38 



DISCOVERY REPORTS 



moderately slender, subequal in length. Maxilliped, outer plate with smooth inner 

 margin. Gnathopod i feebly subchelate. Uropod 2 with inner ramus constricted. 

 Uropod 3, 2nd joint of outer ramus two-thirds length of 1st. Branchiae simple, 

 apparently without accessory branchiae. 



Remarks. A genus which has many of the characters of Onisimus, but which differs in 

 the subequal and more slender lobes of maxilla 2, and the large 2nd joint of the outer 

 ramus of uropod 3. In both of these characters it resembles Lysianella, but lacks the 

 enlarged 4th joint of antenna 2 found in that genus. The produced upper lip is com- 

 parable with that of Lysianella. From Paronesimns it is distinguished by the 2nd maxilla. 

 The epistome and upper lip for this latter genus are not described, unless we can 

 assume from Stebbing's words (1894, Bijdr. Dierk., xvn, p. 14) : " The single specimen 

 was dissected under the impression that it belonged to Chironesimus debruynii. . . ", that 

 the upper lip was strongly projecting as in that species. Further distinguished from 

 Pseiidonesimns, Chevr. 1926 by the feebly subchelate 1st gnathopod and the 3rd uropod. 



The other genus to which this form might be run down in Stebbing's key (1906) is 

 Paratryphosites, but the epistome and upper lip are not described, at least not in the 

 works accessible to me. 



Paralysianopsis odhneri, Schell. (Fig. 6). 



Schellenberg, 193 1, p. 7, fig. 2. 

 Barnard, 193 1, p. 425 (A. rhinoceros). 



Occurrence : St. WS 25. South Georgia. 1 $ 6 mm. 



Description. Integument (as preserved) not indurated. Head with anterolateral 

 angle quadrate. Eyes oval, dark. Side-plate 1 parallel-sided, somewhat rounded below; 

 5 evenly bilobed. Postero-inferior angles of pleon segments 1 and 2 quadrate, of seg- 

 ment 3 produced in a rounded lobe. Pleon segment 4 dorsally depressed behind the 



Fig. 6. Paralysianopsis odhneri, Schell. a. Gnathopod 1. b. Peraeopod 3. c. Pleon 

 segments 3-6. d. Telson. e. Uropod 3 /. Profile of epistome and upper lip. 



