34 THE ANTHOZOA 



modified to exhibit the relations sketched out above, and to harmonise 

 with the grouping of the other branches uf the Alcyonaria : — 



Suu-Skction a. Rachis without pinnules, autozooids sessile, disposed 

 on both sides of the racliis in single series or in indistinct rows. 



Family 1. Protocauijdak. Autozooids sessile, without calices, disposed 

 alternately on each side of the rachis in a single row. Spicules absent. 

 Genus — Protocaulon, Kolliker. Family 2. Protoptilidae. Autozooids 

 sessile, with calices, disposed alternately on each side of the rachis in 

 a single row. A single siphonozooid at the base of each autozooid. 

 Spicules present. Genera — Protoptilam, Kolliker ; Liigamorpha, Koren 

 and Daniel.ssen ; Microptiliim, KoU. ; Leptoptilum, Kull. ; Trichoptilum, 

 KoU. ; Scleroptilum, Koll. Family 3. Kophobelemnoxidae. Rachis 

 longer than peduncle, cylindrical, bearing on the pararachides retractile 

 autozooids in indistinct rows. Siphonozooids numerous. Spicules present. 

 Genera — Kophobelemnon, Absjiirnsen ; Sclerohelemnon, Kiill. ; Bathyptilmn, 

 KoU. Family 4. Umbellulidae. Rachis short, bearing autozooids at 

 its distal end only, where they are frequently grouped into an umbel. 

 Siphonozooids scattered over the pararachides. Genus — UmbeUitla, Lam. 



Sub-Section B. Rachis without pinnules. Autozooids sessile, borne 

 on the pararachides in distinct rows. 



Family 5. Anthoptilidae. The autozooids without calices. Genua 

 — Anthoptilum, Koll. Family 6. Funicdlixidae. The autozooids have 

 calices. Sub-Family — Fuxiculixinae, with prorachidial siphonozooids. 

 Genera — FanicuHna, Lam.; Halipteris, KoU. Sub-Family — Stauhy- 

 PTiLi^AE, without prorachidial siphonozooids. Genus — Stachiiptilum, KiiU. 



Sdb-Sectiox C. Rachis with pinnules formed by fused rows of 

 autozooids borne on the pararachides. 



Family 7. Virgularidae. Pinnules small. Sub-Family — Vir- 

 GULARINAE. Pinnules without a calcareous plate. Genera — J'irijuhtria, 

 Lam. ; Scytalium, Herklots ; Pavoiutria, Kull. Sub-Family — Stylatu- 

 LINAE. Pinnules with a calcareous plate. Genera — Stiilatuhi, Vcrrill ; 

 Dubenia, Kor. and Dans. ; AmHthoptilum,Ki>\\. Family 8. Pexxatulidae. 

 Pinnules large. Sub-?\\mily — Pexxatulinae. Siphonozooids on prorachis, 

 metarachis, and pararachides, but not on pinnules. Genera — J'ctuiatula, 

 Lam. ; Leioptilum, Verrill ; Ptilosarcus, Gray ; Halisccpfnm, Ilerklota. 

 Sub-Family — Pteroeididae. Siphonozooids on the pinnules. Genera — 

 Ptcroeides, Herklots ; Godefroyia, Ktill. ; SarcophyUinn, KoU. Family 9. 

 GoNDULlDAE. Peduncle absent ; colony attached by proximal end of 

 rachis. Genus — Gundul, Kor. and Dan. 



Sub-Section D. Autozooids se-ssile, disposed over the whole surface 

 of the rachis, which therefore has no pro-, nieta-, and pararachides, and 

 the symmetry of the colony is radial. 



Family 10. Veretillidae. Sub-Family — Caverxulauinae. Spicules 

 elongate. Genera — Cavcrnularia, Valenciennes; StylobeleimwH, KoU. 

 Sub-Family — Lituarinae. Spicules short. Genera — Litmria, Val. ; 

 Ftveh'Wum, Cuvier ; Policclla, Qray ; Clavclla, Gray. 



Sub-Section E. The rachis forms a broad reniform expansion bearing 

 autozooids and siphonozooids on its surface. Axis absent. 



Family 11. Rexillidae. Genus — 7?«u7/a, Lam. 



I 



