144 



T. FUKUDA. 



between them being uneven. The submedian carina; are parallel 

 and broad ; the intermediate carina; divergent, with their cuds 

 scarcely reaching the posterior margin ; the lateral carina; run nearly 

 parallel to the latter. All carina; are devoid of spines at their ex- 

 tremities. 



The telson is a little longer than broad, the maximum length 

 being 2/15 the total length; the vertical diameter exceeds half the 

 horizontal diameter as in G. spinosus Bigelow. The whole dorsal 

 surface except on the submedian spines, is completely covered with 

 nine broad longitudinal carina;, of which the median one is the 

 broadest. In the median carina three parts are recognizable : a 

 prominent smooth part on the median line and a pair of spinulated 

 parts lying postero-lateral to the former. This carina alone reaches 

 the base of the median notch posteriorly, the others stopping at some 

 distance in front of its margin. The next three pairs, of which the 

 inner two unite posteriorly, are nearly equal in breadth. The marginal 

 carina is the narrowest and is shorter than the others. All these 

 carinas are smooth except at the lateral borders where they are 

 provided each with a row of minute prickles. The posterior end of 

 the carina; is also armed with a few spinules directed obliquely back- 

 ward. The postero-lateral margins of telson are divided each into 

 three teeth, though at first sight they appear to be simple. The 

 outermost tooth is the end of the marginal carina, the intermediate 

 that of the laterial, while the innermost tooth represents the submedian 

 spine. The last mentioned is the only well developed marginal spine, 

 having no carina upon it and the movable tip being directed upward. 

 The lateral margins of the large triangular median notch are armed 

 each with thirteen minute spinules. Besides, there is a spinule on the 

 outer margin of the submedian spine. 



The basal segment of uropod bears on the dorsal surface a row 

 of three or four spines besides the terminal one. The outer spine of 

 the basal prolongation is broad and flattened, curved inward, and has 



