South African Crustacea. 39 



the hind margin. The three following pairs have short spines on 

 both margins of the fourth, fifth, and sixth joints ; the fifth and sixth 

 are very slender. 



The third nropods end very acutely, the outer branch having, 

 according to Sars, a distinct terminal joint, a character attested in 

 the present species by its flatness and mode of attachment rather 

 than its size. The telson, cleft for seven-ninths of its length, in the 

 preserved specimen was held erect. It is of glass-like transparence, 

 a quality which in other parts of the organism obscui'ed the outlines. 



From the top of the head to the end of the third pleon segment the 

 bent specimen measured a little less than 8 mm. At full stretch it 

 might have been 15 mm. long, with the upper antennae about 5 and 

 the lower 8 mm. in length. 



Locality. 33 9' 30" S., 28 3' 00" E. Depth 47 fathoms. No. 84. 



FAMILY METOPIDAE. 

 GEN. METOPA, Boeck. 



(The family and genus are described in Das Tierreich, Lief. 21, 

 pp. 171, 172, 724.) 



METOPA ROTUNDUS, n. sp. 

 Plate XCVlB. 



The specimen, a female with some well-advanced young, in its 

 firmly rounded position measured not more than 3 mm. in a straight 

 line from the head to the third pleon-segment, the depth at the fourth 

 side-plate being about 2 mm. 



The eye is round, of moderate size. The antennae in both pairs 

 have the flagella shorter than the peduncles, tapering, seven- or 

 eight-jointed ; the first joint of the peduncle in the first pair longer 

 than the second and third joints combined, the last joint in the second 

 pair only slightly shorter than the penultimate. 



The upper lip is more unequally bilobed than that of Metopa alderii 

 (Bate) as figured by Sars, nor does the mandible show the spine-row 

 which Sars figures for that species. The maxillae and inaxillipeds 

 appear to agree with those of the species named. 



In the first gnathopods the sides of the hand are parallel as far as 

 the commencement of the oblique palm, over which the smooth 

 finger bends, only the extreme tip overlapping it. The fifth joint is 

 wider but little longer than the hand. The second guathopod is far 

 more robust, the wrist broader than long, the hand massive, with a 



