150 



4 adiilt egg-bearing females obtained Jiily 1899 in the Hol- 

 landsch Diep and presented bij the late Dr. P. P. C. Hoek. 



53 specimens (26 cT , 27 9, among whieh 12 are ova-bearing) 

 collected in 1886 in the HoUandsch Diep and presented to me 

 in 1902 by Dr. P. P. C. Hoek sub nomine Pal Squilla. 



20 specimens of medium size or young, without eggs, collected 

 August 1906 in the river Schelde (Sheldt) near Antwerp, received 

 from the Royal Zoological Museum at Brussels. 



4 specimens of medium size from the river Schelde (Sheldt) 

 near Santvliet, received from the Museum at Brussels. 



2 specimens, one of which is nearly adult, from the river 

 Schelde (Sheldt), received from the same Museum. 



3 specimens (2 cT, 19 without eggs) from the river Schelde 

 (Sheldt), presented by Prof. Gr. Gilson of Brussels. 



12 young specimens from the river Schelde (Sheldt) near Ant- 

 werp, presented by Prof. Gr. Gilson in 1906. 



1 young female, without eggs, collected by myself, December 1900, 

 off the West Coast of the Isle of Walcheren, at a depth of 1 1 fathoms. 



1 female of medium size, without eggs, from Biarritz, France, 

 collected May 1903 and presented to me by Mr. A. O. Walker, 

 sub nomine L. squilla (hvs^.). 



As far as I am aware, Leander longirostris (H. M.-Ed\v.) has 

 not yet been recorded from north of the isle of Noirmoutier on the 

 West Coast of France. This species, however, has already been 

 captured in 1886 by Dr. P. P. C. Hoek in the Haringvliet 

 and the HoUandsch Diep, and in the quoted paper of 1887 

 lie writes that this shrimp ascends the river New Merwede as 

 far as the Ottersluis, near Werkendam ; this species, however, was 

 referred by Hoek, though with some hesitation, to L. Squilla 

 (LiNNÉ), and afterwards also by Dr. Tesch in his paper on the 

 Decapods collected by the ,,Wodan". The catch, last year, of 

 some specimens of the true Leander Squilla (Lixné) in the Ooster- 

 schelde (Eastern Sheldt) near lerseke first called my attention to 

 this question and so became the origin of this paper. 



