Cerapus^ Vnciola^ and Lcpidactylis. 2Y3 



thirds of the inner and tlie whole of the outer margin are furnished 

 with plumose setie which are longest at the tip of the lamella and 

 very thickly crow ded on the proximal part of the outer margin. The 

 second pair (figure 5, h) are very much smaller : the base is little 

 more than half as long as in the first pair ; the outer lamella is less 

 than two-thirds as long as in the first pair, ovate, half as broad as 

 long, and both margins are furnished with plumose setae ; the inner 

 lamella is rudimentary, about half as long as the outer and furnished 

 wdth only two small seta3 at the tip and two or three more on the dis- 

 tal part of the inner margin. The third pair (figure 5, c) are still 

 smaller : the outer ramus is about two-thirds as long as in the second 

 pair, ovate, and margined with a few plumose setae distally ; the inner 

 is about half as long as the outer, and has only two or three setae 

 near the tip. 



The fourth, fifth and sixth segments of the pleon are much shorter 

 than the first three. As seen from above (Plate Ila, figure 6), the 

 fourth segment is nearly as long as broad ; the fifth is a little nar- 

 rower and not half as long as the fourth, being between three and 

 four times as broad as long ; the sixth segment is slightly narrower 

 than the fifth, nearly twice as broad as long, and appears to be par- 

 tially consolidated with the fifth. 



The first pair of uropods (Plate Ila, figure 6) are well developed : 

 the bases are stout and reach to the base of the telson ; the outer ra- 

 mus is narrow, shorter than the peduncle, minittely serrate and 

 sparcely setigerous along the outer edge, and tipped with a slender 

 spine ; the inner ramus is smaller than the outer, about three-fourths 

 as long, and tipped with a spine, but the edges unarmed. The sec- 

 ond uropods are small, slender and uniramous : the base is about as 

 stout as the outer ramus of the first pair, does not quite reach the 

 base of the telson, and is unarmed ; the terminal segment is very 

 short, stout and hooked, and very similar in structure to the terminal 

 segments of the third uropods and the dactyli of the third, fourth and 

 fifth peraeopods. The third uropods are like the second, but the 

 bases are much stouter and each is armed with a short seta on the 

 inner edge. The telson is about twice as broad as long and bilobed 

 at the exti'emity, the lobes being broadly rounded and armed with 

 two or three transverse rows of hooked spines above. 



In life, a large portion of the animal appears almost black from the 

 crowding together of numerous specks of very dark purplish pig- 

 ment. The first segment of the peduncle of the antennula is nearly all 

 colored in this wav and there is a broad band of the same character 



