140 



to the base of notch of the first; it is distally obliquely 

 truncated, and has below a very prominent and acute keel. 

 The third joint is very slender, and shorter than the second, 

 and is articulated to it in a small cavity. The slender 

 flagellum has about 24 joints. The flagellum of the antenna 

 has from 26-32 joints. 



In the right mandible the spine row is well developed, 

 consisting of 7-8 coarsely pectinate spines; a small tubercle 

 faintly toothed lies between these and the molar tubercle, 

 which is well developed; the incisory plate is distally entire. 

 The left mandible has a secondary plate divided into three 

 teeth. The first two joints of the palp are subequal in 

 length. 



The maxillae and maxillipeds are of the usual type. 

 The lobes of the palp of the maxillipeds are long, with their 

 setae well developed. 



The first gnathopods are robust, the basis subequal in 

 length to the two following joints, tak6n together, the 

 fourth, fifth, and sixth joints are posteriorly spined. The 

 dactylus is rather long, robust, and two-clawed. The legs 

 following the first pair are sparely spined; the pads, so 

 much in evidence in other species of this family, are here 

 represented by soft plumose setae. 



The sternal filaments of the male are rather long. Tlie 

 o'p'pendix masculina is longer than the ramus which bears it, 

 and is very slender. The exopods of the third, fourth, and 

 fifth pleopods have each a division; a few distal setse are 

 on the exopods of the fourth pleopods. 



The uropods are long and slender; the peduncle has a 

 small spine below the insertion of the outer ramus; the outer 

 ramus is narrow lanceolate, and reaches beyond the inner 

 ramus; the inner ramus is also narrow, carinate below, with 

 the inner margin slightly curved, reaching beyond the ter- 

 minal spine of the pleon. The margins of the uropods and 

 pleon are sparingly clothed with very short hairs. 



The female does not differ from the male in any note- 

 worthy respect, except, of course, when bearing young; then 

 the mouth parts and viscera are modified in the usual way. 

 In what appears to be an old fem.ale there are no ova or 

 young, but there are the remains of marsupial plates; the 

 viscera seem to have disappeared, as the sternites are sunken 

 in or wanting; the pleopods, however, are intact. 



Cymodoce tuberculosa, Stebbing. 

 Plate iii., figs. 12 to 15. 

 The epistome has two projecting teeth transversely placed 

 on the anterior portion, similar to the rostral teeth, and in- 

 clined to be bifid. 



