KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. N:0 3. 



5 



I give a drawing (fig. 1 a) of the fifth peraeopod which was imperfect in the type 

 specimen. 



The third uropod has the basal joint cylindrical, longer than the single ramus 

 that is present, and provided with tufts of setules; the ramus is triangulär and ends 

 acutely. The other ramus is wanting, as in the type specimen and in those of P. 

 herdmanni examined by Walker; it is probably large and easily detached. Walker 

 supposes the missing ramus to be the inner one; it is difficult to be certain on this 

 point but I am inclined to think it is the outer one that is missing. 



Fig. 1. Platyischnopus mirabilis Stebbino, female. a. Fifth peraeopod. b. Side view of end of 

 pleon and uropoda. c. First uropod. d. Second uropod. e. Third uropod, basal joint and(?) 



inner ramus. /. Telson. 



I give figures of the uropoda, telson, etc. for comparison with those given by 

 Stebbing and Walker. 



Barnard has recorded the species from Saldanha Bay, South Africa. 



Distribution. N. W. Australia; Port Jackson, New South Wales; Bahia, South 

 America; Saldanha Bay, South Africa. 



Another species, P. herd?nanni, from Ceylon was added to this curious genus 

 by Walker (1904, p. 24). While certainly coming under the genus it differs, as 

 Walker pointed out, »in the sculpture of the last [third] pleon segment, the absence 

 of eyes, the proportions and armature of the antennae, form of the telson, etc». 

 Walker had several specimens and was hence able to point out that the male differs 

 markedly from the female in the first antennae which have the first joint of the 



