FRESH- WATER FISHES OF SIAM, OR THAILAND 531 



Gulf of Siam at Sriracha, Southeastern Thailand, June 14, 1927 ; and 

 one, 9.6 cm. long, from the inner lake of the Tale Sap, Peninsular 

 Thailand, July 4, 1924. These specimens were examined by Dr. Fred- 

 erick P. Koumans in connection with his study of Bleekerian goby 

 material in the Royal Natural History Museum in Leiden, Holland, 

 and found to agree with the types. 



ACENTROGOBIUS REICHEI (Bleeker) 



Gobius reicJiei BiLKEKER, 1853 (86), p. 509 (Padang, Sumatra). 



Described by Bleeker in 1853 from a single specimen, 5.5 cm. long, 

 from a river in Padang, Sumatra, this species has rarely been noted 

 in literature since Bleeker's time. Among a collection of goboid fishes 

 from the Andaman Islands Koumans (1940, p. 15) found 22 specimens 

 of this species, recorded without comment or description. Two speci- 

 mens from Thailand waters in the U. S. National Museum are referred 

 to this species, after having been carefully compared with the orig- 

 inal description. One, 4.5 cm. long, was taken on Koh Chang, Gulf 

 of Siam, June 26, 1929. The latter specimen was identified as A. 

 reichei by Dr. Koumans after comparison with Bleeker's type. 



The side of this fish is marked by a conspicuous longitudinal row of 

 dark spots, about 5 in number, which are double or triple, as pointed 

 out by Bleeker. The specimens in hand have on the cheek a patch of 

 papillae, which is more prominent than in any other local species, but 

 is not referred to in any published description. The patch is oblong, 

 extends from the upper lip to the sulcus between the opercle and pre- 

 opercle, and consists of 7 or 8 horizontal rows of small papillae. 

 Other conspicuous lines of papillae extend under the eye and along 

 the ramus of the lower jaw and thence backward along the lower edge 

 of the cheek to the operculo-preopercular groove, in which is a promi- 

 nent vertical row of papillae. 



ACENTROGOBIUS ATRIPINNATUS (H. M. Smith) 



RhinogoUus atripinnatus Smith, 1931a, p. 45 (Gulf or Siam off Tachin River). 

 This goby is known from a few specimens, 6 to 8.5 cm. long, from 

 the Menam Chao Phya at Paknam, the Gulf of Siam off the mouth of 

 the Tachin River, the estuary of the Chantabun River, and the outlet 

 of the Tale Sap at Singora. The uniform light brown color of the 

 body and head is in contrast with black dorsal, caudal, anal, and ventral 

 fins, the pectorals being dusky. The head is crossed by lines of papillae 

 most conspicuous across the cheeks. In a specimen, 6.8 cm. long, from 

 Singora each scale of 3 ventral rows has a round, rich brown basal spot, 

 these spots being only very faintly discernible in the type. 



