422 DE. J. G. DE MAN ON CRUSTACEA CHIEFLY 



of them is placed at the pterygostomian angle. The tapering telson terminates in a 

 long slender tooth, which makes distinct angles with the posterior margin, and this margin 

 is little broader than the tooth is long; of the two movable spines on either side the 

 inner is three times as long as the outer and extends much beyond the median tooth. 

 The rounded, upper surface of the telson carries two pairs of small spinules, the anterior 

 pair somewhat nearer to the proximal than to the distal exti'emity. 



External maxillipeds short, barely reaching beyond the insertion of the antennal 

 pedimcles. Fingers of the first pair of legs shorter than the palm, the latter a little 

 thicker than the carpus. The first joint of the carpus of the second legs is about once 

 and a half as long as the third, and both are a little longer than the second, which is twice 

 as long as the third ; the chela is just as long as the first and the third carpal joints 

 taken together, the fingers being a little longer than the palm. The three other legs are 

 slender and a little setose. The meropodites are armed with a sharp tooth near the distal 

 end of their lower margin ; the propodites carry six or seven movable spinules along the 

 lower edge, which gradually grow longer and stronger towards the distal end ; the 

 slender dactyli, measuring a little more than one-third of the propodites, terminate in 

 two strong claws, which are preceded on their lower margin by six movable sj^inules that 

 diminish in length towards the articulation. So the meropodites of the fifth pair are 

 l"4i mm. long and six times as long as broad ; the carpopodites are a little more than 

 half as long as the meropodites, the propodites as long as the meropodites, but nine times 

 as long as broad in the middle ; the dactyli, finally, are 0'56 mm. long, measuring a 

 little more than one-third of the propodites. 



The ova are numerous, small, 05 mm. long, and once and a half as long as broad. 



Geographical Distribution. — Japan, Kadsiyama {Ortniann); Hakodate, Yokohama 

 [Dofiein). 



Latueutes laminirostris, Ortmann. 

 Latreutes lami7nrostris , Ortmanu, in Spengel, Zool. Jahrb., Syst. v. 1890, p. 506. 



One egg-laden female from the Inland Sea of Japan; deep water. 



As usual, Dr. Ortmann has not mentioned, in the work referred to, the length attained 

 by this remarkable species : the present female is 53 mm. long from the tip of the rostrum 

 to the end of the telson. The rostrum (14 mm.) is one-fourth longer than the carapace 

 (11 mm.). The ta2)ering central axis of the rostrum runs at first straight forward, then 

 slightly upward, whereas the pointed tip is again curved downward. That part of the 

 rostrum which is situated above the central axis, and wiiich is much lower than the 

 inferior part, is slightly arched and carries six small acute equal teeth, four 

 equidistant on the middle and two midway between them and the tip. Ortmann's 

 typical specimen, also a female, w^as armed with nine teeth above. The lower edge 

 carries seven much smaller teeth nearly of the same length, of which the first is situated 

 midway between tlie distal end of the antennular peduncle and the first tooth of the 

 upper edge ; the inferior edge regularly curves, posteriorly, upward toward the central 

 axis. The small spine on the carapace, which is a little larger than the upper teeth 

 of the rostrum, is placed once and a half as far from the posterior border of the carapace 

 as from the first tooth of the upper edge. 



