316 ME. E. J. MIEES'S EEVISION OF THE HIPPIDEA. 



many other southern species, is restricted by the extreme cold of 

 the winters*. 



He states, moreover, that H. talpoidea lives gregariously, 

 burrowing in the loose and changing sands at or very near low- 

 water mark, but that it is occasionally found swimming about in 

 pools left by the tide, and when undisturbed sometimes comes 

 out and swims in the same way along the shore, although pro- 

 bably never venturing far from the bottom. 



It may be noted that Dana found his specimens of i2. hirtipes 

 swimming along the sandy bottom in shallow waters, near the 

 shores of a small island off Soung, the principal harbour of the 

 Sooloo Islands. Occasionally, however, these animals are col- 

 lected at greater depths. Thus Lucas collected his specimens of 

 Albunea guerinii at depths of 16-21 fathoms in the Grulf of 

 Algiers ; and Mastigochirus gracilis, Stimpson, was collected 

 on a shelly bottom at a depth of 20 fathoms, at the island of 

 Ousima. So also specimens of the rare Blepharopoda spinimana 

 in the British-Museum collection were obtained by fishermen in 

 deep water in the Bay of Valparaiso. 



Tam. HipPiDiE. 



Hippidae, Stimpson, Proc. Ac. Nat. Sci. Phil. p. 229 (1858). 



Anterior legs not subcheliform. Antennae with the accessory 

 joint minute or obsolete. Third maxillipedes suboperculiform, the 

 third* joint greatly enlarged and without an exognath ; last tail- 

 segment greatly elongated, lanceolate, and acute at the extremity. 



Bemipes. 



Remipes, Latr, Gen. Crust, et Ins. p. 45 (1806); M.-Edw. Hist. Nat. 

 Crust, ii. p. 204 (1837) ; Stimpson, Proc. Ac. Nat. Sci. Phil. p. 229 

 (1803). 



Antennules of moderate length. Antennae very short. Third 

 maxillipedes with the last joint somewhat unguiform. First legs 

 elongated, subcylindrical, robust ; the last joint not annulated, 

 styliform, similar to the preceding. 



Eemipes testtjdinaeius. PL V. fig. 1. 



? Hippa adactyla, Fabr. Ent. Syst. ii. p. 474 (1793), Suppl. p. 370 

 (1798) ; Latr. Hist. Nat. Crust, vi. p. 176 (1803). 



* The advance northwards of species common to the east coast of North 

 America is probably checked by the cold Arctic current which impinges on the 

 shores of the United States and flows southwards between the coast and the 

 warm waters of the Gulf Stream ? — Editor. 



