igio.] N. Annandale and J. T. Jenkins : Plectognathi and Pediculati. 15 



TctrodoH viridipimctatus , Day. 



This appears to be a species of doubtful validity, as Day's descriptions and 

 figures differ from those of T . patoca mainly as regards markings. The type is a 

 painted skin, and no other example is known; moreover, the artificial markings on the 

 type do not at all agree with Day's figure. The specimen, therefore, is hardly even 

 of historical value. 



Tetrodon immactdatus , Bloch and ,'>chneid. 



Several specimens have been recorded from both sides of the Bay. The largest 

 specimen in the collection is 21 '5 cm. long. The .spines in this species are covered 

 with a thick cuticular investment None of the specimens in the collection have 

 barred sides. 



Telrodon nigropitiictatits, Bloch and Schneid 



This species was not recorded on the "Golden Crown." 



There are two specimens in the collection. One is covered with fairly long .spines, 

 the other almost naked. In the latter the skin is covered with small, closely set, soft 

 tubercles. 



The spiny specimen has no history : the other is from Port Blair in the Andamans. 



Tetrodon stellatus, Bloch and Schneid. 



Recorded from the ' ' Golden Crown ' ' on .several occasions. 



In a series of specimens it does not seem possible to draw any real distinction 

 between Giinther's varieties " and /3, except that variety « probably consists of old and 

 variety /3 of young individuals. 



Of Giinther's var. y (the Crayracion astrotaenia of Bleeker), we have examined 

 two small specimens; but we do not feel justified in expressing an opinion, in the 

 absence of intermediate forms, as to its distinctness. 



Tetrodon fluviatilis, Ham. Buch. 



This species, which appears to be entirely littoral, estuarine and fluviatile, was 

 not obtained by the "Golden Crown," but a large series of specimens has been 

 examined. 



There are two well-marked varieties in the river Ganges and on the Indian coasts. 



In var. A (figured by Hamilton in his Fishes of the Ganges) there are well- 

 defined pale bars across the back, and the caudal fin is more or less definitely spotted 

 or barred. The ventral surface is usually unpigmented. 



In var. B (figured by Day in his Fishes of Lndia) the markings are much less 

 distinct, the dorsal surface being marbled rather than barred. The ventral surface is 

 usually pigmented. 



Var. B has not yet been examined by us from fresh water, but var. A occurs 

 on the Orissa coast as well as far up the Ganges (Sara Ghat). 



