REPORT ON THE SIPHONOPHOR^E. 225 



Gonodendra. — Each cormidium is monoclinic and bears two small grape-like, shortly 

 pediculate gonodendra, a male (fig. 4, h) and a female (fig. 4, f). Their clustered 

 gonophores are small and not very numerous. The ovaria, however, are more numerous 

 and much smaller than the spermaria. The umbrella is well developed in both sexes, 

 with four radial canals and a ring-canal. The manubrium of the gynophores is colourless, 

 ovate, or subspherical, and contains only a single large ovum, surrounded by a network 

 of irregular spadicine canals (similar to those of Agalma, PI. XVIII. fig. 16). The 

 manubrium of the androphores is much larger, cylindrical or spindle-shaped, milk-white, 

 and includes an axial spadix ; it is prominent more or less from the ostium of the 

 umbrella in the ripe androphores (as in Agalma, PI. XVIII. fig. 17). 



Genus 43. Phyllophysa* L. Agassiz, 1862. 



Phyllophysa, L. Agassiz, Contrib. Nat. Hist. U. S., vol. iv. p. 369. 



Definition. — Agalmida? with a short and rigid siphosome, the trunk of which is 

 scarcely contractile. Bracts with small intervals. Cormidia loose ; palpons and 

 gonostyles on the internodes, scattered between the siphons. Tentilla with a simple 

 terminal filament. 



The genus Phyllophysa was established in 1862 by L. Agassiz for an Agalmid, of 

 which Quoy and Gaimard had figured a fragment only, under the name Stephanomia 

 foliacea (2, p. 74, pi. iii. figs. 8-12). The description and the figures, however, which 

 Quoy and Gaimard have left, are (as usual) far too incomplete and fragmentary to 

 determine with certainty the true nature of the form captured near New Guinea. I 

 retain the name of the genus, given by L. Agassiz, to designate that similar Agalmid, 

 the siphosome of which Huxley described and figured under the name Stephanomia 

 amphitrites (9, pi. vi.). It has loose cormidia, the palpons and gonojuhores being 

 attached separately to the trunk, between the siphons. It differs, therefore, essentially 

 from the similar Agalmid described under the same name by Peron and Lesueur ; this 

 has ordinate cormidia, with free internodes ; and the gonophores are attached to the 

 nodes at the base of the siphons (compare above, p. 221). Phyllophysa exhibits therefore 

 the same relation to the true Stephanomia which Agalma has to Crystallodes. To 

 avoid further confusion it seems advisable to call Huxley's form (9, pi. vi.) Phyllophysa 

 squamacea. 



Genus 44. Agalma, 2 Eschscholtz, 1825. 

 Agalma, Eschscholtz, Oken's Isis, 1825, p. 743 ; System der Acalephen, p. 150. 

 Definition. — Agalmidse with a short and rigid siphosome, the trunk of which is 

 scarcely contractile. Bracts with small intervals. Cormidia loose ; palpons and 



1 Phyllophysa = Leaf-bladder, tpi^ov, <puoa. 2 A galma = Ornament, dyahftcc. 



(zool. CHALL. EXP. — PART LXXVII. — 1888.) Hhbh 29 



