23 HKNRY B. BRADY. 



contain numberless specimens, but because they belonged 

 invariably to species represented plentifully in the coarser 

 siftings. When there was anything to be gained by doing 

 so it was examined either in water or dry, and balsam 

 mountings were made from it. The material thus washed 

 was sorted by successive siftings, and worked over little by 

 little under a power of about twenty diameters. It is not 

 with the very minute forms that we are concerned in the 

 present paper, but rather with some of the larger types, par- 

 ticularly those which build for themselves composite tests, 

 consisting of sand or other foreign bodies, more or less embed- 

 ded in calcareous cement or adherent to a chitinous envelope. 

 Until comparatively recent years but little was known of 

 the larger arenaceous Rhizopoda. The discovery of Astro- 

 rliiza Umicola by Sandahl in 1857 remained unnoticed until 

 attention was drawn to it by the late M. Sars, and before 

 that time probably Lituola Soldanii was the largest known 

 living member of the group, whilst amongst fossils the Creta- 

 ceous Lituola [Haplophragmium) irregulare held a similar 

 position. 



In 1867 the elder Sars discovered Rhahdanimina and Sac- 

 cammina in deep water off the coast of Norway, and though 

 neither of them were described or figured in hismemoir,^ the 

 kindness of his son. Professor G. O. Sars, in distributing 

 specimens, has left no difficulty as to their identification. 

 The cruise of the " Lightning" in 1868 and of the " Porcu- 

 pine" in 1869 and the succeeding years, brought to light a 

 considerable series of types not previously known. Some 

 account of these may be found in Dr. Carpenter's 'Micro- 

 scope and its Revelations' (fifth ed., pp. 530 — 538), and in 

 a pamphlet^ prepared for a soiree of the Royal Microscopical 

 Society of London by the same author, and again in a short 

 paper on the Genus Astrorhiza,^ published some time ago in 

 this Journal. The most prominent of the new genera so 

 described are Pilulina and Botellina, together with a fusiform 

 type assigned to Williamson's genus Proteonina,^ and a 

 " Nautiloid Lituola^'' since named by myself Cyclammina. In 



1 "Fortsatte Bemserkuinger over det dyriske Livs Udbredning i Havets 

 Dybder," ' Vidensk.-Selsk. EorhaudlingeiV 'or 1S68. 



2 ' Descriptive Catalogue of Objects from Deep-sea Dredgings, exhibited 

 at the Soiree of the Royal Microscopical Society, King's College, April 

 20th, 1870, by Dr. Carpenter, F.R.S., &c.' 



^ " On the Genus Astrorhiza of Sandahl, lately described as Haecke- 

 lina by Dr. Bessels," by W. B. Carpenter, M.D., C B., F.KS., 'Quart. 

 Jouru. Mic. Sci./ N. S., vol. xvi, pp. 221 — 221, pi. xix. 



* Since separated from that genus on good grounds by the Rev. A. M. 

 Norman, who has given it the name of Marsipella. 



