228 



DISCOVERY REPORTS 



lacks the marginal corrugations ; the telson has two spines as well as the two bands of 

 spinules. 



Remarks. The two spines on the telson are also present in the 6* ; I find on re-examina- 

 tion of the slide of the type specimen that they were there, but being much smaller than 

 in the present specimens were overlooked. The postero-inferior angle of pleon segment 3 

 is more rounded-quadrate than merely rounded. The 2nd joint of gnathopod 2 is 

 shallowly channelled in front, and the keels not prominently lobed distally. 



The colour of no. 1 was noted as being " deep canary-yellow above, paler at the sides ", 

 and that of no. 2 as "entire body very bright canary-yellow, appendages pale yellow, 

 eyes black". 



Distribution. Off Cape Adare, 82-92 m. 



Eurystheus serricrus, n.sp. (Fig. 142). 



Occurrence: 1. St. 123. South Georgia. 1 $ 10 mm. 



2. St. 140. South Georgia. 2 $? 8 and 11-5 mm., the larger ovig. Type $. 



3. St. 170. South Shetlands. 3 <$<$ 12 mm. Type $. 



Description. Rostrum obsolete. Eyes oval-reniform. Ocular angle of head shortly 

 acute, post-antennal angle quadrate. Peraeon and pleon smooth, except for a small sub- 

 dorsal denticle on either side on pleon segments 4 and 5, better developed in $ than in 



Fig. 142. Eurystheus serricrus, n.sp. a. Gnathopod 2'+. b. Gnathopod 2<J (inner view), c. Gnathopod 2<J 

 (outer side, viewed obliquely from above), d. Pleon segments 4-6 and telson. e. Lateral view of telson (dotted 

 line indicates level of median line). 



$ ; on inner side of each denticle a small seta. Side-plates 1-4 not serrate, 2 longer than 

 deep in <S, about as deep as long in $. Postero-inferior angle of pleon segment 2 

 rounded-quadrate, of 3 rounded with a slight indent above the corner (cf. Schellenberg, 

 1926, fig. 62). Telson pentagonal, dorsal surface concave, lateral angles strongly raised 



