162 ALKPAS MINUTA. 



jections. Length of the largest specimen, about one fourth 

 of an inch. Colour, according to A. Costa in the work 

 above cited, " rufo-flava vittata;' but after spirits the 

 whole becomes uniformly yellowish. 



Filamentary Appendages, situated beneath the basal 

 articulation of the first cirrus, on the posterior edge of 

 the usual enlargement ; acuminated, about two thirds of 

 the length of the shorter ramus of the first cirrus. 



Prosoma well developed. 



Mouth. — On each side there are two slight promi- 

 nences; one under the mandibles, the other transverse 

 nearer to the adductor muscle. 



Zabrum, placed near the adductor muscle, with the 

 upper part not more bullate than the lower part ; crest 

 with a row of blunt teeth, and many fine bristles growing 

 chiefly outside the teeth ; there are many fine bristles 

 on the inner or supra-cesophageal fold of the labruni. 



Palpi not nearly touching each other, pointing towards 

 the adductor: much hollowed out on their inner sides, hence 

 narrow and acuminated, with doubly serrated bristles. 



Mandibles, with three teeth and the inferior angle 

 ending in a single sharp spine ; whole inferior portion 

 narrow ; first tooth as far from the second, as the latter 

 from the inferior angle ; owing to the presence of short 

 thick spines projecting from the sides of the jaw, the lower 

 edges of the second and third teeth appear pectinated. 



Maxilla, nearly two thirds of the width of the man- 

 dibles ; beneath the three larger upper spines there is a 

 considerable notch, and the whole lower part is very 

 slightly upraised ; edge irregular, with obscure traces of 

 either two projections, or perhaps of four steps. 



Outer Maxillce, with bristles in front continuous; 

 exteriorly there is a slight prominence near each olfactory 

 orifice, with a tuft of long bristles. 



Cirri not much elongated ; first pair placed not quite 

 close to the second ; five posterior cirri nearly equal in 

 length ; pedicels long, with irregularly scattered spines, — 

 those on the pedicel of the first cirrus beautifully and 



