308 DR THOMAS SCOTT ON THE 



is armed with elongated and tolerably stout terminal claws, and the seta^ on its outer 

 margin and apex are also elongated ; the first joint of the inner ramus reaches to near 

 the end of the second joint of the outer one ; the end joints are small and the apical 

 claws elongated ; there is also a fringe of minute spines along the outer margin in both 

 rami (lig. 12). The second, third, and fourth pairs are nearly as in Parathalestris 

 clausi (Norman). 



The fifth pair are broadly foliaceous, and both segments are furnished with several 

 spines, all of which are tolerably stout, except the one at the outer distal angle of the 

 inner segment, and the apical one on the outer segment, as shown in the figure (fig. 15). 



Habitat. — Scotia Bay, South Orkneys; collected in June 1903; Station 325, 

 60° 43' 42" S., 44° 38' 33" W. Only a few specimens were observed ; they were in 

 some material washed from zoophytes brought in the trawl-net or dredge. 



This species is named in honour of the late Mr James Coats, junior, and of Major 

 Andrew Coats, D.S.O., who were the two chief subscribers to the Expedition. Major 

 Coats is also a member of the Scotia Committee. 



Parathalestris affinis, new species. (PI. III. figs. 17-25.) 



Female. — In its general appearance, and also in the structure of some of its 

 appendages, the female of this species is not unlike that of Parathalestris jacksoni 

 (T. Scott), recorded from Franz Josef Land, except that the caudal rami are short. 

 The body is elongated, tolerably stout, and tapers slightly towards the posterior end, 

 and the integument is strongly chitinous. Head rounded and furnished with a small 

 rostrum. Caudal rami short, their length aliout equal to that of the last segment of the 

 abdomen (fig. 17). Length of the specimen represented by the figure about \'b mm. 



Antennules short, and composed of nine articulations ; the first four joints are 

 moderately large, and the upper distal portion of the fourth joint extends forward to 

 near the middle of the next one and carries a tolerably long and stout sensory filament ; 

 the sixth joint is rather longer than the preceding one, while the seventh and eighth, 

 which are subequal, are shorter than any of the others ; the end joint is about one and 

 a half times the length of that which pi-ecedes it ; all the joints except the first are 

 moderately setiferous (fig. 18). Antennae with the outer ramus small and biarticulate. 



Mandibles slender and becoming attenuated towards the distal end. Maxillae 

 strongly developed, the truncated masticatory part armed with several spiniform setas 

 and extending rather beyond the supplementary lobes (fig. 21). 



Maxillipeds small ; the second pair short, but with the end joint dilated and armed 

 with a short and rather stout and curved terminal claw (fig. 23). 



The first pair of thoracic legs have the inner ramus rather shorter than the outer, 

 and provided with long, terminal, claw-like spines ; the end joint of the outer ramus 

 is also armed with several claw-like spines somewhat similar to those of the inner 

 ramus, and an elongated seta sjwings from its inner distal angle ; the second joint of 

 the same ramus has also its outer margin fringed with minute teeth as far forward as 



(roy. soc. edin. trans., vol. xlviii., .5.54.) 



