204 PROCEEDINGS OP THE ACADEMY OP [1884. 



to the Rhaphidonemata, viz., a minimum of Kerasine (named 

 after its structure). 



Ord. iy. rhaphidonemata. 



. Fam. 1. CHALINIDA. 



Group 1. DiGITATA. 



No. 13. Ghalina oculata, Bk. A delicate growth. 



No. 25. Ghalina oculata, Bk. A form of. 



No. 28. Ghalina oculata, Bk. Has grown over woody stems. 



No. 29. Ghalina oculata, Bk. Short-branched delicate growth. 



No. 42. Ghalina oculata, Bk. Form of. 



Fam. 2. CAVOCHALINIDA. 



Group 6. ACULEATA. 



No. 22. Tuba sororia, Duchass. de Fonb. et Michel. (Spongiares 

 de la mer Caraibe, PI. 8, fig 2. Harlem, 1864. Also see "Ann." 

 1882, vol. ix, p. 277, under " Cavochalinida," W. Indian Sponges). 



No number. Tuba sororia (D. et M., PI. 8, fig. 2). Covered, 

 with empty holes, formerly the abodes of a parasitic polyp. 



Ord. Y. ECHINONEMATA. 



Fam. 1. 



Group 4. ECHINOGLATHRATA. 



No. 16. Echinoclathria ? sp. Dense mass of erect, small, 



round, short-jointed branches, polychotomously dividing and 

 ending in short processes with rounded terminations ; knotty on 

 the surface, chiefly from the presence of a small parasitic polj-p. 

 Consistence hard. Color now gray. Texture dense. Spicule of 

 one form only, viz. : acute, short, robust, sub-capitate, the shortest 

 internally and the longest echinating the fibre. Size, about 14 

 by 1 — 1800 in. (Like Glathria coralloides, Sdt., Sp. Adriat. Meeres, 

 taf. V, figs. 10 and 11.) 



No. 27. Echinoclathria ? sp. The same as No. 16, but with 



compressed interuniting branches ending in pointed terminations, 

 but no parasitic polyp. Spicule about 18 by 2 — 1800 in. 



No. 30. Echinoclathria? sj?. Fragment too insignificant 



for general description. Compressed, interuniting branches, 

 ending in pointed divisions. Consistence firm. Color light 

 sponge-yellow. Fibre short-jointed, bearing internally and exter- 

 nally capitate acuates, the latter the longest and projecting in 



