546 Porifera. 
Spieula glatt oder dormig. Amphidisken mit glatten, gezackten oder 
eingeschnittenen Rändern. 
Beisp. E. fhuwwiatilis. 
Lamouroux gab folgende Diagnose: „Polypier fluviatile, spongiforme, verdätre, en masse 
allongee, lobee ou glomerulse (237 p. 323). 
Genus Ill. Tubella Carter 1881. 
[tubella. | 
(Taf. XXVI, Fig. 1.) 
Synon. Spongilla p. pP. 
Stabnadeln glatt oder gedornt. Scheiben der Amphidisken sehr un- 
gleich gross. Süd-Amerika. 
Beisp. T. paulıla (Bwk.) Ortr. [= Spongilla paulula Bwk.]. 
Carter's Diagnose lautet: „‚Skeleton-spieule curved, fusiform, sharp-pointed or rounded 
at the extremities, smooth or spined. Statoblast globular or elliptical; aperture lateral or 
terminal; crust composed of the granular microcell -substance mentioned, charged with in- 
aequibirotulate spicules — that is, a little trumpetshaped spieule having a straight shaft which 
is smooth, spined or inflated, or both, terminated by a large disk at one, and a small one or 
an umbonous, circular, marginally spined head at the other end; the former applied to the 
chitinous coat, and the latter forming part of the surface of the statoblast.“ (82, p. 96) 
Genus IV. Parmula Carter 1881. 
[parmula, kleines Schild.] 
(Taf. XXVL, Fig. 2.) 
Synon. Spongilla p. p. 
Stabnadeln glatt. Skelet der Gemmulae besteht aus domigen «c.? 
und kleinen Schildehen. Süd-Amerika (Amazonen-Strom). 
Beisp. P. Batesü (Bwk.) Crtr. [= Spongilla Batesüt Bwk.]. 
Die Original-Diagnose lautet: „‚Globular or elliptical, fusiform when growing round the 
small immersed branches of trees. Structure evarsely reticulate, extremely hard and rigid, 
rising into thorn-like processes on tlıe surface. Colour light green. Skeleton-spicule acerate, 
curved, fusiform, abruptly sharp-pointed, smooth. Statoblast globular, large, more or less 
tubereular on the surface; aperture infundibular; crust composed of granular microcell-sub- 
stance, charged with and surrounded by minute, spinous, acerate spicules, limited by a layer 
of parmuliform spicules, both internally and externally, the former in contact with the 
chitinous coat, and the latter on the surface of the erust.“ (82, p. 98). 
Genus V. Heteromeyenia Potts 1882. 
(Taf. XXVIIL, Fig. 3.) 
Stabnadeln gedornt (ac.? sp... Gemmulae mit zwei Nadelsorten: 
1. Amphidisken mit gezackten Rändern der Scheiben und gedorntem 
Schaft; 2. Grössere mit 6-—- 8 zurückgebogenen Haken statt Scheiben. 
(ane.??) Nord-Amerika (Delaware River). 
Beisp. (1 Spee.) H. Pyderi Potts. 
Potts beschrieb (Proc. Philadelphia 1882, p. 13) einen neuen Süsswasserschwamm, für 
welchen er den (rattungsnamen Heteromeyenia schuf, gab aber keine Diagnose. 

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