1J8 



DR. J. S. BOWERBANK ON SPONGES. 



[Feb. 13, 



17. Ardea sacra, Gml. 



Three young birds in different states of plumage. In one of these 

 the white colour is interrupted bj' brown longitudinal spots at the 

 end of the scapulars and wing-coverts. Another is of a dirty 

 olive-brown, intermixed with slate-coloured plumes, and with an 

 indistinct white chin- stripe. 



18. Gygis alba (Sparrm.). 



"We add a list of the 41 known species of birds of the Pelew 



Islands. 



1 



2 



3 



4, 



5, 



*6 



*7, 



*8. 



*g 



*10. 

 *I1. 



12. 



13. 

 *14. 



15. 

 = 16. 



17. 



18. 



19. 



20. 



. CoUocalia vanicorensis. 21. 



. Halcyon sanctus. 22. 



. albicWa. 23. 



, reichenbachii. 24. 



, Myzomela rubratra. 25. 



, Psamathia annce. 26. 



, Tephras Jinschi. 27. 



. Zosterops semperi. 28. 



Rhipidura lepida. 29. 



Myiagra erythrops. 30. 



Rectes tenebrosus. 31. 



Artamus leucorhynchus. 32. 



Calornis kittlitzii, 33. 



Ptilonopus pelewensis. 34 . 



Carpophaya pacijica. 35. 



Megapodius senex. 36. 



RaUinafasciata. 37. 



Rallus pectoralis. 38. 



Ortygometra quadristri- 39. 



gata, 40. 



Porphyria melanotus. 4 1 . 



Nximenius phceopus. 

 Actitis hypoleucus. 

 Tringa minuta. 



acuminata. 



Strepsilas interpres. 

 Charadrius fulvus. 



geoffroyi. 



cantianus. 



Ardea sacra. 

 Nycticorax caledonicus. 



■ goisagi. 



Anas snperciliosa. 

 Fuligida cristata. 

 Puffiniis opisthomelas. 

 Interna lunata. 

 Gygis alba. 

 Anous stolidus. 

 Phaeton candidus. 

 Dysporus piscator. 



sula. 



Carbo melanoleucus. 



[The eight species marked with an* are exchisively proper to the Pelew group.] 



5. Observations on Dr. Gray's " Notes on the Arrangement 

 of Sponges, with the Description of some New Genera." 

 By J. S. BowERBANK, LL.D., F.R.S., F.Z.S., &c. 



Previously to criticising the arrangement of the Spongiadae pro- 

 posed by Dr. Gray, it would perhaps be as well to take a rapid re- 

 view of the principles of arrangement adopted by previous writers 

 on the subject, and of the system originally proposed by me in papers 

 on the anatomy and physiology of the Spongiadse in the ' Philosophi- 

 cal Transactions ' for 1*857, p. 279, 1858, p. 747, and 1862, p. 1087, 

 and also in my * Monograph of the British Spongiadae,' published 

 by the Ray Society for the years 1864 and 1866. 



Previous writers on the Spongiadse have, with very few exceptions. 



