SYSTEMATIC REPORT 113 



large, broadly linguiform with broad, truncate apex; lateral margins armed throughout with a regular 

 row of 17-23 strong short spines, which extend to the apex leaving no gap between the lateral and 

 apical spines; distal two or three spines on each side becoming progressively longer, so that the outer- 

 most apical spine forms the natural culmination of a series. The number of lateral spines seems to 

 increase with the growth of the animals, for the immature specimen has but eighteen, while the 

 largest has twenty-three on each side (Fig. 25 E, F); apex armed with five pairs of large spines, which 

 are regularly graduated with the longest on the outer side and the shortest in the middle ; between the 

 innermost pair there is a pair of very small spines but no median plumose setae (Fig. 25 E, F). 

 Length of adult female, 16 mm. 



Fig. 25. Paramblyups brevirostris sp.n. A, anterior end of female in dorsal view, x 20; B, anterior end of immature male in 

 lateral view with thoracic appendages dissected away to expose sternal processes, x 10; C, labium; D, endopod of seventh 

 thoracic appendage, x 16; E, posterior end (telson and uropods) of smallest female in dorsal view, x 20; F, telson of largest 

 female in dorsal view, x 20. 



Remarks. This species can at once be recognized by the short, rectangular rostrum, by the convex, 

 spinulose anterior margins of the eyeplates, the large antennal scale, the large number of spines arming 

 the lateral margins of the telson and by the armature of its apex. 



Distribution. The species has been taken only in the Schollaert Channel in the Palmer Archipelago 

 and is the only representative of the genus to have been recorded from the southern hemisphere. 

 From the character of the thoracic endopods, it would appear to be a bottom-living form, living on 

 mud and this suggestion is borne out by the facts that the specimens are very dirty, and at both 

 stations they were captured in a tow-net attached to a trawl. 



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