der niederen Thiere während der J. 1868—1869. 303 



brane, which forms a naked area between the branchiae and tenta- 

 cles, and they are also united on the outside by adherence to the 

 marginal fold, so that, when contracted, there are deep Chambers 

 or cavities between them. 



Ästeractis n, gen. Column versatile in form; walls firm and 

 sub-coriaceous, Disk broad, capable of invohition, bearing near the 

 mouth a circle of numeroiis simple tentacles and outside of these a 

 corresponding number of radiating rows of smalls, sessile somewhat 

 lobed and subdivided tubercles or papillae, increasing in size to the 

 margin, which is crenulate or dentate with the last tubercles of each 

 series. (Hierher wahrscheinlich auch Act. flosculifera Less. und Ou- 

 lactis formosa Duch. et Mich.) 



Auch in der Farn, der Actiniden unterscheidet Verf. eine An- 

 zahl von Untergruppen : ßunonidae (column bears tubercles or ver- 

 ruciform suckers, which are imperforate or rarely perforate, but do 

 not emit aconthia), Sagartinae (column perforated by special pores 

 for the emission of aconthia; surface smooth or with inconspicuous 

 coutractile suckers), Phellinae (column elongated, covered to near 

 the margin with a persistant epidermal layer or tunic; lateral 

 pores and aconthia few or entirely wanting) und Actininae (column 

 smooth, fleshy, destitute both of Verrucae or suckers and special po- 

 res; no aconthia; margin with or without coloured spherules), die 

 sämratlich an der amerikanischen Westküste vertreten sind. Die 

 erste Subfamilie durch die Genera Bunodes Gosse (4 Sp.), Urticina 

 Ehrbg. (= Rhodactinia Agass., Tealia Gosse mit der in der Nähe 

 der Beringsstrasse ebenso, wie an der Nordküste Europas verbreiteten 

 Act. crassicornis Zool. d.), Ev actis n. (mit Act. artemisia Drayt. und 

 A. xanthogrammica Brdt.), Gl ad actis n. [Gl. grandis n.), Cystiactis 

 Edw. et H. (1 Sp.), Anthopleura Duch. et Mich. (Ä. Bowii n.) und 

 Phymactis (2 Sp.), die zweite durch Metridium (3 Sp.), Cereus Ok. 

 (1 Sp.), Galliactis n. (C. variegata n.), Sagartia (11 Arten, unter 

 denen S. crispata, S. carcinophila, S. Panamensis, S. Bradleyi zum 

 ersten Male benannt sind), und Nemactis Edw. et H. (3 Sp.), die 

 dritte durch Phellia Gosse {Ph. inornata, Ph. rubens , Ph. Pana- 

 mensis nn. sp.), die vierte endlich durch Paractis Edw. et H. \P.? 

 nobilis n.), Epi actis n. (E. prolifera n. mit merkwürdigem Brut- 

 geschäft) und Anactis Ehr. (1 Sp.). Zur Charakteristik der neuen Ge- 

 nera die nachfolgenden Diagnosen : 



Evactis Verr. The column bears vertical rows of verruci- 

 form suckers or tubercles and is perforated by numerous openings, 

 from which water is ejected, when the body suddenly contracts. The 

 inner tentacles are smaller and shorter than the outer ones, mouth 

 with four prominent lobes. 



Cladactis Verr. (ein Namen, der inzwischen auch von 



