6 Carl Bovallius, 



ganglion, the two ganglia of each pair are fused together or coalesced; 

 the commissural cords are still separated and well developed. The third 

 pleonal ganglion is the biggest, nearly twice as large as the preceding, 

 and probably composed of the last pleonal and all ural ganglia. It 

 supplies the last pleopoda and the whole urus with nerves. Four pairs 

 of strong nerves issue from it, the hindermost run to the anal orifice. 



The second to sixth pereional segments carry branchial sacks^ 

 ovate, ver}^ long, filled with a fibrous matter. They are fixed on the 

 under-side of the epimeral behind the point of articulation of the femur. 



A little before the same point the ovigerous lamellœ or ovitectri- 

 ces are fixed, but only on the second, third, fourth, and fifth segments. 

 These lamellee are uncommonly long, fringed with long straight fila- 

 ments. Those of the second segment are as long as the corresponding 

 legs themselves, those of the third and fourth pair only a little shorter. 



In one specimen only I was able to see the ovaria as long, thin, 

 flattened bodies, situated in the second, third, and fourth segments, close 

 to the upper side of the digestive canal. An oviduct was not to be de- 

 tected. The testes could not be observed, which was not unexsjDected, 

 as the only male specimen I got of Mimonectes Lovéni was very young, 

 and not in the best condition, having been preserved in alcohol for more 

 than twenty five years. 



The integument of the body is transparent, especially on the globe. 

 It is formed of large hexagonal plates, easily to be recognized on the 

 head and some other places. 



The head is nearly four times higher than long, very broad, 

 forming the forepart of the globe. Through the hyaline integument the 

 cephalic ganglion as well as the mouth-organs is to be seen. 



The eyes do not form a continuous mass on each side of the 

 head as in the other Hyperids, but consist of 8 — 10 large ocelli, scat- 

 tered over the lower side of the head. These do not show such long 

 crystallic elements as in Phronima, Rhabdosoma, and others, but seem 

 to be composed each of a great many granular, fine, light-breaking 

 corpuscles interspersed with dark-brown pigment. 



The upper antennce [PL I. fig. 2] consist of two-jointed pedun- 

 cles. The basal joint is very stout and thick [coalesced of the two 

 first]; the second [viz. the third] is short, not equalling a fourth of the 

 preceding; the stout, straight flagellum issues from it. The flagellum 

 is four-jointed; the first joint is more than twice longer than the pe- 

 duncle, serrated at the upper margin and ending in a strong double- 



