64 



THE VOYAGE OF H.M.S. CHALLENGER. 



specimens from St. Thomas ; the specimen from Honolulu has the inner spine of the 

 ventral prolongation from the base of the uropod much longer than the outer, while 

 the two spines are of equal length in the two specimens from St. Thomas ; in the 

 specimens from St. Thomas the postero-lateral angles of the fourth, fifth, and sixth 

 abdominal appendages end acutely in spines, while this is the case with the fifth and 

 sixth only in the specimen from Honolulu. In all the specimens the lateral lobes 

 of the last thoracic somite are bidentate. 



Miers is undoubtedly correct in his decision that v. Marten's Pseudosquilla stylifera 

 from Cuba is a Pseudosquilla ciliata, and it is probable that it ranges very widely over 



