10 



W. :\r. TATTRRSALl.. 



lialf of tlie cxtciior iiiuroin 



■h (.f 



iiiiii'li ot rTmi)lmfr sotio ( 



)ii th 



e inner ( 



listiil 



corner 



liir^ 



1 and wit 111 (Ul 



anterior marmu 



second joiut slightly longer than tl 

 a little oblicjne. 



Antennal peduncle about equal in length to the basal two joints of the anteunnlar 

 peduncle, the third joint only very slightly shorter than the second. 



Antennal scale reaching the centre of the third joint of the anteuuular peduncle, 

 about three times as long as Iwoad, outer margin entire and terminating in a spine, 

 apex broadly rounded ; spine on the outer corner of the basal joint long and slender, 

 extending one-third of the way along the scale, plumose at least on the 

 proximal part. 



The mouth parts (Plate II., Figs. 3, 4, 5) are figured for comparison with those 

 of other species. They do not appear to present any striking peculiarities. 



First tlioracic limb (Plate II., Fig. (5), has the penultimate joint of the endopod 

 longer than either the preceding or ultimate joints ; the latter has the lower margin 

 armed with a row f)f short tine sctiu in addition to the longer ones at the apex. 



Second thoracic limb (Plate II., Fig. 7), with the terminal joint armed with a row of 

 three (sometimes four) short, rather stout and curved spines on the inner face. 



The remaininij thura,cic limbs have the penultimate joint in all cases longer than 

 the ultimate and slightly longer than the antepenultimate. The following tal)lc 

 gives the lengths of the joints of the first six thoracic limits in millimetres and the 

 total length of the limbs from a specimen 27 mm. long. 



Lengths of the joints in mm. 



First j^li'opod of the male (Plate IV., Fig. 10) with both movable processes on the 

 inner plate of the endopod shorter than the plate itself ; distal process feebly curved, 

 bifid at the tip ; proximal process expanded at the tip into two lobes not in the 

 same plane, the outer lobe the larger, and wider than long, the inner lobe but little 

 expanded ; uncinus of the inner plate of the endopod without secondary spinule. 



Telson about one and a half times as long as the last segment of the pleon ; 

 apex acutely pointed ; sul)-apieal spines extending for half their length beyond the 



