40 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Desmoprenes, new subgenus 

 Type. — Chaetodon tetracavthus Lac^pIide. 



Diagnosis. — Differs from the subgenus Scatopliagus Cuvier in the 

 color pattern, the back and sides above with dark vertical bands or 

 stripes, below with dark spots. Indian Ocean, A single species. 



SCATOPHAGUS TETRACANTHUS (Lacepede) 



Chaetodon tetracanthus Lacepede, Hist. Nat. Poiss., vol. 4, 1802, pp. 726, 727. 

 No locality. 



Scatophagus tetracanthus Gunther, Cat. Fish. Brit. Mus., vol. 2, 1860, p. 60 

 (copied) . 



Ephippus tetracanthus Fowler, Proc. Acad. Nat. Sci. Philadelphia, 1925, p 250 

 (Delagoa Bay). 



Chaetodon striatus Rosenthal, Ichthyol. Taf., Berlin, 1812-25, pi. 13, fig. 2. 



Scatophagus fasciatus CvYiER, Hist. Nat. Poiss., vol. 7, 1831, p. 144 (on 

 Commerson). 



Scatophagus muUiJasciatus Richardson, Voy. Erebus and Terror, Fish, 1844- 

 48, p. 57, pi. 35, figs. 4-6. King George's Sound, Australia. — Gxjnther, 

 Cat. Fish. Brit. Mus., vol. 2, 1860, p. 60 (type, Sydney, Cape York).— Stein- 

 DACHNER, Sitz. Ber. Akad. Wiss. Wien, vol. 56, Heft 1, 1867, p. 310 (Cape 

 York). — Alleyne and Macleay, Proc. Linn. Soc. New South Wales, vol. 1, 

 1876, p. 277 (Cape York and Hall Sound). — Castelnau, Proc. Linn. Soc. 

 New South Wales, vol. 3, 1878, p. (350) 376 (Port Jackson). — Klxtnzinger, 

 Sitz. Ber. Akad. Wiss. Wien, vol. 80, Heft" 1, 1879, p. 363 (Port Darwin, 

 Port Denison, Cleveland Bay). — Macleay, Proc. Linn. Soc. New South 

 Wales, vol. 8, 1883, p. 370 (Lower Burdekin River, Queensland). — McCul- 

 LocH, Austral. Zool., vol. 2, pt. 2, 1922, p. 90, pi. 26 (New South Wales). 



Ephippus muUiJasciatus Fowler, Proc. Acad. Nat. Sci. Philadelphia, 1923, 

 p. 44 (Victoria). 



Scatophagus aetate-varians De Vis, Proc. Linn. Soc. New South Wales, vol. 

 9, 1884 (1885), p. 456. Queensland coast. — Kent, Great Barrier Reef, 

 1893, p. 284 (369), pi. 47, fig. 4 (Queensland). 



Scatophagus semistrigatus Kent, Great Barrier Reef, 1893, p. 370. Queens- 

 land. (Nomen nudum). 



Scatophagus argus (part) Barnard, Ann. South Afric. Mus., vol. 21, pt. 2, 

 Oct. 1927, p. 618 (Delagoa Bay). 



Differs from Scatophagus argus in the presence of 6 to 17 dark 

 vertical bands on the back. Though the type was but 188 mm. 

 long, McCulIoch says the species reaches 408 mm. 



East Africa, New Guinea, Australia. 



30622 U.S.N.M. New Guinea. Australian Museum. Length 93 to 97 mm. 

 Two examples. Both with 7 dark vertical lines and few dark spots on lower 



Family CHAETODONTIDAE 



Body strongly compressed, elevated, suborbicular in outline. Mouth 

 small, protractile, terminal. Eyes moderate, lateral. Maxillary very 

 short, variable, divided by longitudinal suture. Teeth brushlike or 

 setiform, often extremely long, in narrow bands in jaws; palate 



