3/6 APPENDIX. 



Sub-class 2)- Discopkora {^'JtWy-^ihe?,^^). Only known as fossils 

 by impressions of their stranded carcasses. 



Sub-class 4. Lucernarida ("Sea-blubbers"). Also only known 

 as fossils by impressions left in fine-grained strata. 



Sub-class 5. Graptolitida: * (" Graptolites "). 

 Class II. Actinozoa, 



Order I. Zoantharia. Ex. Sea-anemones** {Actinidce), Star- 

 corals [AstrceidcB). 



Order 2. Alcyonaria. Ex. Sea-pens {Pemiatula), Organ-pipe 

 Coral {Tiibipora), Red Coral {Corallium), 



Order 3. Rugosa ("Rugose Corals"). 



II 4. Cienophora.*'^ Ex. Venus's Girdle {Cesium). 



Sub-kingdom III.— Annuloida. 



Animals in which the digestive canal is completely shut off from the 

 cavity of the body ; a distinct nervous system ; a system of branched 

 " water-vessels," which usually communicate with the exterior. Body of 

 the adult often "radiate," and never composed of a succession of definite 

 rings. 



Class I. Echinodermata. 



Order I. Crinoidea ("Sea-lilies"). Ex. Feather-star Cofua- 



tula). Stone-lily {Encrinus*). 

 Order 2. Blastoidea* (" Pentremites "). 



H 3. O'-^'^^^'^^^* ("Globe-lilies"). 



II 4, C>//^/z^r^'^£'^ (" Brittle-stars"). Ex. Sand-stars (O/Zw- 



ura). Brittle-stars ( phiocoma). 

 Order 5. Asteroidea ("Star-fishes"). Ex. Cross-fish {Uraster), 



Sun-star (Solaster). 

 Order 6. Echinoidea ("Sea-urchins"). Ex. SQ2i-e.gg?, {Echinus)^ 



Heart-urchins {Spatangus). 

 Order 'J. Holothuroidea (" Sea- cucumbers "). Ex. Trepangs 



{Holotkuria) . 

 Class II. Scolecida ** (Intestinal Worms, Wheel Animalcules, &c.) 



Sub-kingdom IV. — Annulosa. 



Animal composed of numerous definite segments placed one behind the 

 other ; nervous system forming a knotted cord placed along the lower 

 (ventral) surface of the body. 



Division A. Anarthropoda. No jointed limbs. 



Class I. Gephyrea** (" Spoon-worms"). 



Class II. Annelida (" Ringed-worms"). Ex.l^etc\).e?,** {Hirudinea), 



Earthworms** [Oligochceta), Tube-worms {Tubicola), Sea -worms 



and Sea-centipedes {Errantia). 

 Class III. Ch^tognatha ** ("Arrow- worms"). 



Division B. Arthropoda or Articulata. Limbs jointed to the body. 



Class I. Crustacea (" Crustaceans "). Ex. Barnacles and Acorn- 

 shells [Cirripedia), Water -fleas {Ostracoda), Brine - shrimps and 

 Fairy-shrimps {Fhyllopoda), Trilobites * {Trilobita) , King-crabs 

 and Eurypterids * [Merostomata), Wood-lice and Slaters {Isopoda), 

 Sand-hoppers {Avipkipoda), Lobsters, Shrimps, Hermit-crabs, and 

 Crabs {Decapoda). 



