Crustacea Decapoda and Stomatopoda. 265 
The eggs are very large, about 15 mm. in length and i- 15 mm. in breadth. One 
specimen is parasitised by a Bopyrid. 
It appears to me probable that the six larger specimens recorded by Lanchester 
from the Tale Sap under the name Palaemon nipponensis ' are in reality examples 
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 Lower Siam. The rostrum in Lanchester' s larger specimens bears 10 or 11 
teeth above and 4, 5 or 6 below, agreeing with the individuals described above. 
Lanchester' 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 Patalung 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 {nec Dana), Journ. Linn. Soc, XXII, p. 280, pi. xviii, 
%• 7- 
1891. Palaemon acutirostris (de Man nec Dana), Ortmann, Zool. Jarhb., Syst., V, p. 707. 
1892. Palaemon (Eupalaemon) equidens, de Man {nec Dana), in Weber's Zool. Ergebn. Reise 
Niederldnd. Ost-Ind., II. p. 453, pi. xxvi, fig. 37 {not the synonymy). 
1906. Palaemon {Eupalaemon) neglectus, de Man, Notes 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 T2),'^ 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. 
3 Of fifteen specimens fourteen have 4 ventral teeth and one has 5. 
