained a rather 

 advanced stage of development, though still without any trace 

 of a marsupium. After the lapse of some time, the marsupiiun 

 was formed, and a number of the peculiarly formed eggs 

 soon made their appearance within it. At this time, however, 

 the aquarium unfortunately became so encumbered with 

 oonfervous growth, that the animal was considerably impeded 

 in its free movements, and as it showed signs of disease, 

 I hastened to secure it, after having previously made 2 

 carefully executed and coloured drawings (the ones here 

 reproduced) from the animal when still alive. Though I 

 carefully preserved the residue of the aquarium for later 

 hatching operations, no specimens developed subsequently. 



