MACRURA. 89 



Family : CRANGONIDiE. 



iEgeon, Guerin-Meneville, 1835 

 (= Egeon, Risso, L816). 



JEgeon cataphractus (Olivier). 



Cancer cataphractus, Olivier, 'Zool. Adriatica,' p. 30, 1792. 



Egeon loricatus, Risso, 'Crust, de Nice,' p. 100, 1816. 



Crangon cataphractus, Milne-Edw., 'Hist. Nat. Crust.,' vol. 2, p. 343, 1837. 



JEgeon cataphractus, Ortmann, 'Zool. Jahrb.,' vol. 5, p. 535, 1890. 



Locality : Galle (Station XXXV.), 1 specimen. 



This single specimen agrees closely with the type species, and also with Henderson's 

 species, /Egeon orientalis,* in most respects. The latter species differs from the ahove 

 species only slightly with regard to the teeth present on the carapace, and in the 

 absence of the small hepatic groove on the sides of the carapace. Since the Indian 

 species was formed from the characters of a single specimen, it is by no means 

 improbable that this specimen merely represents an extreme variation of the parent 

 species. In all other characters, excepting the two above mentioned, /Egeon orientalis 

 agrees with /Egeon cataphractus. 



General distribution : Mediterranean, Senegambia, South Africa, Ceylon. 



Family: PROCESSID^E. 



Processa, Leach, 1815 

 (=Nika, Risso, 1816). 



Processa canaliculata, Leach. 



Processa canaliculata, Leach, ' Malac. Podoph. Brit.,' p. 641, 1815. 

 Nika edulis, Risso, 'Crustaces de Nice,' p. 85, 1816. 

 Nika canaliculata, Desmaret, 'Consid. gen. Crust.,' p. 231, 1825. 

 Nika hermudensis, Rankin, 'Ann. N.Y. Acad. Sci.,' XII., p. 536, 1900. 



Localities: Pearl banks, Gulf of Manaar (Station III.), 6 specimens; Muttuvaratu 

 Paar (Station VI.), 1 specimen; 10 miles west of Cheval (Station XLVIL), 2 speci- 

 mens; Cheval Paar (Station XLVIIL), 4 specimens; south-east of Modragam 

 (Station LXLV), 2 specimens. 



None of these specimens appear to differ in any marked degree from the ordinary 

 characters of the species. 



General distribution : Madeira, Japan, West Indies, Gulf of Mexico, South Africa, 

 North-west Europe, Ceylon. 



* J. R. Henderson, ' Trans. Linn, Soc.,' 2nd series (Zoology), vol. v., part 10, p. 446, and plate 40, 

 figs. 16 and 17, 1893. 



N 



