28 



ACALETIIS IN GENERAL. 



Part I. 



S E C T I N V . 



EilBRYOLCXilCAL liESEAliCHES Ul'ON AC'ALEl'IIS. 



The history of the successive steps ^vhich have led to a full knowledge of the 

 reproduction and mode of development of the Medusas exhibits some of the most 

 interesting features in the annals of scientific discoveries, on account of the pecu- 

 liarity of the facts hrought to light in the course of the investigation not only, 

 but also because the progress has been so very slow and gradual that it discloses, 

 more clearly than most other subjects, the care, the patience, and the unrelenting 

 2)erseverance, Avith which natural phenomena ought to be traced, in order to secure 

 satisfactory results. 



As I have already enumerated the niunerous papers relating to the Eml)ryology 

 of Acaleplis in an(_)ther part of this Avork,^ I shall limit m\'self here to a 1)rief 



volume of tliis Avork ; to wliicli may be aililc<l : 

 COLDSTIIEAJI (John), Article Acalcijlia- in Toilirs 

 Cyclop, of Anat. ami Pliys. 18.j5, 8vo. ; Milne- 

 Edwauds Lemons sur la I'liysioluiiie ct rAnatomie 

 compaive ilu I'liomme ct dr.< aiiiiuaiix, Paris, IS.'iT- 

 18j0, 4 vols. 8vo. — Cakcs (A'.), Icoiics Zoo- 

 toraiea', mit Original-Beitriigen von Allman, Gegen- 

 bauer, Iluxlcy, Kijllikor, Miillur, Scluiltze, Sifbokl, 

 uml Stuin, Leipzig, 1857, fol. ; and GicciENUAUEU 

 (C), (inmdziige der vergieielienden Anatomic, Leip- 

 zig, 18.J'J, 1 vol. 8vo. 



' See vol. 1, p. G9. To the works tlierc quoted 

 m.iy be added : Hassall (A. IL), Catalogue of 

 Irish Zciuphytes, Ann. and Mag. Nat. IIi.st. 1841, 

 vol. 8. — Steenstrup (J. J. Sm.), Ilntersuchungen 

 liber da.s Vorkommen des Ilerniapliroditismus in 

 der Natur. aus dcin Diinisclicn von Dr. C. F. 

 Ilornsclmcli. Greifswald, 184G, 4lo. fig. — Van 

 Benedex (P. J.), Un mot sur le mode de rcjiro- 

 duction des animaux inlci-ieurs, llullt'tins Acad. 

 Koy. de Belgique, 1847. — Ueiu (.Ioiin), Oliser- 

 vations on the Development of the jMcdus;v, Ann. 

 and Mag. Nat. Hist. 1848, vok 1, p. 2.").— (;ii.es 

 (Edw.) and Ceakke (W. P..), A few Remarks 

 upon a Species of Zoophyte discovered in the New 



Docks of Ipswicdi, Ann. and Mag. Nat. Hist. 1840. 

 vol. 4, p. 20. — Mi'i.LEU (J.), Archiv fiir Anat. 

 und Phys. 18"i2, p. ;j2, (in the jiaper on the origin 

 of shells in Ilolothuria.) — TiiOMfsox (W.), On 

 the Analogy between the Processes of IJeiiroduetiou 

 in the Plant and in the Ilydroid Zoophyte, Ann. 

 and Mag. Nat. Hist. 18.J4, XIV. p. .Gl.-;. — Bcu- 

 MEISTEK (IL), Zoononiisehe Briefe, Leipzig. 18.56, 

 2 vols. Bvo. See vol. 1, p. 139. — Peach (C. W.), 

 Notice of a curious Metamorphosis in a Zociphyte- 

 like animal, Edinli. New Phil. Journ. I.s5(j, vol. 4. 

 — Sai;s (j\l.). Einige Worte liber die Entwickehmg 

 der Medusen, Wiegmann's Archiv of Nalurg. 1857, 

 I. }). 117. — Dalyell (Snt John G.), On the 

 Propagation of Scottish Zooidiytes, Edinb. New 

 Phil. Journ. 1804, vol. 17, and 18.00, vol. 21.— 

 Gecenbauei; (K.), Ziir Lehre vom Generations- 

 wechsel und der Fortpllauzung bei Medusen und 

 Polypen, Wiirzlnirg, 1854, 8vo. tig. — AVkigiit (.J. 

 J.), On the Peproduction of C3ili|ipc pomiformis, 

 Edinb. New Phil. Journ. 1850, vol. 4, p. So.— 

 Observations on British Zoophytes, Edinb. New 

 Phil. Journ. 1857-1850. — On Ilydractinia echinata. 

 1857, Ediid). New Ph. Journ. — GossE (Tn. II.), 

 Naturalist's Rambles on the Devonshire Coast, Lon- 



