MACRURA. 75 



into a long pointed tooth anteriorly like the thelycum in the female. As in the 

 female, there is a pair of spines present at the base of each of the first two pairs of 

 walking legs. The 3rd maxillipeds are similar in both sexes, and are more massive 

 than the thoracic walking legs and extend slightly further forward than the tip of 

 the antennaJ scale. Thev are richly setose and have the joints somewhat flattened. 

 The first three pairs of walking legs are chelate and the carpopodite is only slightly 

 longer than the propodite. The fingers are slightly longer than the palm. 

 General distribution : New Guinea, Japan, Indian Ocean. 



Sicyonia cristata (de Haan) (?). 



Hippolyte cristatus, de Haan, 'Fauna Japonica,' pi. xlv., 1849. 

 Sicyonia cristata, de Haax, 'Fauna Japonica,' p. 194, 1849. 



Localities : West of Periya Paar (Station LXL), 1 c?, 25 millims. ; off Dutch 

 Modragam (Station LVIL), 1 3, 25 millims.; Coral reef, Gulf of Manaar (Station 

 LIV.), 1 $, 35 millims. 



I refer these specimens to the above species, although a little doubtful as to their 

 identity. I have not been able to see figures of de Ha ax's species, but these 

 specimens agree closely with the description. Sp. Bate evidently considered this 

 species to be identical with Sicyonia lancifer. The Ceylon specimens resemble the 

 latter species closely, but they possess characters differing from S. lancifer. The 

 carapace is more arched than in S. lancifer. The rostrum does not turn up at 

 the end and only reaches to the end of the eyes. The abdomen differs only from that 

 of S. lancifer in not having pleural spines on each segment. The three distal joints 

 of the 3rd maxillipeds appear to be more flattened than in S. lancifer, and the 

 hepatic spine on the carapace is not so well developed as in that species. 



General distribution : Japan, Ceylon. 



Sicyonia sculpta, Milxe-Edw. 



Sicyonia sculpta, Milxe-Edw., ' Ann. des Sci. Nat.,' ser. 1, t. 19, p. 339, 1830. 



Locality : Trincomalee (Station XX.), 1 ? , 17 millims. 

 General distribution : Atlantic, Mediterranean, Ceylon. 



Family: SERGESTID^E. 



Acetes, Milxe-Edw., 1830. 



Acetes indicus, Milxe-Edw. 



Acetes indicus, Milxe-Edw., 'Ann. des Sci. Nat.,' t. 19, p. 350, 1830. 

 Locality : Galle Harbour (Station XXXVI.), 1 specimen, 14 millims. long, in a 

 damaged condition, but evidently belonging to this species. 



This species is generally found either in fresh water or in the brackish water of 

 estuaries. 



Distribution : Mouth of River Ganges, Ceylon. 



L 2 



