BY WILLIAM A. HASWELL, M.A., B.S.c. Gil 



internally to the bases of the parajDodia. They are widest in the 

 middle, pointed at either end, the one end opening externally in 

 the position described, and the inner ending blindly, the internal 

 aperture being situated in the middle of the wider central part 

 of the organ. 



Postscript. 



Since the above was written I have received a copy of the 

 Supplement to Claparedes " Annelides Chetopodes du Grolfe de 

 Xaples" (Geneve et Bale, 1870), and find that in his description 

 of Hermadion fragile he states — " A la base des pieds du cote 

 ventral, non loin du bord posterieur, je trouve ime preeminence 

 conique (fig. 2, b.) percee d'une orifice. Cette ouverture conduit 

 dans un canal cilie qu'on pent poursuivre jusque dans I'interieure 

 des pieds oii il est bientot voile par la masse des elements repro- 

 ducteurs. C'est la evidemment I'ouverture de I'orgaue segmen- 

 taire."* The true position of the external apertures of the 

 segmental organs in the JPolynoina was, therefore known, as 

 regards this species at least to the distinguished author of the 

 memoir above quoted, but his observations on this point have been 

 overlooked both by Huxley and by Pagenstecher ; and hp himself 

 seems not to have been aware of the universality of the arran^-e- 

 ment he describes, as he makes no mention of the ventral tubercle 

 or its central canal in his account of the other species of the family. 



XOTES AlfD exhibits. 



Mr. W. A. Haswell exhibited drawings of the earlier stages in 

 the development of Phoronis aust rails. Mr. Haswell also 

 exhibited a coral which he had recently found in Port Jackson. 

 "With reference to this exhibit the Eev. J. E. Tenison- Woods 

 stated that it was a Flesiastnea, which he was inclined to regard 



* L. c, p. 16. 



