Glossocephalüs Milne-Edwardsi. 107 



shorter than the fifth, which is the longest of all; the sixth and seventh 

 segments are equal in length. The epimerals are long, irregularly 

 rounded below, and fully as long as the under margins of the cor- 

 responding segments. 



The first two pairs of perœopoda are very small in comparison 

 with the following pairs, and have the carpus shaped as an egg with the 

 top obliquely cut off. The carpal process of the first pair is armed 

 on the outer margin with two spine-like teeth, and is sharp-pointed at 

 the apex; the metacarpus is longer than the stem of the carpus; the 

 hind margin is straight, smooth, and sharp, and is longer than the front 

 side of the carpal process; the front margin is convex, with the apex 

 produced into a very short, and feebl}^ curved tooth; the dactylus is 

 smooth on the hind margin, and fully half as long as the metacarpus. 

 The second pair are closely similar to the first, but the outer margin 

 of the carpal process wants teeth; the metacarpus is only a little longer 

 than the stem of the carpus, and has the hind margin concave, smooth, 

 and a little longer than the front side of the carpal process; the dactylus 

 is not more than a third part as long as the metacarpus, and has the hind 

 margin smooth. The third pair are very slender and elongated, more 

 than nine times as long as the second pair, the femur and tibia are much 

 elongated, being more than eight times as long as broad. The fourth 

 pair are like the third, but shorter. The fifth pair have the femur dilated, 

 and not fully three times as long as broad; the front margin is serrated; 

 the tibia is dilated, not twice as long as broad; the carpus is much di- 

 lated, about as broad as the femur, and a little more than twice as long 

 as it is broad at the apex; the metacarpus is dilated, lanceolate, with 

 both margins finely serrated, and is about as long as the carpus ; the 

 dactylus is ver)^ short. The sixth pair are about a fifth part shorter 

 than the fifth pair, and have the femur somewhat narrower; the tibia and 

 carpus are dilated, but not as much as in the preceding pair; the meta- 

 carpus is as long as the two preceding joints together, and is finely 

 serrated on both margins. The femur of the seventh pair is broadly 

 ovate, more than half as long as that of the sixth pair, and about a 

 fourth part longer than all the following joints together. 



The pleon is a little longer than the last three perseonal segments 

 together, and is not carinated. 



The last coalesced ural segment is quite as long as it is broad 

 at the base, and has the margins convex; it is two and a half times as 

 long as the telson. 



