AMMOTHEIDAE 



97 



and 2-33 times as long as wide distally. The chela is slightly longer than the scape, the 

 fingers curved and gaping when closed. 



The proboscis is markedly curved and at least as long as the trunk if allowance is 

 made for the curvature. 



A. striata is most nearly related to A. gigantea, n.sp., which also retains the chelate 

 chelophore in the adult. It is easily distinguished from the latter by (i) the rather 

 slender curved proboscis ; (2) the more massive chelophore, with chela even longer than 

 the scape; (3) the absence of large spines on the propodus; and (4) the longer second 

 tibia (see key, and table on p. 99). 



Measurements (mm.) 



Third leg: 



Length of proboscis i5'° + 



Diameter of proboscis ... ... 2-5 



Length of trunk ... ... ... i5"0 



Length of cephalic segment 7-4 



Width of cephalic lobes ... ... 6-7 



Width across second lateral processes 13-3 

 Length of abdomen ... ... ... 4"° 



Distribution. South of Bouvet Island, South Shetlands and South Orkneys. 



Ammothea gigantea, n.sp. (Figs. 46 and 47 a). 



St. 371. 14. iii. 30. I mile E of Montagu Island, South Sandwich Islands, 99-161 m. Large otter 

 trawl: i ovigerous <S (holotype); i c?, overgrown with Polyzoa, Tunicates and Hydroids, i ?. 



Description of holotype. Trunk rather compact, lateral processes separated by 

 narrow intervals— not exceeding half of their own diameter. Transverse body-ridges 



Fig. 46. Ammothea gigantea, n.sp. Lateral view of body with chelophore, palp and oviger: x 2. 

 prominent, rising in the middle Une above the level of the ocular tubercle to blunt, 

 rounded apices. Cephalic segment equal to the sum of the two succeedmg segments. 

 Ocular tubercle small, scarcely higher than wide, tapering abruptly to a pomt above the 

 level of the eyes which are of approximately equal size (Fig. 46). 



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