OF THE SELENARIAD.^, CONESCHARELLINID.E, ETC. 419 



chambers are very small and narrow, and at first they were overlooked, but 

 a few are made out clearly. We thus get this structure in two quite 

 distinct groups. 



Heliodoma implicata, Calvet. 



Heliodoma implicata, Calvet, Bull. Mus. Hist. Nat. p. 157 (1906) ; Exped. Sc. du ' Travail- 

 ieur ' et du ' Talisman,' vol. viii. p. 396, pi. 23. figs. 7, 10 (1907). 



In the British Museum there are some specimens, 1253, to which Busk 

 had given the manuscript name Cupiilaria minima. They grow on grains 

 of sand, shell, or portion of stalk, and the single spiral form of growth can 

 be followed, though it is not so marked as figured by Calvet, and does not 

 end abruptly. The interesting point is that the auricular process is always 

 on the same side; now in the Cupularidse generally there is a co-relation 

 between the position of the polypide and of the vibraculum, so that a row 

 having the polypide turned to the right (as shown by the ca?cum being to 

 the right) will have the auricular process also on the right. In other Cupu- 

 laridse there may be one, two or more rows with all turned to one side ; when 

 a change takes place, the position of both the polypide and the vibraculum 

 alters together. 



Although in the small specimens only a single spiral is visible I should 

 hesitate to make a specific separation, though further material may make 

 this necessary. The spiral growth is most interesting and perhaps nothing 

 quite similar is known in other Bryozoa. 



hoc. Cape Verde Islands, 1900 met.; Canaries, 3700 met. (Calvet); 

 iEgean Sea, 130 fath., collected by Spratt. 



CoNESCHARELLINA CANCELLATA (Busk). (PI. 29. fig. 22.) 



Lunnlites cancellata, Busk (pars), B.M. Cat. p. 101, pi. 113. tig. 5 (non 6) (1854;; 

 Waters, " Bry. from Bairnsdale," Q. Journ. Geol. Soc. vol. xxxviii. p. 512, pi. 22. figs. 10, 11 

 (1882). 



Bipora cancellata, Whiteleggo, " Austr. Poly." p. 340 (1887) ; MacGillivray, " Tert. 

 Victoria," p. 89, pi. 12. fig. 1 (1895). 



Conescharelliiia cancellata, Waters, "Bry. N. S. Wales," p. 200, pi. 4. fig. 24; pi. 6. 

 figs. 13, 18 (1887). 



In the British Museum specimens thus named by Busk belong to three 

 or four species. (Specimens from Busk's own collection so named are 

 C. angustata, d'Orb., of which species I figure a specimen (PI. 30. fig. 18) 

 from China, sent to me thus named bj' Jullicn. The specimen, pi. 113. fig. 6 

 (as cancellata) in the British Museum Catalogue, has round avicularia as in 

 < '. plulippinensis without any notch in the outer zocecia, but the minute pore 

 by the proximal end is just visible. The cone is somewhat higher than in 

 C. philippinensis in my collection, though no doubt it is that species, as are 

 also the other two small specimens. The larger specimen on the same slide 



