SPONGES COLLECTED IN PORTO RICO. 
395 
Spinosella sororia (Duchassaing et Miehelotti) Dendy. 
Tuba sororia , Duchassaing de Fonbressin et Miehelotti, 1864, p. 46, pi. vm, tig. 1. 
Siplionoclialina papyracea, 0. Schmidt, 1870, p. 33. 
Spinosella sororia, Dendy, 1890, p. 360. 
Station 6063, one specimen (dried); station 6079, one specimen. 
The dried specimen consists of eight tubes, somewhat fused, radiating from the base. Other 
specimen consists of three tubes, somewhat fused, radiating in one plane, in a fan-like fashion, from 
base. All tubes open terminally by large apertures. Typical tube 150 by 25 mm. 
Skeleton . — Spicules are slightly curved oxeas 75 to 90 p by 3 p. Main skeleton consists of a 
polygonally meshed reticulation of stout horny fiber, sparsely cored with spicules, which are much 
more abundant in the primary than in the secondary fibers. Dermal skeleton, a polygonal reticula- 
tion of slender fibers, 8 to 24 p thick; fibers cored by uniserially arranged spicules; mesh work close, 
side of mesh about equalling length of spicule. 
Inner surface of tubes marked with longitudinal veins, in which the skeletal fibers are stouter 
and make a closer reticulation than elsewhere; veins project freely round margin of terminal orifice. 
Inner surface also provided with projecting plumose bundles of spicules. Outer surface covered with 
strong spines, which project upward and outward from above-mentioned veins. 
Family HETER0RRHAPHID.£ Ridley & Dendy. 
Skeleton reticulate, never plumose. Megascleres of various forms. Microscleres usually present, 
but never chelae. 
Genus OCEANAPIA Norman (1869). 
“Sponge consisting of a central body with closed or open tubular processes (fistuke) projecting 
from it. Megascleres oxea or strongyla. Microscleres in the form of sigmata, or altogether absent. 
Skeleton usually coarsely spiculo-fibrous; with a bast-like reticulation beneath the dermal mem- 
brane.” (Dendy.) 
Oceanapia oleracea (O. Schmidt). 
Rhizoclialina oleracea, O. Schmidt, 1870, p. 35, pi. iv, fig. 1. 
Station 6079, one specimen. 
Body tuber-like, with tubular processes arising from both upper and lower surfaces. In Schmidt’s 
specimens “the flattened upper end is surrounded by tubes, dividing two or three times, and ending 
in numerous vesicular inflations clustered in rows.” In the Porto Rico specimen the upper processes 
are stout and stiff, and do not divide; vesicular inflations elongate, narrowing toward apex. The 
lower processes, “roots,” are also undivided, long, slender, and flaccid. 
Skeleton . — The only spicules are oxeas, about 140 by 5 p, with variable points; points often 
suddenly sharpened, end of spicule becoming concave; or end may taper gradually, without terminal 
concavity; or end may rarely be rounded. Spiculo-fiber forms a reticulum. Spicules very abundant 
in the fiber, also scattered in meshes of reticulum. 
Genus TEDANIA Gray (1867). 
“Megascleres of two kinds: (1) Monaetinal; smooth styli forming the main skeleton; (2) Diactinal; 
tylota, strongyla, or tornota, typically dermal. Microscleres always present in the form of hair-like 
rhaphides.” (Dendy). 
Tedania digitata O. Schmidt. 
Reniera digitata, O. Schmidt, 1862, p. 75, pi. vii, fig. 11. 
Tedania, O. Schmidt, 1870, p. 43. 
Tedania nigrescens, Vosmaer, 1887, p. 338. 
Tedania digitata, Ridley <& Dendy, 1887, p. 51, plate xi, fig. 3. 
Tedania digitata, Dendy, 1887, p. 158. 
Tedania brueei, H.V. Wilson, 1894, p. 320, pis. xix, xx. 
Mayaguez Harbor, several fragments. 
The fragments, which seem to have formed a large massive sponge, are coarsely porous, tear very 
easily, and are of a brown-yellow color. Preservation very imperfect. 
