Prof. F. Vejdovsky on Freshioater Sponges. 13 



rostrum and the inner canthus of the eye, and the third joint 

 is slender, cylindrical, and longer than the second. The merus 

 of the exterior maxillipedes is considerably dilated at the 

 antero- external angle. A few hairs upon the carapace and 

 legs. Colour brownish. 



Hab. ? (South Australia, Port Lincoln : coll. Brit. 



Mus.) 



The description, slightly amplified, is adapted from Milne- 

 Edwards's work; the figure from sketches, very kindly sent 

 by Prof. A. Milne-Edwards, of the type specimen in the Paris 

 collection. The eye-peduncles should probably be repre- 

 sented as more distinctly constricted near to the distal extre- 

 mity, and the second antennal joint as more dilated, as in 

 Milne-Edwards's description and the type of j\I. parvirostris 

 in the British Museum. This latter further differs from the 

 figure now given only in having the penultimate as well as 

 the antepenultimate joints of the legs sometimes armed with a 

 few tubercles. 



EXPLANATION OF PLATE I. 



Fig. 1. Paramieippa tuberculosa, M.-Edw. Adult female, magnified (from 

 a sketch of the type specimen in the collection of the Museum 

 d'Histoire Naturelle, Paris). 



Fig. 1 a. Dorsal view of the front of the cervical region. 



Fig. 1 b. Inferior view of part of the cervical region, showing the form 

 of the basal antennal joint and exterior maxillipedes. 



Fig. 1 c. Chelipede. 



IT. — Observations on some Freshioater Sponges. 

 By Professor Franz Vejdovsky *. 



Dr. W. Dybowski not long since sent me some specimens, 

 well preserved in alcohol, of the freshwater sponge desig- 

 nated by him Spongilla sibirica, with the request that I would 

 submit them to an examination, and prepare the figures thus 

 obtained for his memoir relating to the above-mentioned 

 species f. I undertook this investigation the more willingly 

 because, since the appearance of Dr. Dybowski's work upon 

 the freshwater sponges of the Russian empire, I was very 



* Translated by \V. S. Dallas, F.L.S., from a separate copy, furnished 

 by the author, of the paper in the ' Sitzungsberichte der k. bbhmischen 

 Gesellschaft der Wissenschaften,' 1884, pp. 55-60, pi. ii. 



t As Dr. Dybowski's parcel was rather late in reaching me and he had 

 in the meantime sent his memoir to press, I publish these observations as 

 a supplement. 



