ZOOLOGY OF THE BERMUDAS. 123 



digestion in the Zoantheae somewhat different from what is 

 usually described as occurring in the rest of .the Actiniaria. 



None of the specimens examined possessed sexual organs. 

 There were about 24-26 pairs of mesenteries in the specimens 

 examined. 



I have identified this form with Z.flos-marinus of Duchassaing 

 and Michelotti, with the imperfect description of w r hich it 

 agrees fairly well. In many respects it comes near Z. sociatus, 

 but differs markedly from it in others; such for instance, as in 

 the nature of the ectoderm and in the form of the sphincter- 

 muscle, so that it must be regarded as distinct. From the 

 only Zoanthus hitherto described from the Bermudas, Z. 

 Dante (?) of Hertwig 1 it is readily distinguished by the ab- 

 sence of any distinct line of demarcation between the upper 

 and lower portions of the column. 



Mammillifera tuberculata (Gray) (PI. 11, figs. 5 and 6.) 



Isaurus tuberculatus J. E. Gray. 1828. 

 Zoanthus tuberculatus Duchassaing and Michelotti. 1860. 

 Antinedia tuberculata Duchassaing and Michelotti. 1866. 

 Zoanthus (MonantJius) tuberculatus Andres. 1883. 

 Antinedia Duchassaingi Andres. 1883. 



This form was first described by J. E. Gray, 2 from specimens 

 in the British Museum whose locality was unknown. He 

 adopted for the genus Savigny's name Isaurus. In 1860, 

 Duchassaing and Michelotti rediscovered it, and, though ap- 

 parently unacquainted with the earlier description of Gray, 

 applied to it the same specific name, but placed it in the genus 

 Zoanthus, on account of the absence of sandy incrustations on 

 the column walls. In their second paper these authors, placing 

 importance on the tuberculation of the column w r alls, erected 

 for its reception the genus Antinedia. Andres, in his most use- 

 ful monograph, has assumed that the form described by Gray 



1 R. Hertwig. Supplement to report on the Actiniaria of the Challenger Expe- 

 dition. 1888. 



2 J. E. Gray " Spicilegia Zoologica." London. 1828. 



