ACALEPH.'E. 



ACALEPH.E. 



30 



Example, Thaumantias cymbaloldea. (Med. cym. Slabber. ; Dianaa, 

 eymb., Lain.) 



Thaumnyitins cyinbatoidca. 



Placed by IVivm among his Ocr.anitr. 



Habitat. Coasts of Europe ; Holland. 

 Tima. 



Generic Character. Body hemispherical, depressed, furnished on its 

 circumference with a circle of tentaculifonn cirrhi, which are short 

 and numerous ; not much excavated be:ieath, and prolonged into a 

 very thick conic peduncle, which is entirely exserted, and terminated 



'I nun tint illlbrit. 



by a plicated enlargement ; buccal orifice at the centre <if four labial 

 appendages ; stomachal cavity in the enlargement of the peduncle, 

 and giving origin to four ascending canals, ami communicating with a 

 marginal canal 



Example, Tiiuii .Am /.'-//</;. 



Habitat. The A 1 



SECTION IV. 



Ditnuca (Quoy and Oaim.) 



Gatf'ric Character. Body hemispherical, furnished on its circum- 

 ference with a small number of tentaculiform cirrhi ; excavated beneath, 





Faroniit octonpma. 



tm<\ pruviilwl at its middle with a strong exserted proboscidiform 

 appendage, with four l>rachideou.-< appendages at ite extremity. 



Favonia. 



Generic Character. Body subhemispherical, with neither cirrhi nor 

 tentaculifonn marginal cilia ; rather deeply excavated beneath, with a 

 long, median, proboscidifoiin prolongation, having at its root six or 

 eight brachideous appendages, furnished with radiciform suckers. 

 Four ovaries. 



Example, Farnnia Octonema. (Orithyia Octonema, Lam.) 



Habitat. South Seas. 



Ditnttra. 



Li/innorec. 



Generic Character. Body subhemispherical, furnished on its cir- 

 cumference with very fine, short, and numerous tentacular cilia ; 

 rather deeply excavated beneath, and provided %vith a long proboscidi- 

 form prolongation, having at its base eight bifid and finely divided 

 appendages. Four ovaries, in the form of a cross. 



Example, /,//< /</< tri^li-n. (f>inn<i. trii'dra,la.m.) 



HaJjitat. South Seas. 



ti ti'ii'tli'fl. 

 n, the disk seen from above, 



SECTION V. 



/'. lagin, 



Generic Character. Body subhemispherieal, lobated, auriculated, 

 funiished on it.i circumference with a few tentaculiform cirrhi ; eight 

 inf.TM.r aperturos at the extremity of a fistulous peduncle provided 



