80 BIBLIOGEAPHY. 



Carter. — ' On the Form and Structure of Operculina Arabica.' 



Ann. Nat. Hist., 1852. 

 Willia:>ison. — Various papers published in Quart. Journ, Micr. Sci. 



d. FORAMINIFERA ; FoSSIL FoRMS. 



Ehrenberg. — 'Ueber den Griinsand und seine Erlanterung des 



Organischen Lebens.' Abhandlungen der Konigl. Akademie 



der Wissenschaften zu Berlin, 1855. 

 Egger. — * Die Foraminiferen der Miocan-Schichtenbei Ortenburg in 



Nieder-Bayern,' 1858. 

 Pictet. — 'Traite de Pale'ontologie,' 1857; and the 'Cours Ele'men- 



taires de Pale'ontologie,' and ' Prodrome de Paleontologie,' of 



D'Orbigny. 

 Other memoirs are indicated in the bibliography appended to 



the monograph of Williamson, above referred to. 



POLTCYSTIXA and TH.aASSICOLLID/E. 



MuLi.ER, J. — ' Ueber die Thalassicollen, Polycystinen und Acantho- 



metren des Mittelmeeres.' Ab. d. K. Akad. Berlin., 1858, and 



Quart. Journ. Micr. Sci., 1856. 

 HrxLEY.— ' On Thalassicolla.' Ann. Nat. Hist., 1851. 

 For information on the fossil Polycystin^e see Ehrenberg, 



* Mikrogeologie,' 1854; Ab. d. K. Akad. Berlin, 1846-7, and 



Ann. Nat. Hist., 1847. 



SPONGTD^. 



BowERBANK. — ' On the Anatomy and Physiology of the Spongiadae :' 

 Phil. Trans., 1859. ' On the Vital Powers of the Spongiadae :' 

 Reports of the British Association, 1856-7; and other papers 

 in Ann. Nat. Hist., 1 841-2-5; and Quart. Journ. Micr. Sci., 

 1859. 



Hl'xley. — 'On the Anatomy of the genus Tethya.' Ann. Nat. 

 Hist., 1851. 



Johnston. — • History of British Sponges and Lithophytes,' 1842. 

 Also: Carter, Ann. Nat. Hist., 1848-9-54-7; Lieberkuhn, 

 Mailer's Archiv, 1856-7, and Ann. Nat. Hist., 1856; Dobie, 

 Goodsir's Annals of Anatomy and Physiology, 1852; Han- 

 cock, Ann. Nat. Hist., 1849; Morris, do. do.; Owen, 

 Transactions of Zoological Society of London, 1841 ; Gray, 

 Ann. Nat. Hist., 1858. An account of the older memoirs oni 



