18 SQtTAMIPnmES. 



eye ; pweoperculuni entire ; the dorsal and anal fins rounded poste- 

 riorly. Head, body, and fins with, three pairs of brown nross-streaks ; 

 a single brown streak from the symphysis of the upper jaw to the 

 nape of the neck ; another vertical streak over the tail (where it is 

 broadest), and over the soft portions of the dorsal and anal fins: 

 the anterior streak of the first pair is thB ocular band, which, half 

 as wide as the orbit, extends over the chest. Ventl^ls white ; caudal 

 with a blackish cross-band near the base. 

 East Indian Seas. 



a, b. Fine specimens. Singapore. 



c. Adult : skin. From Gronov's Collection. 



28. disBtodon xUietensis. 



Cuv. 4' ^c^^- vii. p. 39 ; Bleek. Act. Soc. Nedcrl. i. Amboina, p. 38. 

 D.g A.1 L.lat.30. 



The snout is pointed ; praDopeiculum crenulated at *the lower 

 margin ; dorsal and anal fins roimded posteriorly. The ocular band 

 is nearly as broad as the orbit, and extends over the interoperculum 

 from the middle of the neck ; snout brownish- violet ; forehead with 

 small white cross-streaks. Body with two very bruad violet cross- 

 bands, the anterior from between the fourth and eighth dorsal spines 

 to behind the root of the pectoral, the posterior from the origin of 

 the soft dorsal to the anterior half of the anal ; there are, moreover, 

 about seven blackish streaks crossing the body, on, and between, the 

 bands described ; tail with a black cross-band. The soft doraal 

 with a light brownish band and a brown edge ; the soft anal with 

 two light-brown bands and with a blu6 and blackish edge ; caudal 

 with a black cross-band near the margin, which is transparent; 

 ventrals yellow. (Bl.) 



Seas of Amboyna, Ternate, and Ulietea. 



29. Chaetodon robustus. 



D.IH. A.^. L. lat. 35. L. transv. 6/15. 



The snout is moderately produced and somewhat conical ; the 

 lower praeopercular margin slightly denticulated ; the dorsal and 

 anal fins rounded posteriorly. The ocular band is much narrower 

 than the eye, and reaches over the interoperculum. A brown ver- 

 tical band from the third and fourth dorsal spines to behind the base 

 of the pectoral ; another much broader one is white-edged, and 

 extends from the tips of the last five dorsal spines over all the soft 

 dorsal downwrds to the posterior third of the base of the anal; a 

 narrow brown band round the free portion of the tail ; a single bro^vn 

 streak along the middle of the upper surface of the head. Caudal, 

 anal, and ventral fins white (in spirits). 



a. Adiilt. From the Haslar Collection. 



Description of the specimen. — This species hns the body much 

 elevated, its greatest heie-ht being nearly two-thirds of f total 



