ABT. 7 NEW SIAMESE FISHES SMITH 35 



fish is abundant, but owing to its small size and translucency is 

 easily overlooked. 



Collections made from January to May contain egg-bearing fe- 

 males, and it appears that the egg-laying period is protracted and 

 may extend over most of the 3^ear. An ovigerous female 2.1 cm. 

 long taken February 10, 1928, contained 238 eggs with an average 

 diameter of .64 mm. 



The sexes may be readily distinguished by the shape of the genital 

 papilla : short, broad, and truncate in the female, long, slender, and 

 pointed in the male, as in Mistichthys and various other gobies. 

 The eggs are clearly visible through the transparent abdominal walls. 

 If there is a difference in the average size of the male and female 

 fish it is not marked. Thus, of 16 specimens collected January 19, 

 1929, 13 were females ranging from 18 to 21 mm. in total length, 

 with an average of 19.8 mm., and 3 were males ranging from 18 to 

 21 mm., with an average of 20 mm. The numerical disproportion 

 of the sexes is shown from other collections, as, for example, on 

 May 9, 1929, when, of 40 examples taken at random in a fine-mesh 

 basket, 30 were females. 



THAIGOBIELLA, new genus 



Size minute; body moderately elongate; mouth large, lips thin, 

 tongue emarginate; teeth pluriserial; eye large and placed high on 

 head; two dorsal fins well separated, the first with 5 spines, the sec- 

 ond with 8 branched rays; anal similar to second dorsal; ventrals 

 not adnate to abdomen, and united for their entire length, forming 

 a deep cup; pectorals without silky, free upper rays; body com- 

 pletely covered with large scales, opercles scaled, cheeks and other 

 parts of head naked. 



This genus most closely resembles Vaimosa Jordan and Seale the 

 members of which inhabit brooks in the South Sea islands and Philip- 

 pines, It differs therefrom in the reduced number of dorsal and 

 anal rays, in the character of teeth and scales, in the size of head, etc. 



{Thaigohiella^ from Thai, the ancient name of the Siamese race, 

 and gohiella^ little goby). 



THAIGOBIELLA SUA. new species 



Desoription. — Form oblong, moderately compressed; dorsal and 

 ventral profiles nearly horizontal, the profile of snout steep; depth 

 4.4 in length ; caudal peduncle very broad, two-thirds depth of body 

 and 2.25 times in head; head long, 3 in length; mouth large, very 

 oblique, extending to a point under anterior margin of pupil, lips 

 thin; teeth long, slender, prominent, in a band in each jaw with a 

 few enlarged teeth interspersed; eye placed high, 3 in postorbital 

 part of head, about equal to snout and to interorbital space; scales, 



