ON SOME EUROPEAN SPECIES OF THE GENUS LEANDER 



DESM,, ALSO A CONTRTBUTION TO THE EAUNA 



OF DUTCH WATERS. 



Dr. J. G. DE MAN, 



of' lersoke. 



(With pi. X— XII). 



L Introdnefioii. 



In tho course of last ycar, in February and in June, oven 

 ali-eady in the aiitumn of 1913, numerous specimens of a species 

 of Leander Desm. were broug-ht to me by a fisherman of lerseke: 

 these slirinips, that I had never seen before, had been captured 

 in the salt water of the „Oosterschelde" (Eastern Sheldt), near 

 the eastern extremity of the isle of North Beveland. By means 

 of Mr. Stanley Kemp's valiiable paper „The Decapoda Natantia 

 of the Coasts of Ireland", published in 1910, in which this 

 author also mentions Dr. Calman's interesting observation of the 

 niandibnlar palp being two-jointed in L. Squilla and three-jointcd 

 in tlie other forms, I soon succeeded in determining this species, 

 which proved to be the trne Leander Squilht (Linné). 



Other results of my investigations were not only the fact that 

 this species had never before been observed on the coasts of Hol- 

 land, bnt also that it is quite difterent from another species which 

 is very common in the „Hollandsch Diep", the estuary of the 

 river Meuse, and which, in 1887, has been referred to L. Squilla 

 \)\ tlie late Dr. P. P. C. Hoek, our much lamented, learned 



