I. '21. 22 



to examine the first left walking leg is missing, but it probably 

 resembles in all respects its right neighbour, as Milne-Edwards 

 and Bouvier, who note the peculiar structure of the second 

 left walking leg, make no remark on it. 



In the second right walking leg there are no teeth on the 

 lower edge of the merus, the teeth on the carpus are reduced 

 to one or two at the distal end, and the teeth on the upper 

 edge of the propodite are obsolete. 



In the second left walking leg the lower edge of the merus 

 bears no teeth ; on the upper edge of the carpus there are 

 about five teeth, the distal one the largest ; the upper edge of 

 of the propodite has no teeth, but there is a row of six or seven 

 on the distal half of the lower edge. On the lower edge of the 

 dactyl there is the usual row of slender spines leading up to 

 the terminal claw, but, in addition to this, there is on the same 

 edge, and further towards the outside, a row of short thick 

 teeth, about thirteen in number, extending from the proximal 

 end of the joint about two-thirds of the way to the tip and 

 decreasing in size distally. 



The fourth pereiopods are, as usual, imperfectly chelate. 

 The dactyl ends in a long hyaline claw. The imbricate area 

 is fairly broad. 



The pereiopods of the fifth pair end in minute chelae as in 

 the other species of the group. 



There are four unpaired pleopods on the left side in both 

 male and female. Of these the last is much feebler than the 

 others. 



Size : — The carapace of the Naples specimen, from which the 

 foregoing description is taken, measures 8-5 mm. In Chevreux 

 and Bouvier 's specimen the carapace was 8-8 mm. long. 



General Distribution : — The centre of distribution of this 

 species seems to be the Mediterranean, where it has been taken 

 at many localities by Lucas and others. It also occurs plenti- 

 fully in the Adriatic (Heller). Outside the Mediterranean 

 it extends southwards along the west coast of Morocco and 

 the Soudan to Goree Bay just south of Cape Verde (Chevreux 

 and Bouvier). It occurs at the Canaries and at Madeira 

 (Milne-Edwards and Bouvier). To the north it has been 

 taken in the outer western part of the English Channel 

 (Crawshay), and near Falmouth (Bell). There is also a record, 

 which Henderson (1886) regards as extremely doubtful, from 

 the Firth of Forth. 



Vertical Distribution. — The depths at which this species has 

 been taken range from 8 fms. at Goree Bay to 100 fms. at the 

 Canaries. In the Adriatic it is found in depths of 20-30 fms., 

 and in the outer part of the English Channel in 42-51 fms. It 

 may therefore be regarded as essentially a shallow-water species. 



Irish Distribution. — The only Irish record of the species is 

 one by Melville (1860) from 60 fms., just south of the Aran 

 Islands. 



The species has not been taken by the Helga. 



