LEANDER NATATOR. 143 



Leander celebensis, is also nearly allied to Leander nata- 

 tor M. Eclw. (latirostris de Haan), but in the latter species 

 the rostrum is elevated in its distal extremity, the teeth 

 in the middle of the upper margin longer than the others , 

 (being nearly similar to one another in celebensis), the 

 branchiostegal spine as large as the antennal , the carpus 

 of the legs of the first pair as long as the hand , that of 

 the legs of the second pair also comparatively shorter and 

 the fingers distinctly longer than the palm. In L. latirostris 

 the tarsi are spinulose and the claws less elongated than 

 in our new form. 



L e and e r nat at o r M. Edw. 



Palaemon natator Milne Edwards , Hist. Nat. Crust, t. 

 n, pag. 393. — Heller, Crustac. des südlichen Europa's, 

 pag. 268. — Palaemon latirostris ^ de Haan, Fauna Japo- 

 nica, pag. 170, tab. XLV, fig. 12. 



The Museum collection contains but a few specimens of 

 this very common pelagic species : 



1". A fine female specimen, collected in the Sargasso- 

 sea by Mr. Ottke. 



2". Another fine specimen , collected by Mr. Kruisinga 

 in the Sargasso-sea, at 23° N. L. and 35° W. L. 



3^. A female specimen , found near the island of Wai- 

 geoei by Mr. Bernstein. 



4°. Several specimens from Japan , preserved in spirits , 

 types of Palaemon latirostris de Haan. 



A close investigation has shown me that all these spe- 

 cimens wholly agree with one another in all particulars, 

 so that I can state Pal. latirostris de Haan to be identical 

 with Pal. natator M. Edw. De Haan did not observe the 

 small teeth which are found at the under margia of the 

 rostrum , though hidden by innumerable small hairs : the 

 author of the Fauna Japonica does not appear to have 

 had a specimen of P. natator M. Edw. before him , for he 

 says: Pal. natator M. Edw. affinis videtur. 



Notes from the Leyden Miusevim, Vol. HI. 



