618 DR. R. VON LENDENFELD ON THE SYSTEMATIC [DcC. 21, 



639. Haeckel, E. Die Physemarien {Haliphysema und Gastrophysema), 



Gastrseaden der Gegenwart. Jen. Z. Nat. JBd. xi. pp. 1-54 (1877). 

 [640.] . On Physemaria &c. Nature, vol. siv. p. 685 (1877). 



641. Hagenow, F. Monographie der Riigensclien Kreide-Versteinerungen. 



Neues Jahrb. Mineral. Geol. (1839-40). 



642. Hahn, O. Die Meteoriten (Ohondrite) und ihre Organismen. Tiibingen 



(1880). 



643. Hall, J. Obseryations upon the Genera Upkantania and Bictyophyton. 



\&h Annual Bep. State Cabinet Nat. Hist. New York (1863). 



644. . Note on the occurrence of Astylospongia in the Lower Helder- 



berg Eocks. \&th Annual Bep. State Cabinet Nat. Hist. New York, 

 pp. 69-70 (1863). 



645. . Descriptions of the Fossil Reticulate Sponges constituting the 



Family Dictyospongidae. Beport of the New York Scientific Museum, 

 1884, pp. 465-481 (1884). 



646. . On the Fossil Reticulate Sponges constituting the Family Dictyo- 



spongidffi. Bep. Brit. Assoc. 1884, pp. 725-726 (1884). 



647. Hancock, A. On the Excavating Powers of certain Sponges belonging 



to the genus Cliona, with descriptions of several new species and an allied 

 generic form. Ann. M. N. H. ser. 2, vol. iii. p. 321 (1849) . ; 



648. . Note on the Excavating Sponges ; with descriptions of four new 



Species {Cliona). Ann. M. N. H. ser. 3, vol. xix. pp. 229-242 (1867). 



649. . Notes on the Excavating Sponges ; with descriptions of four new 



Species (Cliona). Tr. Tyncs. N. Club, n. ser. vol. i. pp. 337-353 (1867). 



650. Hano'W, M. C. Erlauterungen der Merkvriirdigkeiten der Natur. 1. 



Danzig (1737). 



651. Hansen, G. A. Spongiada. The Norwegian North Atlantic Expedition, 



(1885). 



652. Hardwicke, T. Description of a Zoophyte, commonly found about the 



Coast of Singapore Island (Spongia patera). Asiatic Bescarckes, vol. xiv. 



p. 180 (1822). 

 [653.1 . Svirla,Spo7igia patera, Feruss. Bull. Soc. Nat. torn. viii. p. 165 



(1826). 

 654. Harting, P. Bijdrage tot de keitnis der mikroskopische fauna en flora 



van de Banda-Zee. Ferh. d. K. Akad. Wetensch. vol. x. p. 1 (1865). 

 655. . M6moire sur le genre Poterion. Naturh. Verh. Utrecht, vol. ii. p. 2 



(1870). 



656. Harmer, S. F. On a method for the Silver-staining of Marine Objects. 



MT. z. Stat. Neap. 1884, p. 445 (1884). 



657. Haswell, W. A. On Australian Freshwater Sponges. Proc. Linn. Soc, 



N. S. W. vol. vii. pp. 208-210 (1882). 



[658.] . On Australian Freshwater Sponges. (Abstr.) Nature, vol. xxvii. 



p. 91 (1882). 



659. Hatchett, C. Chemical Experiments of Zoophytes. Phil. Tr. 1880, 



p. 327 (1880). 



660. Heider, A. v. Die Gattung Cladocora. SB. Ak. Wien, Bd. Ixxxiv. 



p. 634 (1882). 



661. Heider, K. Zur Metamorphose der Oscarella lobularis. Arb. Z. Inst. 



Wien, Bd. vi. Heft 2, pp. 175-236 (1886). 

 [662.] . Metamorphoses of Oscarella lobularis. (Abstr.) J. B. Micr. Soc. 



vol. vi. pp. 807-809 (1886). 

 663. Herklots, J. A., et W. Marshall. Notice sur deux especes nouvelles 



d'eponges de la famiUe des Lophospongiae {Hyalothauma ludekingi, 



EujilecteUa ludekingi). Arch. Neerl. {Haarlem), vol. iii. pp. 435-438 



(1868). 



