LILJEBORGIIDAE 143 



The difference between the three varieties lies in the epistome. It is admittedly very 

 slight, but it exists, and on the material at hand from three different localities it is im- 

 possible to say whether it is a constant or variable feature. In the following species the 

 epistome, while varying slightly as do all parts of an animal when several examples are 

 studied, yet preserves its essential characteristic shape. 



The institution of three varietal names will perhaps be excused for this reason. 



All the specimens, especially those from the more southerly localities, are larger than 

 typical kinahani. 



If the dorsal denticles should prove to be variable it may be possible to include 

 Chevreux's specimens under one or other of the above varieties, with which they 

 conform in having large black eyes. For this latter reason I do not agree with Chevreux 

 in assigning them to consanguinea, Stebb. Schellenberg has named these specimens 

 chevrenxi (193 1, p. 128), and has also described five more species (pp. 129-136), 

 without, however, making reference to the epistome. 



Liljeborgia longicornis (Schell.) (Fig. 82). 

 Schellenberg, 1931, p. 137, fig. 73. 



Occurrence: 1. St. 27. South Georgia. 1 ovig. $ 10-5 mm. 



2. St. 51. Falkland's. 1 $ 18 mm., 3 $? 10, 11 and 17 mm., 1 juv. 5 mm. 



3. St. 144. South Georgia. 2 ovig. $$ 13-5 and 15 mm. 



4. St. 159. South Georgia. 1 mutilated 15 mm. 



5. St. 160. Shag Rocks. 1 <J 13 mm. 



6. St. 170. South Shetlands. 1 ? 16 mm. 



7. St. 195. South Shetlands. 1 $ 9 mm., 1 $ 12 mm. 



Description. In general like fissicornis (M. Sars). Eyes absent. Epistome broadly 

 rounded. Pleon segments 1 and 2 in most 

 of the specimens with a single medio- 

 dorsal tooth, which often has a minute 

 denticle on each side near its base ; in the 

 largest <J and $ from St. 51 these two 

 segments are both tridentate. Pleon seg- 

 ment 3 not dentate, the posterior margin 

 dorso-laterally strongly convex, curving 

 anteriorly to form a narrow V-shaped 

 medio-dorsal excision, into which the 

 tooth on segment 4 fits. Segments 4 and 

 5 each with a strong medio-dorsal carinal 

 tOOth, that on segment 4 the larger, the Fig. 82. Liljeborgia longicornis, Schell. a. Pleon segments 

 keel arising right from base of segment. 2 ~5- b - Profile of epistome and upper lip. c. Gnathopod 



Gnathopods 1 and2in? andimmature ' ' J °' n ° peraeo P° 5o- 

 examples normal, the number of serrations on the fingers increasing apparently with age 

 from 3 to 5 in gnathopod 1, and from 8 to 12 or more in gnathopod 2. Gnathopod 2 in 

 adult <$ with elongate-ovate hand, palm three-quarters length of whole joint, sinuous, 



