BAHAMA CRUSTACEA. 245 



54. Leander northropi n. sp. (PL xxx, Fig. 4). 



{a) I specimen. Nassau, N. P., Jan., 1890. 



A single specimen with a total length of 30 mm. Length 

 of cephalothorax to tip of rostrum 11.5 mm. 



Cephalothorax Avith small tooth below orbit and a very 

 minute tooth below this and a little back from the anterior 

 margin on the lateral surface. 



Length of rostrum to posterior end of orbit 7 mm., slightly 

 curved upwards toward apex. Ten teeth above, /<?2/r below ; the 

 first dorsal tooth forms with the tip of rostrum a bifid extremity. 

 A long interval between first and second tooth ; interval between 

 second and third one-third the length of that between first and 

 second ; fourth, fifth and sixth teeth follow at slightly diminish- 

 ing intervals, the sixth being over the posterior part of orbit of 

 eye. SeventJi, eigJith and ninth teeth close together, posterior to 

 orbit of eye. 



The first ventral tooth is a little in front of second dorsal, 

 second ventral below second dorsal ; third and fourth at equal 

 intervals between second ventral and orbit of eye. 



Inner antennae : Peduncle reaches beyond second ventral 

 tooth of rostrum ; proximal segment about equal to the two 

 distal. Upper flagellum bifid ; united proximal portion of i 4 

 segments ; the shorter branch has 1 2 segments ; united there- 

 fore for more than half its length. The longer branch reaches 

 beyond the undivided flagellum. 



Outer antennae : Scaphocerite with lamellar portion slightly 

 longer than spinose, reaches beyond first ventral tooth of ros- 

 trum ; flagellum exceeds the length of the body. 



Third pair maxillipedes reach to end of peduncle of inner an- 

 tennae. 



First and second pereiopods : Long, slender and chelate ; 

 second longer than first ; chela in second as long as carpus. 

 Third and fourth pereiopods terminate in claws. 



Pleopods, biramous, setose. Telson, lanceolate, 4 mm. 

 long, noticeably shorter than uropods, distal extremity with 

 two sharp spines. Outer uropod imperfectly divided trans- 

 versely, the proximal division ending in a lateral spine. 



Annals N. Y. Acad. Sci., XI, August 13, 1898 — 17. 



