284 Leuckart: Bericht üb. d. Leist. in d, Naturgeschichte 



ausser Berücksichtigung geblieben sind. Dass der In- 

 halt auch ohnehin überreich ist, — die Zahl der beschrier 

 benen Arten ist von 61 (bei Jo h n s to n)' auf 169 gestie- 

 gen — erhellt am besten aus der nachfolgenden Ue- 

 bersicht : 



Subord. T. Athecata. Hydroida destitute of triie thecae or 

 protective cases, either for the polypites or gonophores. 



Farn. 1. Glavidae. Polypites claviform or fusiform, with scat- 

 tered filiform tentacitla. 



Clava Gmel. 6 Spec, Tubiclava Allm. 2 Sp.. Tiirris Less. 1 Sp. 

 (Turr. neglecta Less. mit Clavula Gossii Str. Wr.), Cordylophora 

 1 Spec. 



Farn. 2. Hydractinüdae. Polypides claviform, sessile, with a 

 Single verticil of filiform tentacles round the base of a conical pro- 

 boscis, borne on an expanded and continuous crust; the coenosarc 

 naked above. 



Hydractinia van Bened. 1 Sp. 



Farn. 3. Podocorynidae. Polypites sessile with a single verticil 

 of filiform tentacula round the base of a conical proboscis. Coe- 

 nosarc consisting of a network of creeping fibres, clothed with the 

 polypary. 



Podocoryne Sars 3 Sp. (P. proboscidea n.) , Corynopsis Allm. 

 1 Sp., Cionistes Wr. 1 Sp. 



Farn. 4. Laridae. Polypites with a very small number of 

 filiform tentacula, springing from the base of the proboscis, but not 

 forming a circle round it. 



Lar Gosse 1 Sp. 



Fam. 5. Corynidae. Polypites with capitate tentacula, scattered 

 or in several whorls. 



Coryne Gaertn. 5 Sp.. Syncoryne 5 Sp., Zancla Gegenb. 1 Sp. 



Fam. 6. Staurüdae. Polypites clavate subcylindrical, with 

 true andlfalse tentacula, the former capitate, and disposed in one or 

 more verticils; the latter rigid, without capitula and probably ser- 

 ving as tactile organs. 



Cladomena Duj. 1 Sp. (Cl. radiatum Duj, mit Coryne stauridia 

 Gosse), Stauridium Duj. (St. productum Wr. mit Coryne cerberus 

 Gosse.) 



Fam. 7. Clavatellidae. Polypites with a single verticil of ca- 

 pitate tentacula surrounding the base of the proboscis. Gouozoids 

 arabulatory (= Eleutheria Kr.). 



Clavatella Hincks 1 Sp. 



Fam. 8. MyriOtbeÜdae. Polypary solitary, with very numerous, 

 capitate, minute tentacula, scattered over the body. 



