ACTINIARIA. 187 



M.-Ed. and H. ; Phymanthus M.-Ed. and H.; Crarnbactis Haeckel ; Cryptodeit- 

 drum Klunzinger ; Adinotlirix D. and M. ; Heterodadyla Ehr. 



Fam. 2. Minyadidae. Pedal disc transformed into an apparatus for floating. 

 Tentacles in sonic as in the Corallimorphidae. Minyas Guv. ; Dadylominyas 

 And.; Acerominyas And. ; Phy Hominy as And. 



Sub-tribe 2. ACTININAE. Tentacles arranged in cycles, only a single 

 tentacle communicating with each intramesenterial chamber. 



Fam. 3. Antheomorphidae. Tentacles digitate ; pedal disc present ; accessory 

 tentacles absent ; gonads on all the mesenteries ; numerous complete mesenteries ; 

 muscular system weak ; without sphincter muscle or acontia. Antheomorplie 

 R. Hertwig, deep-sea form. 



Fam. 4. Actiniidae. Tentacles digitate, in a single corona ; pedal disc 

 present ; acontia absent, sphincter muscle endodermal, weak ; with numerous 

 mesenteries. Actinia Browne ; Anemonia Risso ; Condytactis D. and M. ; 

 Adinioides Hadd. and Shack. ; Bolocera Gosse. 



Fam. 5. Aliciidae. With large flat base. Lateral body-wall with simple 

 or compound hollow processes or vesicles, mostly in vertical rows. No cinclides. 

 Sphincter variable, diffuse, endodermal. Acontia absent. Alicia Johnson ; Cysti- 

 actis M.-Edw. ; Thaumactis Fowler ; Bunodeopsis And. ; Phyllactis M.-Ed. and H. 

 Fam. 6. Bunodidae. Tentacles digitate ; pedal disc present ; acontia absent ; 

 sphincter well developed, circumscribed, endodermal ; with numerous perfect 

 mesenteries. Tallin- Gosse ; Lciotealia R. Hertwig.; Bunoiks Gosse ; Phymactis 

 M.-Edw. and H.; AulactiniaVem:; Anthopleura Duch. ; EvactisVevr.; Tlicladis 

 Kluuzinger ; Cercactis Andres. 



Fam. 7. Paractidae. Tentacles digitate ; pedal disc present ; acontia 

 absent ; sphincter strong, mesodermal ; with numerous perfect mesenteries. 

 Paractis M.-Edw.; Dysadis M.-Edw.; Teaf till inn Hertwig : Antholoba Hertwig; 

 Ophiodiscus Hertwig; Parantlms Andres; Paractinia And.; Actinerus Verr. ; 

 Adinostola Verr. ; Pycnanthus McM. ; Cymbactis McM. ; Xtomphm Gosse. 



Fam. 8. Amphianthidae. Tentacles digitate ; pedal disc present ; acontia 

 absent ; mesodermal sphincter present ; transverse axis of body and mouth 

 elongated, so that the two gonidial grooves almost touch ; principal mesenteries 

 sterile ; secondary mesenteries incomplete. Attached to the axial skeletons of 

 Gorgonidae. Stcphanadis Hertw. ; Amphianthus Hertw. 



Fam. 9. Sagartidae. With mesodermal sphincter muscle, usually with 

 only a few complete mesenteries, with acontia. 



Sub-fam. 1. Sagartinae. With naked ectoderm, the acontia emitted 

 through the mouth and through cinclides. The mesenteries of the second 

 and subsequent cycles may, in a more irregular manner, reach the oeso- 

 phagus. Sayartia Gosse ; Cereus Oken ; Adinoldba Blainv. ; Adamsia 

 Forbes, sessile upon Gastropod shells containing a Hermit crab; Cylista 

 Gosse; Mitadis Haddon and Duerden ; Aiptasia Gosse; Gephyra V. Koch 

 (Morph. Jahrb. 4) solitary or colonial, sessile on zoophytes, to which it 

 is glued by a cuticular matter secreted by the ectoderm, with more than 

 24 tentacles. 



Sub-fam. 2. Chondractininae. With thick body-wall, upper portion 

 different in character from the lower, which is provided with a cuticle. 

 The 12 primary mesenteries alone are complete and without gonads. 

 Acontia emitted by the mouth, cinclides absent. Actinauge Verrill ; 

 Chitonanthus McM. ; Hormathia Gosse ; Chitonadis Fischer ; Chondradinia 

 Liitken ; Paraphellia Haddon. 



