79 



shape and size to those of the second segment, but com- 

 posed of five joints, the coxae being soldered to the seg- 

 ments to which they are attached. The tail is very 

 minute and rudimental : on its underside in the male are 

 perceived two pairs of slender, deflexed, horny append- 

 ages ; each of the two preceding segments being armed on 

 the ventral surface with a pair of strong spines. In the 

 female the antepenultimate segment of the body is fur- 

 nished on its under-surface with two small transverse 

 valves, uniting into a tubercle, which closes the orifice of 

 the generative organs. 



The analogy which these animals exhibit with the 

 Pediculi among hexapod insects, and with Pycnogonum 

 amongst the Arachnida, merits attention. 



MEN TARRING A BOAT. 



