1868.] DR. J. E. GRAY ON THE CERATELLAD.E. 575 



12. Neoctantes niger (Pelz.), exfl. Madeira. 

 1."^. Dysithamnus schistaceus, Lafr. et d'Orb.* 



II. FormicitoriNjK. 



14. Myrmotherula fulviventris, Lawr., ex Panama et rep. .^quat. 



1.5. M. hcematonota, Sol., ex Amazon, sup. 



16. M. cinereiventris, Scl., ex Cayenna et Amazonia. 



17. M. unicolor, Menetr., ex Nov. Granada int. 



18. Formicivora strigilata, Max., ex Brasil. 



19. Cercomacra cinerascens, Sclatert, ex Peruv. orient. 



20. Percnostola fortis, Scl. et Salv., ex Peruv. orient. 



III. FORMICARIIN^, 



21. Heterocnemis simplex, Sclater, ex Surinam. 



22. Myrmeciza hemimelcena, Scl., ex Amaz. sup. 



23. M. immaculata, Scl. et Salv., ex Panama. 



24. Hypocnemis flavescens, Scl., ex Kio Negro. 



25. H. hypoxantha, Scl., ex Amaz. sup. 



26. H. melanura, Scl. et Salv., ex Peruv. or. 



27. n. hemileuca, Scl. et Salv., ex Peruv. or. 



28. Pithys bicolor, Lawr., ex Panama. 



29. Phloyopsis macleannani, Lawr., ex Panama. 



30. Fortnicarms hoffmanni. Cab., ex Costa Rica. 



31. Pittosoma michleri, Cassin, ex Panama. 



32. Grallaria hypoleuca, Scl., ex Nov. Granad. int. 



33. G. perspicillata, Lawr., ex Panama. 



34. Grallaricula costaricensis, Lawr., ex Costa Rica. 



35. G. nana (Lafr.), ex Nov. Granad. int. 



36. G. loricata, Scl., ex Venezuela. 



37. Conopophaya gutturalis, Scl., ex Nov. Granad. int. 



3. Notes ou the Ceratelladce, a family of Keratose Sponges. 

 By Dr. John Edward Gray, F.R.S., V.P.Z.S., &c. 



There have been in the British-Museum collection for several years 

 two j)lant-like sea-animals that I do not think have been described, 

 the delay having been partly caused by the difficulty that existed in 

 determining to what group of animals, if they were animals, they 

 ought to be referred. They were temporarily placed in the collection 

 with the Gorgonoid Corals ; but a very cursory examination showed 

 that they did not belong to that group ; and though the surface of the 



* The species called by this name in my American Cat. (no. 1087) has been 

 since named D. ardcsiacus, P. Z. S. 18(57, p. 736. 



t The bird thus termed in my Catalogue is C. napensis, milii, swpra, p. 572. 



