OCYPODE CERATOPHTHALMA. 



NOTE XXXVIII. 



CARCINOLOGICAL STUDIES IN THE 

 LEYDEN MUSEUM. 



BY 



Dr. J. G. DE MAN. 



245 



Ocypode ceratophthalma , Pallas. 



Ocypode ceratophthalma, Milne Edwards, Annal. Scieac. 

 Nat. 1852, p. 141. Hilgendorf, in: Baron von der Dec- 

 ken's Reisen in Ost-Afrika , p. 82. 



The Leyden collection contains: P. eleven specimens, 

 collected on the shores of Nossy-Faly near Madagascar, 

 2'. three from the island of Xulla-Bessy (Moluccas) , 3**. 

 one from Amboina, 4". eight (5 cf, 3 9) froi^ Amoy (China), 

 presented by Mr. G. Schlegel, 5°. one from the Philippi- 

 nes, collected by Semper and presented by the Göttingen 

 Museum under the name of Ocyp. longecornuta Dana. — All 

 these specimens, though positively belonging to the same 

 species , present however some remarkable varieties. 



The terminal spines of the eyes are very long and strong 

 in the adult males , becoming gradually smaller in younger 

 specimens (Ocyp. urvillei Guérin) and being only tubercu- 

 liform even in the adult females ; their relative thickness 

 however presents individ ual varieties , these spines being 

 slender and tapering in the Nossy-Paly and Amboina spe- 

 cimens , but thicker in the Amoy individuals , and in the 

 large adult male specimen of the Philippines they are a 

 little shorter but rather thicker than in the Amoy forms , 



Notes from tlie Ijeyden üMuseum, "Vol. III. 



