Siboga-Expeditie 



XXVI bis 



( ■ 



THE PTEROBRANCHIA OF THE SIBOGA-EXPEDITION 



WITH AN ACCOUNT OF OTHER SPECIES 



BY 



SIDNEY F. HARMER, sc.d., f.r.s. 



Fellow of King's College, Cambridge, and Supevintendent of the Univeisity Museum of Zoology 



With 14 plates and 2 text-figures 





LATE E. J. BRILL 



PUBLISHERS AND PRINTERS 



I.EYDEN — 1905 



