. Guide leaflet. \*i\ FIG- 23—A REMARKABLE VASE-LIKE MONAXONID SPONGE From Santa Lucia, W. I. (Height 31 \ inches). 243 244 THE AMERICAN MUSEUM JOURNAL projections]on its surface, and for its very fragile texture. Othernoteworthy specimens belonging to this order are as follows: Spongilla sp. (illustrated on page 231.)—This is an example ofthe fresh-water sponges which form the only exception to therule that sponges are marine animals. In color it is usuallyyellowish, often tinged with green or brown. It is universallydistributed in streams and ponds. Pachychalina.—This genus consists of usual
. Guide leaflet. \*i\ FIG- 23—A REMARKABLE VASE-LIKE MONAXONID SPONGE From Santa Lucia, W. I. (Height 31 \ inches). 243 244 THE AMERICAN MUSEUM JOURNAL projections]on its surface, and for its very fragile texture. Othernoteworthy specimens belonging to this order are as follows: Spongilla sp. (illustrated on page 231.)—This is an example ofthe fresh-water sponges which form the only exception to therule that sponges are marine animals. In color it is usuallyyellowish, often tinged with green or brown. It is universallydistributed in streams and ponds. Pachychalina.—This genus consists of usually elongate,finger-like and branching sponges in which the spicules are buriedin a horny coating of spongin. The numerous excretory openings,or oscula, are conspicuously scattered over the external FIG. 24—THE STOLON-BEARING SPONGE {Siphonochalina stolonifera Whitfield)A peculiar adaptation of the branching habit. Siphonochalina.—This is closely related to the precedinggenus, but consists of a group of tube-like individuals varyingin form, and with spongin of somewhat paper-like genus is represented by several species, of which Siphono-chalina stolonifera Whitfield is the most remarkable. This beau-tiful sponge is illustrated in the above cut of the type~ consists of a number of tubes with crown-like summits, growing [30]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
