Crustacea Stomatopoda of the Indo-Pacific Region. 



107 



1913.] vS. Kemp 



The peduncular segment of the uropods is externally ridged, but does not possess 

 a spine at the distal end of the upper margin. The ventral process is strikingly different 

 from that of any other known Stomatopod. It terminates in a stout tooth, homologous 

 with the inner one of the two found in P. ciliata, and the external margin behind the 

 apex of this tooth is convex and is continued evenly backwards to the point of articu- 

 lation of the exopod, on this margin near its distal end is found a minute spinule 

 representing the outer tooth of P. ciliata and the other species. The internal margin of 

 the process is smooth. l The basal segment of the exopodite is extremely short and bears 

 four or five mobile spines on its external margin, the outermost much the longest. 

 Both the endopod and ultimate segment of the exopod are very large and broadly 

 expanded ; the latter is fully two and a half times the length of the proximal seg- 

 ment (fig. -85). 



The colouring of spirit specimens is not characteristic ; Whitelegge notes that the 

 outer laminae of the uropods are brilliant violet in living examples. 



In two large specimens from the Australian coast the mandibular palp is two- 

 jointed 2 and there are two prominent lobes between the submedian and intermediate 



Pseudosquilla stylifera. Last abdominal somite, telson and uropods of an Australian specimen. 



marginal teeth of the telson (see text-fig.). In a slightly smaller example from Chili 

 there is only a single intermediate lobe on the telson (fig. 85), and the mandibular palp 

 is composed of three quite distinct joints. 



Both Milne-Edwards and Bigelow,in their figures of S. American specimens, show 

 only a single intermediate lobe on the telson ; but Whitelegge does not mention the 

 existence of two in the examples which he records from New South Wales, while Milne- 

 Edwards figures the mandibular palp of a Chilian example in one case with two seg- 

 ments (1837, pl- 27, fig. 10), and in another with only a single segment {ibid., fig. 11). 



There can be little doubt that the Australian and American specimens both belong 

 to the same species, for, with the exception of the two characters noticed above, the 

 examples from the two localities are, as nearly as possible, identical. The distinction 

 in the number of segments in the mandibular palp is consequently the more remarkable, 



1 Miers states, perhaps in error, that this margin is denticulated. 



a The two distal segments of the normal three-segmented palp are fused. 



