6. HLYPHIDODON. -^ 



ring below the centre of the eye is one-third of the greatest breadth 

 of the praeorbital. The soft dorsal fin is produced into a point, the 

 fourth and fifth raj-s being the longest ; caudal fin forked. Body 

 with five blackish cross-bands, which are not broader than the inter- 

 spaces between them : the first from before the origin of the spinous 

 dorsal to the base of the pectoral fin ; the second from the fourth, 

 fifth and sixth dorsal spines towards the middle of the ventral fin ; 

 the third from the tenth, eleventh and twelfth dorsal spines towards 

 the anal spines ; the fourth from the middle of the soft dorsal to the 

 middle of the anal ; the fifth across the middle of the free portion 

 of the tail. 



From the Red Sea thi'ough all the Indian Seas to Polynesia. 



Var. a. (?. ccelestinus. The caudal fin has a blacldsh streak along 

 each lobe. 



a. Half-grown. Hong Kong. Presented by Sir J. C Bowring. 



b. Adult. From the Collection of the Zoological Society. 



c. Half-grown : skin. From Gronow's Collection. 



Var. /3. G. rahti. The caudal fin is uniform transparent, or black- 

 ish on the basal portion. 



d-i. Half-grown and young: skins. Pinang. From Dr. Cantor's 



Collection. 

 k. Young. Pinang. From Dr. Cantor's Collection. 

 /. Half-gro'mi : skin. China. Presented by J. R. Peeves, Esq.* 

 m. Young. China. Presented by Vice-Admiral Sir E. Belcher, C.B. 

 n-]}. Fine specimens. Amboyna. Purchased of Mr. Frank. 

 q. Half-grown. From Dr. P. v. Bleeker's Collection. (G. waigi- 



ensis.) 

 r. Half-grown. From Dr. P. v. Bleeker's Collection. (G. quadri- 



fasciatus.) 

 s. Many young specimens. India. 

 t. Half-grown : bad state. Old Collection. 



Whilst I cannot hesitate to consider G. rahti and G. ccelestinus as 

 individual varieties of one and the same species, G. luaigiensis may 

 be really different, and distmguished by a more elevated body, the 

 depth of which is three-fifths of the total length (the caudal fin not 

 included) ; it has been described by Quoy & Gaim. Voy. Uran. Zool. 

 p. 391, and by Cuv. & Val. v. p. 457. The following specimens in 

 the British Museum Collection appear to belong to this species or 

 variety : — 



a. Half-grown. Sandwich Islands. From the Berlin Museum. 

 h. Half-grown : stuffed. 



* It is very probable that this is the specimen mentioned by Sir J. Richardson 

 as Gli/pkisodon tyrwhifti {I. c.) ; its teeth ore in a single series as in the other 

 Glyphidodonts ; and we suppose that Sir J. Richardson considered the broad- 

 toothed Cliinese species (G. srpfemfa/trinfiis) as G. crfrffinti!'. which, in fact, has 

 the Icelh as narrow and slender as in G. ^.x-afi/ix. 



