62 



In the first pleopods the peduncle is fringed with a dozen 

 hooked spines. The male stilet of the second pair is produced 

 considerably beyond the rami. None of the rami show any trans- 

 verse suture. 



Locality: — Specimens were taken at throe stations — Cape St- 

 Blaize . , , • 



W. n^ miles, 2^ fathoms, fine sand; and Cape St. Blaize N-W, 

 3| miles, 33 fathoms^ nuid. 



Miss H. Richardson's genus Colidotea is dis'Oinguished firom 

 Synidotea by having only two joints to the palp of the maxillipeds, 

 and the side-plates distinct and well-de\'eloped in the last three 

 segments of the perseon. The first jointi of the maxilliped palp 

 in S. hirfipes is so faintly marked that in this respect ii may be 

 regarded as a link between the two genera- On the other hand, 

 the side-plates of the perseon segments are scarcely discernible. 



In his key to the species of Synidotea, Dr. Benedict was unable 

 to include iT. hirtipes (Milnc-Edwardsj and the var. laez'idorsalis 

 (Miers), a larger, narrower form from Japan, neither ot uaich 

 he had seen. But he incidentally recognizes thatj they belong ta 

 the first of the two sections into which he divides the genus. 

 Within this section S- hiriipcs makes the nearest] approach to S- 

 laticauda, Benedict, of which Dr. Benedict remarks that " the 

 valves of the operculum are diagonally crossed by a curved line." 

 As already noticed, in S. hirtipes the valves of the opercular 

 uropods are crossed by two such lines. No one observing one of 

 them could well fail to notice the other, so that this 

 may be taken as a distinctive mark separating S. 

 hirtipes from ^S" lal/caiida, which is also a broader form. 

 Miers, it is true, does not make any reference to the second 

 line in S. hiriipcs, but possibly it might not attract 

 attention in the dried specimens which he examined. In the var. 

 lacvidorsalis he figures the opercular valve with only one line 

 which points to the conclusion that this Japanese form is 

 specifically distinct. 



InoTEA ixniCA, Milne-Edwards 



1840. Idotea Iiidica. Milne-Edwards, Hist. Xat. des Crustac^*, 



vol. 3, p. 131. 

 1843. ? Idotea Lafreillii, Gucrin-Meneville, Iconographie du 



Regne Animal, Crustaces, p. jj. 

 1881. Idotea indica, Miers, Journ- Linn- Soc- London, vol. 16, p. 



50, pi. 2, figs. 4, 5. 



This species bears a rather close gcnend resomb'ance to Idotea 



emarginata, Fabricius, but is distinguishable from it by the rather 



■ sinuous and less convergent sides of the telsonic segment, and by 



the side-plates of the perseon. Miers says that these latter parts 



are " small, in the second segmeiU occu])yini;", in a lateral view. 



