150 " THETIS " SCIENTIFIC RESULTS. 



spine, which is situated at the apex of the infero-lateral process of 

 the front. 



Outer orbital angle defined by a small spine. Upper margin 

 of orbit with two shallow notches, outer two- thirds smooth, the 

 inner third bears a few granules ; lower orbital border with six 

 or seven subspiniform granules, of which the innermost is large 

 and visible from above. 



Anterior lateral margin armed with four spines ; the first is 

 seated on the subhepatic region, and is rather nearer to the orbital 

 spine than to the second, its inferior base is slightly granulose ; 

 the second spine is compressed, acute, and often has one or two 

 granules immediately behind the apex ; third and fourth spines 

 smooth, conical and acute. 



Chelipedes robust, unequal, either left or right the larger ; 

 anterior angle of ischium joint subacute and granulose ; merus 

 trigonus, broader than long ; surfaces smooth, punctate, glossy 

 and sparsely hairy ; inferior angle rounded, superior acute, 

 granulose, and armed distally by two spines, one terminal and the 

 other posterior to a deep transverse gi-oove. 



Carpus as long as broad, equal to the merus in length, armed 

 on the external and superior surfaces with from twelve to twenty 

 spines, which are a little higher than broad at the base ; they 

 arise from small mound-like elevations, giving the surface a some- 

 what uneven aspect, and there is a moderate sized spine at the 

 intero-distal angle. 



Lower margin of larger hand twice as long as the upper, and 

 equal to the depth of the palm at the base of the fingers : inner 

 surface of the palm smooth, convex centrally, and excavated at 

 the base proximally. Crest of upper border with five spines, the 

 two anterior are in contact at the base ; upper surface spinose ; 

 the lower and distal external surfaces bear numerous subspiniform 

 granules ; an oblique line drawn from the base of the mobile 

 finger to the lower articulation of the palm would separate the 

 spines from the granules, which gradually diminish in size 

 towards the lower border, the distal third of which is smooth. 



Fingers dark brown, the colour being confined to their surfaces ; 

 their inner edges bear three or four denticles, those on the lower 

 being slightly the larger ; the denticles and tips of the fingers are 

 whitish in colour ; the lower finger has both surfaces grooved, 

 l)ut the upper is grooved externally only. 



Anterior surfaces of the meral and carpal joints of the ambula- 

 tory legs punctate, smooth ; posterior surfaces and the rest of the 

 joints beset with longish hairs. Merus joint trigonus, as long as 

 tlie inferior borders of the carpus and propodus, that of the first 



