|g| Prof, Allnaau fm the ComtruetiQn find 



4. CoRYNjTis, M'Crady. 



Trophosome. — Polypites springing from an adherent base*j 

 tentacles capitate, scattered over the body of the polypitef. 



Gonosome. — Gonophores phanerocodonic, borne upon the 

 body of the polypite. Umbrella deep bell-shaped^ thick -walled, 

 with clusters of thread-cells imbedded in its walls, and with the 

 roof of its cavity rising in four overarched spaces between the 

 radiating canals ; manubrium massive ; radiating canals four 3 

 marginal tentacles four, club-shaped, with basal bulbs, each 

 furnished with an ocellus. 



Corynitis Agamzi, M'Crady J. 



5. Candelabrum, DeBlainville. 



Trophosome. — Polypites clavate, springing from a tubular 

 adherent hydrorhiza, which is invested by a periderm ; tentacles 

 wart-like, scattered over the body of the polypite. 



Gonosome. — Gonophores adelocodonic (?), on gonoblastidia 

 which are clustered round the base of the polypite. 



Candelabrum is De Blainville's name for the Lucernaria Phrygia 

 of Fabricius, which Agassiz has shown to be identical with the 

 Myriothela of Sars, and to which he has accovdingly restored the 

 original name given by De Blaiaville. 



Candelabrum Phrygia, Fabricius (sp.), = Lucernaria Phrygia, 

 Fabricius, 



Candelabrum arcticum, Sars {sip. ),=: Myriothela arctica, Sars. 



PennaridaB. 

 1. VoRTiCLAVA, Alder. 



Trophosome. — Polypites solitary, borne on the summit of a 

 simple hydrocaulus, which is attached by a simple conical (?) 

 hydrorhiza ; periderm a delicate transparent film investing the 

 hydrocaulus and the hydrorhiza ; tentacles in two verticils, those 

 composing the proximal verticil long and filiform, those com- 

 posing the distal verticil short and capitate. 



Gonosome unknown. 



Vorticlava humilis, Alder. 



Voriiclava Proteus, Wright. 



* The nature of this base has not been described : it is probably a 

 tubular reticulated hydrorhiza invested by a periderm. 



t The trophosome of this genus has been described and figured by 

 Agassiz under the name of Halocharis (Cont. Nat. Hist. U. S. vol. iv. 

 p. 239), but has been since {op. cit. p. 340) referred by him to the genus 

 Corynitis. 



X The Halocharis {Corynitis) spiralis of Agassiz, op. cit. p. 239, may con- 

 stitute a second species of Corynitis ; but there is no mention of its gono- 

 some, and it is not clear whether Agassiz does or does not regard it as di- 

 stinct from Corynitis Agassizi. 



