4 DE. J. G. DE MAN ON THE PODOPHTHALMOUS 



represented in tlie collection, e. g., Matuta, Palinurus, and the 

 Hippidcs. 



Most species are represented by a small number of specimens. 

 A few, however, are an exception and appear to haye been very 

 common at the Mergui Islands at the time the collection was 

 made, as indicated in the following table : — 



Specimens. Specimens. 



Leptodius exaratus, M.-Edw.... 25 Gelasimus triangularis, A.M.-'Ei. 33 



Goniosoma merffiiiense, n. ST^.... 20 Botilla intermedia, n. ap 32 



GelasimusI)ussicmieri,'M..-^dw. 67 Metaplax eleffans, n. s^p 29 



acutus, Siim-ps 67 Sesarma Edwardsi, n. sTp 66 



annulipes, Latr 33 Porcellana picta, Stimps 25 



The genus Porcellana is represented in the Bay of Bengal by 

 no fewer than 15 species, 8 of which are in the collection. 



Finally, I desire to take this opportunity of expressing my 

 obligation to the following gentlemen, from whom I have received 

 valuable assistance. I am especially indebted to Dr. F. A. 

 Jentink, Director, and to Dr. E.. Horst, Conservator, of the 

 Zoological Museum of Leyden, for having permitted me to study 

 a large series of interesting typical specimens preserved in that 

 great Institution. My thanks are due to Mr. C. Eitzema, 

 Conservator of the same Museum, for having kindly granted me 

 the loan of many valuable carcinological works during the time 

 I was working at this Collection ; and also to Prof. Alph. 

 Milne-Edwards, of Paris, to Prof. Mobius, of Kiel, and to Mr. C. 

 Koelbel, of Vienna, for having permitted me to study a large 

 number of typical specimens, described respectively by the late 

 H. Milne-Edwards, by Eabricius, and in the 'Novara' Expedition. 

 I have to express my thanks also to Dr. E. Meinert, of Copen- 

 hagen, for having graciously presented to me excellent life-size 

 photographs of three species of Eabricius, the types of which 

 are preserved in the Museum of Copenhagen ; and to Dr. Hil- 

 gendorf, of Berlin, and to Dr. E. Eichters, of Erankfort-on-the- 

 Main, for having kindly compared for me specimens from Mergui 

 with typical specimens of Herbst and Eiippell. 



