294 
ZOOLOGY OF THE FAR EAST. 
border is situated above the middle of the terminal segment of the antennular 
peduncle. In the smaller example, which is 85 mm. in length, the rostrum agrees 
precisely with de Man's fig. 33a. 
The large specimen was taken from fishermen' s nets opposite Singgora in the outer 
lake of the Tale Sap ; the smaller individual is from Patani Bay, at the mouth of the 
Patani river in the Siamese Malay States. 
Penaeus carinatus, Dana. 
1906. Peneus semisulcatus, Alcock (uot of de Haan), Cat. Indian Decap. Crust., Ill, i, p. 10, 
pi. i, fig. 2. 
igii. Penaeus carinatus, de Man, Decap. ' Siboga' Exped., Penaeidae, p. lor. 
1915. Penaeus carinatus, Kemp, Mem. Ind. Mus., V, p. 317. 
Two males and one female, varying in length from 176 to 186 mm., are in Dr. An- 
nandale's collection. They were obtained from nets and stakes set by fishermen oppo- 
site Singgora in the outer part of the Tale Sap in lyower Siam. 
Genus Penaeopsis, Bate. 
Penaeopsis monoceros (Fabricius). 
1906. Metapenens monoceros, Alcock, Cat. Indian Decap. Crust., Ill, i, p. 18, pi. iii, figs. 7, 
ya-c. 
1911. Penaeopsis monoceros, de Man, Decap. 'Siboga' Exped., Penaeidae, p. 55 and (1913), 
pi. vi, figs, i^a-c. 
Numerous examples of both sexes, the largest 107 mm. in length, were found 
by Dr. Annandale in the Tale Sap, along with the preceding species. The petasma 
does not appear to be fully developed in any of the specimens. 
Penaeopsis af finis (Milne-Edwards). 
1906. Metapeneus affinis, Alcock, Cat. Indian Decap. Crust., Ill, i, p. 20, pi. iii, figs. 8, Sa-d. 
1911. Penaeopsis affinis, de Man, Decap. ' Siboga ' Exped., Penaeidae, p. 57 and (1913), pi. vi, 
figs. 15 a, h. 
Nine males were found in company with P. monoceros. All are young, the largest 
being only 78 mm. in length. The fifth legs are not appreciably longer than in 
P. monoceros of similar size, and in no case reach beyond the end of the second seg- 
ment of the antennular peduncle. The petasma precisely resembles that figured by 
de Man and differs conspicuously from that of the larger specimens recorded from 
the Chilka Lake ' and from Alcock' s figure. The differences, as de Man has noted, 
are probably due to age. 
Penaeopsis brevicornis (Milne- Edwards). 
1906. Metapeneus brevicornis, Alcock, Cat. Indian Decap. Crust., Ill, i, p. 22. pi. iv, figs. 10, 
10 a, b. 
The collection contains two large females from the Tale Sap, found with P. mono- 
ceros, and one male and four females from Patani Bay, at the mouth of the Patani 
1 Kemp, Mem. Ind. Mus., V, p. 321 (1915). 
