116 



Carcinologist and Ichthyologist, in bis paper entitled „Crustacea 

 Neerlandica", in this Journal, New Series, Vol. I, p. 100. 



I furthermore considered that our knowledgo of these two 

 species and of sorae other ones is still rather incomplete and 

 that there is still some confusion as regards their synonymy. So, 

 e. g., L. adspevsus (Rathke), L. Fahricii (Rathke), L. rectirostris 

 (Zaddach) and L. Leachi'i (Bell) have been united, in 1890, by 

 Dr. Ortmann (Decapoden des Strassburger Museums) to one spe- 

 cies, L. adspersHS (Rathke), but in the Reverend Stebbing's 

 valuable work „A History of Crustacea" and in the interesting 

 paper of the danish Naturalist Th. Mortensen on the develop- 

 ment of L. Fabrkii^ published respectively in the years 1893 

 and 1897, the name of L. Fahricii bas been maintainod and not 

 that of L. adspersus. 



I therefore took the resolution to submit all these questions to 

 a new examination. ïhanks to the courteous assistance of several 

 Naturalists, I succeeded in collecting numerous specimens of some 

 species of this genus froni the Black Sea, the Adriatic, the 

 Mediterranean and from some localities on the West Coast of 

 Europe. Nearly all these specimens were in my j)Ossession at the 

 end of July 1914 and I received still a few shrimps in August, 

 l)ut the terrible war bas caused tliat no specimens could be 

 obtained from the coast of Britanny (Concarneau), from that of 

 Dorsetshirc (Poole Harbour) and from the Irisli Sea (Liverpool), 

 to which localities I also had written. 



My thanks therefore are due to Dr. E. J. Allen Esq. (Plymouth), 

 Cand. Mag. H. Blegvad (Copenhagon), Dr. A. Brinkmann (Ber- 

 gen, Norway), Dr. R. Gast (Naples), Rrof. G. Gilson (Brussels), 

 Vyoï. P. Hallez (Lille), Dr. Tn. Krumbach (Rovigno), Dr. O. 

 NoRDGAARD (Trondlijcm), Dr. H. V. Redeke (Helder), harbour- 

 master N. A. Sizoo (Numansdorp, Holland), Dr. K. Stephensen 

 (Copenhagen), Mr. A. O. Walker (lUcombe, Kent) and Mr. S. 

 A. Zernóv (Sebastopol). 



1 liave, tinally, to thank Prof. M. Braun (Königsberg) and 

 Prof. O. BCtschli (Ileidell)erg), wlio liave cnablcd me to study 



