NO. 1876. ON THE CRUSTACEAN ORDER CUMACEA—CALMAN. 



645 



produced as a narrow rounded lobe, ischium produced externally into 

 a curved tooth, wider than merus. 



Tke first legs are imperfect in both the specimens examined but the 

 basis appears to have been distinctly longer than the distal segments 

 together and the carpus is more than one-third longer 

 than the propodus. 



In the second pair of legs the carpus is nearly twice 

 as long as the last two segments together. 



In the third and fourth pairs a minute exopod of 

 two segments is present. 



The peduncle of the uropods has a row of rather 

 slender spines on the inner edge; the exopod is half as 

 long as the peduncle and the endopod a little shorter. 



Remarks. — This species bears a somewhat vague re- 

 semblance in the sculpturing of the carapace to the 

 form which Zimmer has figured under the name of 

 Leptostylis manca G. O. Sars/ but it differs too widely 

 in the shortness of the first legs and in many other 

 characters to be identified with that species. The out^ 

 line of the carapace as seen from above has a certain 

 similarity to that of D. hidentata. 



Localities. — Albatross station 2771; east coast of 

 South America; lat. 51° 34' 00" S.; long. 68° 00' 00'' 

 W. ; 50 fathoms; bottom temperature 49.4° F.; 

 U.S.N.M. 44055; 1 female (holotype). 



Albatross station 2778; Straits of Magellan; lat. 53° 01' 00" S 

 long. 70° 42' 15" W.; 61 fathoms; bottom temperature 47.9° F 

 U.S.N.M. 44054;! female. 



Fig. 61.— Diastylis 

 planifrons, fe- 

 male, last so- 

 mite, telson, 

 and ueopod. 



DIASTYLIS NUCELLA, new species. 



Ovigerous female. — Total length, 9.5 mm. 



Cephalothoracic region much mflated, almost globose. Height 

 and width of carapace subequal and about seven-eighths of its length. 



I 



Fig. 62.— Dusttlis nucella, female, from the side. 



The surface is rough with minute granules and there are on the dorsal 

 side three pairs of longitudinal, finely serrate ridges, or, rather, rows 



> Hamb. Magalh. Sammelreise, Cumaceen, p. 8, figs. 11-14. 



