200 BULLETIN MUSEUM Ol COMPARATIVE ZOOL0G1 



striae; these continue above tin- pore, where they are more oblique and more 

 whirls spaced, to the doraun J of tin- uppermost being curved b 



versely across the middorsal region and thui intervening between tlie two 

 tea i' 



Anal aeutum caudally rounded, exoeeded by the vahn \ dves moder- 

 ately oompreeeed, the inner borden not conspicuoualy upraised. Surfai 

 valves and scutum with fine coriarioua lines like those of t be ol ber segment - 



In the gonopods of the male the median piece bai itfl basal part Bubtrianguhur 



with the distal tongue linear, rounded a[)ically. In the telopodite of the 



posterior gonopods the two divisions are slender and nearly equal in length. 

 Number ol segments, forty-two. 

 Length (female), to near 40 mm.; width, to 4.5 mm. 



This species is readily recognized by its small size, few segments and 

 the absence of all scobina. 



582. DlNEMATOCRICUS LEIOR, sp. IIOV. 



Type.— M. C. Z. 4,705. Pakatypes.— M. C. Z. 4,766. Fijis: 

 Taviuni (W. M. Mann). 



This species in coloration resembles D. leuco pie urns in being blackish with 

 a series of light dots along each side of the dorsum and the lower part of the 

 sides and the ventral region paler, light brown to somewhat ferruginous. 

 In the lower light region each segment is darker in front of the suture. Legs 

 fulvous or tinged with ferruginous. Head with a dark angled area between 

 the eyes. 



Sulcus interrupted in frontal region. 



Collum widely rounded below. Exceeded by the second tergite. 



Segments strongly striate up to level of pore; above pore with more widely 

 separated and oblique striae, a few in the middorsal region running transversely 

 on the anterior part of the plate but leaving the posterior part of the mid- 

 dorsal region wholly smooth. No scobina. Anal segment smooth and shin- 

 ing. Valves exceeding the tergite; not compressed or margined. 



The middle plate of the gonopods with base semicircular or rather sub- 

 limate; the distal process longer than the basal region, strongly narrowed 

 proximally, the distal region expanding into a subovate form. Prongs of the 

 telopodite of the posterior pair very unequal; the longer one curved into an 

 oval outline bending back across its own course; the smaller branch fine, 

 closely appressed to the other the middle of which it does not attain. 



Number of segments, forty-two or forty- three. 



Length (female), about 45 mm.; width, 4.5 mm. 



