264 



ZOOI.OGY OF THE FAR EAST. 



1892. 



1903. 



Palaemon elegans, de Man. 



Palaemon (Eupalaemon) elegans, de Man, in Weber's Zoo!. Ergebn. Reise Nieierlând 



Ost.-Tnd., II, p. 440, pi. xxvi, fig. 36. 

 Palaemon (Eupalaemon) elegans, de Man, Abhandl. Senck. naturf. Ges., Frankfurt, XXV, 



p. 764. 



The specimens in the collection are from Patalung in Lower Siam. They 

 agiee closelj^ with the original description and also with an adult male from 

 Buitenzorg determined by de Man and preserved in the Indian Museum : there are, 

 however, slight differences in the form of the rostrum. 



In Javanese .specimens the upper edge of the rostrum is usually convex and 

 at the apex is straight or directed a little downwards. In those from Patalung 

 the upper edge is usually a trifle sinuous and the apex is straight, or (more 

 particularly in young males and females) directed a little upwards. The teeth on the 

 upper edge vary in number from g to 13,' with 2 or 3 situated on the carapace, thus 

 agreeing exactly with de Man's account. On the lower edge, however, there are from 

 4 to 6 teeth (usually 4 or 5),' whereas in Javanese specimens there are only 2 or 3 and 

 rarely 4. 



The spinules on the carapace of the male, except in the case of the largest speci- 

 men, are restricted to the lateral walls and to the region in the vicinity of the 

 hepatic .spine. 



The identity of the Patalung specimens with P. elegans is proved beyond doubt 

 by the form of the chelae of the adult male which agree in every particular with 

 those of the specimen from Buitenzorg referred to above. The fingers are clothed 

 with hair in their basal two- thirds, with teeth at their proximal end exactly as des- 

 cribed by de Man, while the movable finger bears distally the characteristic double 

 row of tubercles. Seven specimens yield the following measurements : — 





X) 



(ii 



•à 

 



13 



Second peraeopod 



: LENGTH OF j 











a 











ai 





dJ 



.fl 



^ Q.» 



S 





tfi 





3 ! 







+-> 0) 



•^ CO 



d 





Xi 





">> 1 





aj 



M O 



bc S 



'S ! ^ 



p, 



g 



+j 



X 





n cs 



C OJ 



•9, '-' 











<u 



C 



<u Oi 



m O* 







^ 



cS 



"cS 



rt 



tn 



^ 



a 



^ 



<^ 



g 







Oa 



Q 



S 



61 



16-5 



8 



9'9 



16-7 



23"5 



t8-5 



15-6 







( 



7f.5 



io'4 



14-0 



197 



i3'4 



i4'o i 



(? 



57 



■"1 



54 



8-0 



II-4 



137 



[0-8 



9'4 



cT 



58 



14-3 



65 



9-4 



13-0 



19- 1 



13-5 



Tr-6 j 



^ 



60 



14-2 



43 



7-1 



8-5 



117 



7-9 



77 1 



cf 



49 



12-2 



377 



6-5 



77 



97 



7-3 



6-5 



9 ovig 



47 



ir3 



31-5 



5-4 



57 



8-8 



51 



4-3 



9 ovig. 



40 



97 



24-5 



47 



^' 4"9 



6-6 



3-9 



3-5 



1 Of twenty-three specimens two have 9 dorsal teeth, seven have 10, nine have 11, four have 12 and one has 13. 



2 Of twenty-three specimens twelve have 4 ventral teeth, ten have 5 and one has 6, 



