CRUSTACEA MALACOSTRACA. III. 



which are small and quite short This structure, which has been mentioned on p. 10 as being of great 

 morphological significance, I am not prepared to consider as being only of specific value. It seems to 

 me, that this feature makes it necessary to establish a new genus; as Tattersall has taken Munnopsis 

 australis Bedd. as the type for his genus Munnopsoides, I keep this generic name, and, according to 

 the above-named supposition, refer my new species, eximius, to it, but the result is that I must estab- 

 lish a new genus for the reception of Munnopsoides Beddardi Tatt, and the name Pseudomunnopsis 

 n. gen. is proposed. 



Paramunnopsis n. gen. 



Description. Body rather oblong; third and fourth thoracic segments somewhat broader 

 than the fifth segment, which is conspicuously broader than the seventh. - First antennular joint is 

 an oblong plate without any protruding distal angle. Antennae extremely long; the squama (PI. XIII, 

 fig. nb, ex) somewhat small but protruding. Mandibles (figs, n c n e) with the incisive part produ- 

 ced and its edge divided into some triangular teeth, the movable lacinia on left mandible somewhat 

 long with teeth on its terminal margin, the setae numerous and well developed, the molar process 

 slender and tapering to the acute or subacute end; palp long and robust. Maxillipeds (fig. n f) nearly 

 as in Munnopsis. 



The three posterior thoracic segments and abdomen movable; fifth segment produced much 

 forwards, overlapping a more or less considerable part of the fourth (PI. XIV, fig. i a). First pair of 

 legs moderately slender, prehensile (second pair in P. spinifer Vanh. $ considerably longer and thinner 

 than first pair, in the main as in Munnopsis}. Third and fourth pairs extremely long, nearly as in 

 Munnopsis. The three posterior pairs differ from those in Munnopsis in having the fifth joint not only 

 much broader than the sixth but differently shaped, as the anterior margin is nearly straight, the 

 major part of the posterior margin extremely convex. 



The two anterior pairs of male pleopods in P. oceanica (they are unknoWh in the two other 

 species) show characters probably of generic value. First pair (fig. n g) increase much in breadth 

 from somewhat from the base to beyond the middle, and then tapers to the rather narrow end, which 

 has two pairs of small lobes. Second pair (fig. n i) have about their proximal third fused, so that no 

 vestige of a suture is seen in the median line; first joint of the copulatory organ long and directed 

 forwards, while the second joint is produced in a long, nearly filiform part reaching considerably beyond 

 the pleopods, and the vesicle is rather far removed from the base of the joint Uropods uniramous, 

 two-jointed, long or extremely long. 



Remarks. As the type I take Munnopsis oceanica Tatt, but M. longicornis H.J.H. (1895) and 

 M. spinifer Vauh. (1914) belong to the same genus. In the description of the genus features in all 

 three species have been taken into account; excepting the male pleopods most characters can be seen 

 in the text or in the descriptions of the two last-named species. - It may be observed that all three 

 species are really pelagic animals, but only one is represented in our material. 



