415 



pers , werden aber durch active Wanderung oder auch durch Vorschub in Folge 

 Wachsthums nach mehr distalen Theilen gebracht, um dort verbraucht zu wer- 

 den. Bläschen und Schlauch sind Wachsthums-, nicht Abscheidungsproducte. 



Lang, Alb., Zur Frage der Knospung der Hydroiden. in: Biol, Centralbl. 

 14. Bd. No. 18. p. 582—687. 

 Zurückweisung der Einwürfe von Braem. 



Maas, O., Craspedote Medusae of the Plankton. Abstr. in: Journ. R. Micr. Soc. 

 London, 1894. P. 5. p. 575—576. 

 Plankton-Expedition. — v. supra p. 186. 



Hickson, Sydney, A Revision of the Genera of the Alcyonaria stolonifera, with 

 a Description of one new genus and several new species. With 6 pis. and 

 4 cuts, in: Trans. Zool. Soc. London, Vol. 13. P. 9. p. 325—347. 



n.g. Stereosoma; nn.spp. : Clavularia Garciae, reptans, celebensis. — Classifica- 

 tion: Suborder Protalcyonaria {Haimea, Hartea), S tolonifera (C/a«M^am- 

 dae, Tubiporidae), Ale y onac e a, {Alcyo7iïdae, Helioporidae etc.), Gorganacea 

 (Sect. I. Scleraxonia, IL Holaxonia) , Pennatulacea [Peitnatulidae]. 



Browne, Edw. T., »Awelia aurita«. in: Nature, Vol. 50. No. 1300. p. 524. 

 Numerical variation. 



Sorby, H. C, Symmetry oî Aurelia aurita. in: Nature, Vol. 50. No. 1298, p. 476. 

 A few varieties occur per thousand of the normal ; two-, three- , five- und six- 

 fold symmetry. 



Heider, K., Gastrodes. Abstr. in: Journ. R. Micr. Soc. London, 1894. P.5. p. 575. 

 Sitzgsber. Ges. Nat. Fr. Berlin. — v. Z. A. 1893. p. 213. 



Bourne, Gilb. 0. , On the structures and affinities of Heliopora coerulea Pall., 

 with some Observations on the Structure of Xenia and Heteroxenia. in : 

 Proc. Roy. Soc. London, Vol. 56. No. 337. p. 299—303. 



The calicoblasts are ectodermic. The coenenchymal coeca are parts of a system 

 of inosculating endodermic canals. The growth of the colony is effected by the 

 rapid growth and multiplication of coenenchymal tubes. These and the cuticles 

 have walls common to them and to adjacent tvibes. Hence they are Coenothecalia 

 [Heliopora, Heliolites, Thecia, Plasmopera, Prepara, Lyellia and the Chaetetidae, 

 and, provisionally , Tetradiuin, Haly sites and the Monticuliporidae) \ Autothe- 

 calia have separate and distinct corallites [Tuhipora , Syringopora, Syringolites, 

 the Favositidae, and, provisionally, the Columnariadae) , Xenia and Heteroxenia 

 have also ectodermic spicules. 



Bunting, Miss M., Origin of Sex-cells in Hydractinia. Abstr. in: Journ. R. Micr. 

 Soc. London, 1894. P. 5. p. 576. 

 Journ. of Morphol. — v. supra p. 252. 



Appellor, A., Ptychodactis putida n. g. et sp. der Repräsentant einer neuen 

 Hexactinien-Familie. Mit3Taf. in: Bergens Mus. Aarbog, 1893. No. IV, 

 (22 p.) 



Fowler, G-. Herb., On two Sea-pens of the Family Veretillidae from the Ma- 

 dras Museum. With 1 pi. in: Proc, Zool. Soc. London, 1894. P. IL 

 p, 376—379. — Abstr. in: Journ. R. Micr. Soc. London, 1894. P. 5. 

 p. 576. 



Cavernularia malaharica n. sp. and Lituaria phalloides (Pallas). 



13. Echinoderma. 



Ludwig, Hub., Echinodermen (Bronn' s Klassen u. Ordnungen). 17./18.Lief. 



Leipzig, C. F. Winter sehe Verlagshdlg. , 1894. gr. 8». (p. 461—540.) 



àLfg. .^1,50, 



IL Klasse, Asteroidea, Anfang. 

 Bell, P. Jeffrey, On the Echinoderms collected during the Voyage of H, M. 



S. »Penguin« and H, M. S. »Egeria«, when surveying Macclesfield Bank. 



25* 



