Quarterly Journal of Microscopical Science (Volume 19 ) (Paperback)

This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1879. Not illustrated. Excerpt: ... MEMOIRS. /notes on some of the Reticularian Rhizopoda of the "challenger" Expedition. By Henry B. Brady, F.R.S. With Plate VIII. II.--Additions to the knowledge of Porcellanous and Hyaline types. In a former paper (' Quart. Journ.' for January) a brief notice was given of a few of the more interesting types of Arenaceous Rhizopoda occurring in the dredged stuff brought home by Sir C. Wyville Thomson and the scientific staff of the "Challenger" Expedition, and I propose now to describe a limited number of forms pertaining to other groups of the Foraminifera, concerning which fresh facts have been gathered, tending to elucidate the natural history of the order. Porcellanea. In no section of the subject has so little that is new been elicited from the "Challenger" results as in the Family Miliolida of Carpenter, Parker, and Jones. Abundance of large Biloculince and the like are of course to be found in the Globigerina-ooze of deep-sea bottoms, and there is considerable variety in the forms furnished by some of the shallower dredgings from the tropics, but there is no such range of well-marked modifications of the common types as one would be pretty sure to meet with, for example, in material from depths of five to fifty fathoms in the Red Sea; and as few or no shore-sands were collected during the expedition, there is a comparative absence of even the common littoral species. The Miliolida are to be regarded as essentially a shallow-water and littoral group. It is true that the very largest examples of certain genera are found amongst the Globiyerina-muA of 1000 to 2000 fathoms, or even at greater depths, but the species so occurring are very limited in number, and the specimens as a rule comparatively few, whilst in shallow water and in shore-sands even the deep-s...