1\8S ■ ■ ■ MR. G. P. FARRAN ON 



2nd foot: ^xopodite three-jointed with 1.1,3 outer edge spiiies 

 and 1.1.5 inner edge setse, inner edge seta on 1st joint very 

 small, terminal spine shorter than the exopodite ; endopodite 

 three-jointed with 1.2.4 inner edge and 0.0.1 outer edge setse ; 

 outer edge seta present on 2nd basal, not seen on 3rd and 4th 

 feet. 



I 8rd foot (PL XXIX. fig. 13) similar to 2nd except for absence 

 of outer edge seta on 2nd basal. : 



4th foot (PI. XXIX. fig. 14) : exopodite with 1.1.3 outer edge 

 spines and 1.^.5 inner edge seta3 ; the most distal outer edge 

 spine is well developed, the others being small and slender ; 

 inner edge seta on first joint very small ; ter-minal spine shorter 

 than the exopodite ; endopodite with 1.2.3 inner edge and 

 0,0.1 outer edge setse. 



5th f e.et very small but appear to be of the usual form with 

 one terminal and one basal seta. 



Occurred in two gatherings, about twenty specimens. 

 ; In these gatherings it could be recognised by its small size and 

 the shortness of the anal segment, less than the furca. 



■ OlTHONA OCULATA, sp, n, (PI. XXX. figs. 8, 9 ; PI. XXXI. 



figs. 2-9.) 



Female (PL XXXI. figs. 2, 3). — Length -9 mm. ; cephalothorax 

 •54 mm. ; abdomen (including Th. 5) '36 mm. ; proportional lengths 

 of abdominal segments and furca 7 : 18 : 10 : 9 : 8 : 8 ; f ureal rami 

 about two and a half times as long as wide, with an outer edge 

 seta situated in the middle of the outer margin. Rostrum absent, 

 ceplialoa slightly produced into a rostral prominence in front of 

 tlie antennas. The cephalic ganglia form a large bilobed mass, in 

 front of which are situated, in the rostral prominence, a pair of 

 small clear refractive areas. 



1st antenna (PL XXXI. fig. 4) reaches to the 2nd thoracic 

 segment ; proportional lengths of joints : 



128 4 5 6 7 8 9 10 11 1 2 

 11 6 16 11 12 12 16 7 13 4 9 6' 



3rd joint with an imperfect jointing near its proximal end, 

 ,4th joint with a small spine distally on its upper margin. 



2nd antenna of the usual form. 



Mandible (PL XXXI. fig. 5): 2nd basal with two terminal 

 (inner edge) spines and a small seta on its lower (inner) margin 

 opposite the endopodite ; endopodite sloped outwards, with three 

 terminal and two inner edge setee : exopodite with two terminal 

 and three inner edge setse. 



1st maxilla (PL XXXI. fig, 6) : 1st inner lobe well developed^ 

 of the usual form, 2nd inner lobe with one strong seta, 3rd inner 

 lobe with three terminal and one lateral setfe ; endopodite mode^ 

 rately large, bent outwards, with two lateral and two terminal 

 setse; exopodite large, with four terminal sette, the outermost 

 being slightly the largest. ....-.■ 



