296 ZOOI.OGY OF THE FAR EAST. 



In the paper cited above I have drawn particular attention to the four individuals 

 from the Prai river, for it is on their characters that I have based my statement that 

 the male in this species is dimorphic. In all the four specimens (precisely as in males of 

 A . indiens and A . erythraeus) the ultimate segment of the antennular peduncle is slender 

 and longer than the basal segment. In examples of the same sex from the Patan 

 river, as well as in numerous males from three separate localities on the west coast of 

 the Bay of Bengal, the ultimate peduncular segment is invariably short, closely 

 resembling that of the female ' : the specific identity of the Prai river specimens 

 is proved beyond doubt by the distinctive form of the petasma. 



Acetes japonicus, Kishinouye. 



1917. Acetes japonicus, Kemp. Rec. Ind. Mus., XIII, p. 56, text-figs. 



The collection contains numerous specimens obtained in the market at Osaka in 

 Japan, a considerable number from the Tale Sap and a few from the Patani river in 

 the Siamese Malay States. The examples from the Tale Sap were found along with a 

 few A . indicus at the mouth of the outer lake near Singgora in water of specific 

 gravity varying from 1-004 ^o i"Oo85 (corrected). Those from the Patani river were 

 taken in company with A . erythraeus in water that was fresh at the time of their 

 capture but subject to tidal influence. 



Genus Lucifer, Thompson. 

 Lucifer hanseni, Nobili. 



1906. Lucifer hanseni, Nobili, Ann. Sci. nat., Zool. (9), IV, p. 25, pi. ii, fig. i and text-fig. 3e, 

 p. 27. 



1915. Lucifer hanseni, Kemp, Mem. Ind. Mus., V, p. 324, text-figs. -^ja-d. 



1916. Leiwifer hanseni, Borradaile, Brit. Antarct. Exped., ' Terra Nova,' Zool., Ill, p. 83. 



A number of specimens were obtained in the outer lake of the Tale Sap, between 

 Koh Yaw and the mainland and at the mouth of the lake near Singgora. The speci- 

 fic gravity of the water in which they were found varied from 1-00625 to 1*0085 

 (corrected) . 



Lucifer hanseni was described by Nobili from the Red Sea and has recently been 

 recorded by Borradaile from Melbourne. 



STOMATOPODA. 



Family SQUIIvIvIDAE. 



Genus Squilla, Fabricius. 



Four species and one variety of Stomatopoda, all belonging to the genus Squilla, 



were found by Dr. Annandale at the mouth of the Tale Sap in Peninsular Siam. 



They were obtained in fishermen's nets and all were caught in water of specific gravity 



1-0085 (corrected). 



1 I have recently examined a large male of A. erythraeus from Silavathurai Lagoon, near Tuticorin, S. India, which 

 agrees exactly with the specimens from the Prai River. This is the first record of the " high " dimorphic male from the 

 coasts of British India. We are indebted to Mr. J. Hornell for the specimen. 



