The measures of the superior nectophores are : 



Length Breadth 



Stat. 1 06. Cat. 91 P 6 mm 7 mm. 



Stat. 106. Cat. 91 P 4 mm 3 mm. 



Stat. 203. Cat. 126 F. ... 6 mm c,^/., mm. 



Stat. 215". Cat. 128 C. ... 5 mm 5'/.^ mm. 



The real difference which exists between Abyla trigona and Abyla 

 Haeckeli is the presence of one more facet in the superior nectophore. 

 The facet CI is divided into two parts by a new ridge. The deep 

 emargination of the facet, as H.\eckel calls it, has thus changed into an 

 actual division by the addition of a new ridge. In consequence of this the 

 aspect of the superior nectophore changes entirely. 



The odd facets are six in number. Facet A (textfig. 32), D (textfig. 34), 

 E (textfig. 33) are identical with the same facets in Abyla trigona^ so we 

 need not give any further description of them. 



c But facet CI (textfig. 36) has become a 



distinct pentagon with the ridges /, (?, 0, e'\ e" . 

 This facet is the inferior part of the facet CI in 

 Abyla trigona. The upper part facet CII (textfig. 35) 

 consist of the ridges a, ^, ^, p and is a quadrangle. 

 The paired facets change in shape. G and 

 G' (textfig. 39) consist of the ridges (of facet 

 CI), e (of facet CII), b (of facet D), / (of facets 

 F and F'). 



The jjoint of c (the junction of e" and /') 

 does not form directly the limit of the hydroecial 

 cavity. There is yet a very small ridge g to be 

 found. This is the only difference for the facets 

 H and H'. 



In addition to this w-e found that in some 

 superior nectophores the ridges were concave, and 

 the edges where they meet very acute (Cat. 12S C). 

 So we find some resemblance with Huxley's figures 

 of his Abyla trig07ia. 



This is yet more clear when we copy Huxley's 

 description of the superior nectophore (59 p. 82). 

 "The proximal nectocalyx has six faces arranged 

 "around the inferior moiety of its longitudinal axis. 

 "Of these the anterior is an oblong parallellogram 

 "(E) with its inferior angles produced and a little 

 "divergent; the posterior is triangular (CI) with its apex downwards; the 



SIBOGA-EXPEDITIE IX. 



32. -t 



Figg- 38—40. 



Abyla Haeckeli nov. spec. 



The paired facets of the 



superior nectophore. 



Fig. 38: facet F (F'), 



Fig. 39: facet G (C), 



Fig. 40: facet H (H'> 



Figg. 38—40: X 6. 



Figg. 32—37. 



Abyla Haeckeli nov. sp. 



The odd facets of the 



superior nectophore. 

 Fig. 32: facet A, 

 Fig. 33: facet E, 

 Fig. 34: facet D, 

 Fig. 35: facet CII, 

 Fig. 36: facet CI, 

 Fig. 37: Aperture of the 



hydroecial cavity B. 



Figg- 32—37: X 6- 



