TRIBE I. AST R^ ACE A. 125 



2. Upper margin of the animal 4 or 8 lobe d. 



GENUS VI. LUCERNARIA. (Mutter.} Suctorial appendages covering 

 the extremities of the lobes. (Muller, Zool. Dan. Prod. 232.) 



IF. Some or all of the tentacles papillose or frondescently lobed ; with or without suc- 

 torial vesicles. 



GENUS VII. METRIDIUM. (Oken.) With numerous simple tenta- 

 cles like those of the Actiniae, and, besides, frondescent or papillose 

 appendages, corresponding to other tentacles, or pertaining to the 

 base of the simple ones. (Includes the Heterodactyla of Ehrenberg. 

 The genus Sarcorhinanthus of Lesson, (from <r a p?, flesh, and the genus 

 Rhinanthus, in botany,) falls in part here, or includes another genus 

 with the inner tentacles clavate and vesiculigerous, for which Ehren- 

 berg has proposed the name Europala.} 



GENUS VIII. ACTINERIA. (Blainville.} All the tentacles either 

 subdivided or more or less papillose, often very short. (Blainville, 

 Man. d'Actin. 322; includes the Metridium, Epicladia, and Mega- 

 lactis, of Ehrenberg, and probably the Thalassianthus of Leuckart.) 



The number of genera here given is less than has been received, 

 and it may be necessary to follow Ehrenberg in subdividing the last 

 two groups, according as the tentacles are furnished or not with suc- 

 torial vesicles. The presence of these vesicles characterizes Ehren- 

 berg's genera Heterodactyla and Epicladia. 



GENUS I. ACTINIA.* 



ActinidcB basi scepius affixes. ; tentaculis simplicissimis et nudis, retrac- 

 tilibus. 



Actinidse usually attached at base ; tentacles simple and naked, 

 retractile. 



The species of Actinia? are characterized with difficulty. Colour, 

 the particular mention of which constitutes half of many descriptions, 

 is generally of little importance, the same species presenting very 

 different shades. Yet the arrangement of the colours, especially if 

 in stripes, or bands, is often characteristic. It should be observed, 



* The descriptions of the species of Actinidse beyond, have been prepared for this 

 Report by Mr. Joseph Drayton, of the Expedition, by whom the drawings were made at 

 sea. They are made out from the notes of Mr. J. P. Couthouy, who had charge of the 

 department during the earlier part of the cruise, and also from his own observations. 



32 



