1922] 



S. Kemp : Notes on Crustacea Decapoda. 



133 



The last three peraeopods are rather stout. The propodites 

 (text-fig. 11b) are unarmed except for a spinule at the distal end 

 of the posterior margin ; they are from 45 to 5 times the length 

 of the dactyli. The dactylus is broad at the base, simple, strongly 

 curved and is partially concealed by long setae springing from the 

 end of the propodus. 



The appendix masculina on the endopod of the second pair 

 of pleopods is fully formed ; the specimen thus appears to be an 

 adult male. The sixth abdominal somite is less than 1*5 times 

 the length of the fifth. The telson has the usual three pairs of 

 apical spines, but is unarmed on the dorsal surface except for a 

 single spine on the right hand side placed quite close to the apex 

 (text-fig. lie). 



Text-fig. 11. — Palaemonella orientalis Dana. 

 <>. Second peraeopod. c. Tip of telson. 



b. Last two segments of third peraeopod. 



The single specimen is about 9 mm. in total length. In life it 

 was completely transparent. 



The specimen agrees almost exactly with Dana's description 

 and differs but slightly from his figures. The principal discrepan- 

 cies are that in the Indian specimen the mandibular palp is one- 

 segmented, that the exopod of the third maxilliped does not reach 

 so far beyond the end of the antepenultimate segment and that 

 the second peraeopods are rather longer and a little more slender. 



The specimens recorded by de Man differ more considerably. 

 According to his description the first legs are much longer, with 

 the carpus longer in relation to the chela. The second peraeopods 

 are also much longer and the fingers bear teeth and are only half 

 the length of the palm. The dactyli of the last three peraeopods 

 are one-third the length of the propodus. 



