PROC. U. S. NAT. MUS. VOL. 105 



BAYER, PL. 3 



Ifalukella yanii, new genus, new species: a, tip of branch; b, spicules; c, the colonial base. 

 Pluynigorgia wellsi, new species: d, tip of branch; e, spicules. Plumigorgia hydroides Nut- 

 ting:/, tip of branch; g, spicules. Scale between/ and d applies to both; the 0.05 mm. 

 scale applies to all spicules. 



