130 COELENTERATA. 



Fam. 2. Corynidae. Polyps with scattered, more or less spirally disposed, 

 capitate tentacles. Coryne Gartner ; Actinogonium Allm. ; Syncoryne Ehrb. ; 

 Gfymnocoryne Hincks ; Gemmaria McCrady. 



Fam. 3. Bougainvillidae. Hypostome not abruptly differentiated (conical). 

 Tentacles filiform in a single circle round the base of the hypostome. Bougain- 

 villia Lesson; Perigonimus Sars ; Bimeria S. Wright; Dicoryne Allm. ; Stylactis 

 Allm.; Atractylis S. Wright; Diplura Green; Hydranthea Hincks; Cionistes 

 S. Wright ; Heterocordyle Allm. ; Wrightia Allm. ; Garveia S. Wright. 



Fam. 4. Eudendridae. Hypostome abruptly differentiated from the body 

 (everted). Tentacles filiform in a ^ngle row. Eudendrium Ehrb. 



Fam. 5. Pennaridae. Polyps with filiform and capitate tentacles. Pennaria 

 Goldfuss ; Halocordyle Allm. ; Stauridium Duj. ; Vorticlava Alder ; Heteroste- 

 phanus Allm. ; Acharadria S. Wright ; Acaulis Stimpson ; Cladonema Duj. 



Fam. 6. Cladocorynidae. Polyps with simple and ramified capitate tentacles. 

 Cladocoryne Rotch. 



Fam. 7. Clavatellidae. With simple capitate tentacles in a single row. 

 Clavatella Hincks. 



Fam. 8. Tubularidae. Polyp with a proximal and distal row of simple 

 filiform tentacles. Tubularia L. ; Hybocodon Ag. ; Ectopleura Ag. 



Fam. 9. Myriothelidae. Polyp solitary. Tentacles scattered, capitate. 

 Myriothela Sars. 



Section 2. Hydractininae. 



Colonial. Perisark invested by a superficial covering of naked coenosark ; 

 with spiral zooids. Very frequently found coating the gastropod shell of a 

 Hermit Crab. 



Fam. 10. Hydractinidae. With sessile gonophores. Hydradinia v. Ben. 



Fam. 11. Podocorynidae. Gonophores as free medusae. Podocoryne Sars 

 (Fig. 108) ; Corynopsis Allm. 



Section 3. Corymorphinae. 

 Polyps solitary, without perisark. 



Fam. 12. Corymorphidae. Gonophores as free medusae. Corymorplia Sars ; 

 Halatraclus Allm. ; Amalthaea 0. Schmidt. 



Fam. 13. Monocaulidae. Gonophores as fixed sporosacs. Monocaulus Allm. 



Section 4. Hydrolarinae. 



Polyps unsymrnetrical, with the tentacles, one or two in number, springing 

 from one side of the body. 



Fam. 14. Hydrolaridae. Lar Gosse. 



The Medusae of this order are arranged by Haeckel as follows : 

 ANTHOMEDUSAE. 



Craspedota without otocysts, wifii ocelli at the base of the tentacles, 

 and ititli manulrial gonads ; radial canals usually 4, rarely 6 or 8 ; 

 budded from Polyps of the Tubular iae. 



Fam. 1. Codonidae. Mouth-opening simple; gonads not radially divided; 

 4 narrow radial canals ; imbranched tentacles. The polyps of most Sarsiadae 

 belong to the genus Syncoryne, of Ectopleura to Tubularia, of Euphysidae to 

 Corymorpha, of Globiceps to Pennaria. 



