Fish of the Tale vSap. 
495 
Oxyurichthys sp. {prox. microlepis Klkr.). 
Dr. Annandale obtained three young specimens of the genus Oxyurichthys in the 
channel between Koh Yaw and the mainland which I am not able to identify speci- 
fically. Working out these examples with Giinther's catalogue, they appear to re- 
present Bleeker's Oxyurichthys microlepis,^ which is found in the seas of Pinang, Java 
and Madura and in the Chinese Sea. 
Micrapocryptes sp. 
I refer two specimens i8 and 16*5 mm. in length respectively to the genus 
Micrapocryptes ; they were collected by Dr. Annandale in the channel between 
B. Pak Raw and B. Pak Cha. I have compared these examples with theispecimens 
of the Indian species recently described by me ^ from the Chilka I^ake and the Gan- 
getic delta and find that they do not agree with them in several important points. 
In the Siamese examples the body is more slender, the caudal peduncle is longer and 
narrower, the eyes are smaller and the mouth opening is somewhat larger. 
Text-fig. 7. — I^ateral view of Micrapocrvptes sp. 
In the Indian species the dorsal and the anal fins are somewhat higher and con- 
tain fewer raN^s. The only other species of the genus known to me is M . hrachypterus ' 
(Bleeker) found in Grati Lake in Java. Of this species I have neither specimens for 
comparison nor a detailed up-to-date description with figures. The Siamese exam- 
ples seem, on the whole, to be nearer to M. hrachypteviis than to M . fra<];ilis from 
India. 
Both the specimens collected by Dr. Annandale are either young or females, 
because in both the teeth are very minute and are closely set together. 
Family PERIOPHTHALMIDAE. 
Periophthalmus koelrcuteri (Pall.). 
i87(). Periophihalmus koelreuteri. Day, Fish. India I, p. 303, ])1. Ixiv., fig. 8. 
This species is represented by two specimens in the collection, one fairly grown 
up was obtained at Kaw Deng and the other a very young form was collected in the 
channel between B. Pak Raw and B. Pak Cha. 
1 Giinther, Cat. Brit. Mus. Fish. Ill, p. 49 (1861). 
i Hora, Mera. Ind. Mus. V, p. 732, figs. 31-33 (1923). 
i Giinther, Cat. Brit. Mus. Fish. Ill, p. 84 (1861). 
