Crustacea Decapoda and Stomatopoda. 265 



The eggs are very large, about i"5 mm. in length and i'i5 mm. in breadth. One 

 specimen is parasitised by a Bopyrid. 



It appears to me probable that the six larger specimens recorded by Manchester 

 from the Tale Sap under the name Palaemon nipponensis ' are in reality examfjles 

 of this species. De Man has noted the great resemblance that exists between the 

 two forms and judging from Dr. Annandale's collection P. nipponensis does not occur 

 in I^ower Siam. The rostrum in Ivanchester's larger specimens bears 10 or 11 

 teeth above and 4, 5 or 6 below, agreeing with the individuals described above. 

 I^anchester's smaller examples with 6, 7 or 8 teeth on the upper border of the rostrum 

 and 3, 4 or 5 below, probably belong to some other species ; in young P. elegans that 

 I have examined the rostral formula is the same as in adults. 



Dr. Annandale's specimens of P. elegans were obtained at Lampam in Patalung 

 in fresh water. They were found in the Patahtng river and in ponds and ditches in 

 the vicinity. In the Tale Sap itself the species was not found. P. elegans is recorded 

 by de Man from Buitenzorg and Sinagar in Java. 



Palaemon neglectus, de Man. 



1888. Palaemon acutirostris, de Man {nee Dana), Journ. Linn. Soc, XXTI, p. 280, pi. xviii, 



fig- 7- 



1891. Palaemon acutirostris (de Man nee Dana), Ortmann, Zool. Jarhb., Syst., V, p. 707. 



1892. Palaemon (Eiipalaemon) equidens, de Man {nee Dana), in Weber's Zool. Ergebn. Reise 



Niederlând. Osi-Ind., II, p. 453, pi. xxvi, fig. 37 {not the synonymy). 

 1906. Palaemon {Eupalaemon) neglectus, de Man, Notas Leyden Mus., XXVI p. 201, pi. xv, 

 fig. 6. 



To this species belong a number of specimens obtained by Dr. Annandale in the 

 Botanical Gardens at Penang. 



The rostrum is a little shorter than the antennal scales ; its upper margin is 

 straight or a little convex near the base and is a trifle upturned at the tip. On the 

 dorsal edge there are from 11 to 13 teeth (usually 12),'^ of which the three hindmost 

 are placed on the carapace, the fourth being immediately above the posterior limit 

 of the orbit. On the lower edge there are 4 or 5 teeth (nearly always 4).-^ 



The largest male, a specimen 88 mm. in total length, bears a great number of 

 very small spinules on the carapace ; but these are absent in all the other examples. 

 Six specimens yield the measurements shown on the next page. 



The proportions of the segments of the second peraeopods are rather variable. In 

 males the carpus is usually shorter than the merus or equal in length with it, whereas 

 in females it is a little longer than the merus. In the larger claw of the largest male 

 the fingers are a little longer than the carpus ; in all other cases they are decidedly 

 shorter. In males the chelipedes are always stout ; in the larger limb of the male 88 

 mm. in total length the merus is 47 mm. thick at its distal end and the carpus 5-0 mm.; 

 the palm is very slightly flattened, being 5 '4 mm. in breadth and 4-9 mm. in thickness. 



' Lanchester , Proc. Zool. Soc. London, 1901, p. 566. 



' Of fifteen specimens three have 11 dorsal teeth, nine have 12, two have 13 and one abnormal individual has 9. 



i Of fifteen specimens fourteen have 4 ventral teeth and one has 5 . 



