526 ZOOPHYTA. SPONGIAD^. Spongia. 



their summit ; tne surface granulated." — Mcnt. Wern. Mem. ii. 84. t. vii 



Deep water, Devonshire. 



2. S. ramosa — " Palmated, and digitated round the top." — ib. 84. t. viii.-ib- 



3. S. conus " With numerous, short, flattish divarications issuing from the 



sides."— ib. 85. t. x — ib, 



4. S. lobata. — " With clustered, ovate divarications." — ^ib. 85. t. ix. — ib. 



5. S. perlcevis. — " Form indeterminate, texture close, surface covered with 

 obtuse papillae."— ib. 86. ib. 



6. S. aurea.—'''' Broad, flat, and slightly divided at the top. ib 86. 



7. S. rigida, — " With obtuse spreading, irregular flattish divarications, 

 arising from the same base ; usually a short stalk." — ib. 87. t. xi. f. 1, 2 ib. 



8. S. penieellm. — " With a yellowish gelatinous base, supported by inter- 

 nal spicula, and having on its surface white flexible spongy tubes." ib. 93. 



t. xiii. f, 7— ib. 



9. S. Icsvigata — " Soft, compressible and elastic ; texture extremely fine, 

 and reticulated." — ib. 95. t. xvi. f. 4 — ^ib. 



10. S. ananas. — "Ovate, rugous, tubular, the summit crowned with spines 

 surrounding the aperture." — ib. 36. t. xvi. f. 1, 2 ib. 



11. S. limbata — " With the fiibres formed into larger and smaller circular 

 pores, resembling lace." — ib iii. t. xv. f. 2, 3 ib. 



12. S.fragilis — "Fragile, friable, coarsely reticulated ; the fibres rugose, 

 as if covered with minute sand." — ib. 114. t. xiv. f. 1, 2 ib. 



13. S. plumosa.^-'- Irregular, rather soft and tough when deprived of its ge- 

 latinous flesh, somewhat resembling compressed tow." — ib. 116. — ib. 



14. S. coriacea.—" Shape' indefinite, wrinkled, and cavernous, not unlike a 

 piece of burnt leather." — ib. 116. 



EXTINCT SPECIES. 



1. S. ramosa — Thinly branched ; nearly cylindrical. — Parle. Org. Rem. ii. 



91. t. vii. f. 12 — Mant. Geol. 162. t. xv. f. 11 In Chalk. 



2. S. lobata. — Irregularly subcylindrical rounded lobes. — Park. Org. Rem. 



92. t. vii. 6— In Chalk. 



3. S. Townsendi — Cyathiform, containing a conical cavity ; substance po- 

 rous ; base enlarged, with diverging processes of attachment Wiltshire, Al- 



cyonite. Park. Org. Rem. ii. 125. front. — Spongus Town. Mant. Geol. 164. 

 t. XV. f. 9.— Chalk. 



4. S. hemisphcerica. — Hemispherical turbinated, or subcylindrical ; the supe- 

 rior surface marked with flexuous depressions ; base perforated.— Spongus lab. 

 Mant. Geol. 160. t. xv. f. 7.— In Chalk. 



5. S. radiatus. — Funnel-form ; externally with cylindrical, diverging, anas- 

 tomosing fibres ; meshes elongated ; internally with perforated papiUae. — Ven- 

 triculites radiatus, Mant. Geol. 168. t. x. — In Clialk. 



6. S. alcyonoides. — Conical or disciform ; meshes circular.— -Alcyonite, Park. 

 Org. Rem. ii. 213. t. x. f. 12 — Ventriculites alcyon. Mant. Geol. 176. 



7- S. quadrangvJaris. — Inversely conical cyathiform ; quadrangular ; the 

 meshes very minute.— Ventriculites quad. Mant. Geol. 177. t. xv. f. 6.— In 

 Chalk. 



