MONOGRAPH OF JAPANESE OrHIUllOlDEA, 



231 



Sei. Fr. Belg., XXXI, 1898, p. 89 ; Kœhler, Exp. Siboga, XLY, Pt. 2, 

 1905, p. 117 ; KcEHLER, Bull. Mus. d'Hist. Nai. Paris, 1905, p. 459. 



Opldothcla isidicola : Lütken, Bull. Hoc. Pioy. Copeuhague, 1872, p. 92, 

 PI. I &, II, figs. 4a.-4g ; Lyman, loc. cit., p. 231 ; Brock, Zeitsclir, wiss. 

 Zool., XLYI, 1888, p. 537; Loriol, Mem. Soc. Phys. d'Hist. Nat. Geuève, 

 XXXn, 1894, p. 52. 



OpJnothela verrilli : Duncan, Journ. Liuu. Soc. London, XIV, 1878, p. 

 477, PI. XI, fig. 33. 



OpMofJiela dance var. mvoluta : Kœhler, loc. cit., 1898, j)- 89. 

 Numerous specimens, clinging to Melitodes ; Moroiso, Misaki ; 

 5-10 fathoms- Numerous specimens; off Misaki. 



Strait of Formosa (Lütken). Korea seas (Duncan). 

 Indo-Pacific. 



There is no doubt, that 0. dance, 0. isidicola and 0. verrilli 

 are conspecific, as they are connected by an unbroken series of 

 intergrading forms between dance and isidicola on the one hand 

 and between isidicola and verrilli on the other. 



The first of the 

 two lots above men- 

 tioned are mostly of 

 the dance-type, while 

 the second is mostly 

 of the isidicola- but 

 partly of the verrilli- 

 type, both lots con- 

 taining some interme- 

 diate forms. Those of 



the dance-type are usually dark coloured, being green, blue, purple, 

 or brown, and are annulated on the arms ; those of the isidicola- 

 and verrilli-tjpe are light coloured or white, being light yellow or 



Fig. 67. Ophiothela dami'. From above. x20. 



