■^ SQUAWIPINNES. 



1. Specifs with larpe or moderately large scales, not exceeding: fi%-five 

 transverse series. 



A. With nioj-e tlian ten dorsal spines. 



1. With more than three anal spines. 



1. Chaetodon strigangulus. 



C'lia'todon stripanjiidus, (SoJamhr) (Im. p. 1209; C'uv. S^- Vol. \n. 



p. 42. pi. 172 ; Bn-vheifn Voycu/c, ZooUx/ij, p. 00. pi. 17. f. 2 ; Bleek. 



liunda, i. p. 2-39. 

 triauj,mlaris, Riijoi). Atlas, Fisclte, p. 42. pi. 9. f. 3. 



I). |i. A. ~. L. lat. 26. L. trausv. 5/16. Vert. 10/14. 



The snout is not produced, and nearl}^ equal in length to the dia- 

 meter of the eye. The soft dorsal is produced into an acute-angled 

 lobe. The ocular band rather narrower than the eye and white- 

 edged ; body A\-ith about twenty-five blackish stnpes, angularly bent, 

 with the angle pointing forwards. Caudal black, with whitish mar- 

 gin ; the dorsal and anal fins with a fine black marginal line ; ven- 

 trals whitish. 



From the lied Sea to Polynesia. 



«. Fine specimen. Amboyna. Purchased of Mr. Frank. 

 h. Adult : skeleton. Amboyna. Purchased of Mr. Frank. 

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



The intestinal tract makes a great many convolutions. The air- 

 Ijladder is divided into a large posteiior portion and into a smaller 

 an+erior one. The anterior emits two small processes. 



Skeleton. — The skeleton of this and the other species of CIkx- 

 fodon shows several very remarkable modifications of the structure 

 of some bones of the skull. The maxillary has so irregular a form, 

 that no description can give an adc(juatc idea of it ; two portions 

 can be distinguished, a superior and an inferior, separated from 

 each other by the narrower and slightly bent middle of the bone. 

 A very long process, directed forwards, extends from the palatine 

 bone across the centre of the maxillary. The anterior portion of 

 th(^ intermaxillary, in which the teeth are implanted, is much 

 swollen ; the posterior process is much longer than the descending 

 branch. The mandibula also is swollen and very solid. The.up})er 

 portion of the skull appears as one solid, elevated, rounded, smooth 

 bony mass, without any ridges or grooves. The sutures between the 

 principal frontal bones and the supraoccipital alone are visible. The 

 supraocci])ital is continued posteriorly in the strong occipital crest, 

 which has the upper margin swollen, and extends on to the first 

 interneural. 



The infraorbital ring is moderately developed, and becomes gra- 

 dually narrower posteriorly. The praeoperculum is smooth, with a 

 very rudimeutaiy muciferous channel behind the interior ridge, which 

 is scarcely elevated ; the inferior limb is rather shorter than the pos- 

 terior. The operculum is subquadrangular,-not quite twice as high 



