84 



stem. The nectosome has a length of 2 cm., the siphosome of 7 cm. Still we cannot identify 

 this specimen with Dan.\"s 58, H.\eckei.'s 69, 88b and Bedot's 95 absolutely complete and 

 normal ones. The denomination Crystallotnia spec, seems to us sufficient at the present moment, 

 as the bracts show the regular polygonal shape. The nectosome possesses eight mature but 

 absolutely shapeless nectophores, the siphosome thirteen siphons with tentilla type IV, a great 

 many palpons and cT and 9 reproductive organs, the whole surrounded by thirteen bracts. Of 

 the true position of all these appendages nothing can be said as the stem shows too many 

 contor.sions and abnormal windings. 



Stephanomia Per. et Les. 



49. Stephanomia spec. Per. et Les. PI. X\^, figg. 113, 114. 



Stat. 208. Lat. 5°39'S., Long. 122° 12' E. On cable Cat. iis.A. One specimen, 1 15 B. (detached 

 appendages probably belonging to 115 A.), formald. 4°/^. 



Siep/iatiotnia as it is described by Peron and Lesueur 07 and by Huxley 59 is incomplete 

 as the specimens described by these authors were found without nectosome. But the siphosome 

 is well characterized by the presence of large, thick cartilaginous, foliaceous bracts. 



In only one specimen of the Siboga e.xpedition (Pl. XV, fig. 113) this peculiar shape of 

 foliaceous, and at the same time thick and tough, bracts was found again and we do not hesitate 

 therefore to call this specimen Stephanomia. But other characteristics failed; the nectosome has 

 completely dried up and bears one shapeless nectophore. The siphosome shows three well- 

 developed and some buds of siphons, the bract "a" being sketched magnified 2,8 times. The only 

 appendage to be recognized is a siphon at the distal end; tentilla, mature palpons, gonophores 

 were all wanting. Comparing our sketch of the bract (PI. XV^ fig. 114) with Huxley's 59 PI. VI, 

 fig. 6a, 6(5, we see there is considerable analogy between the two. 



Halistemma Huxl. 



50. Halistemma spec. Huxl. 59. PI. XV, fig. 115. 



Stat. 141. Lat. i°o'.4S., Long. I27°25'.3E. Cat. 153. formald. 47o- One specimen. 



Under the name Halistemma spec, we describe one specimen from the Siboga expedition 

 (PI. XV, fig. 115) which through incompleteness of the appendages cannot receive a definite 

 specific denomination. 



The nectosome has a length of 13 mm., of which 3 mm. must be reckoned to the curved 

 proximal part. The pneumatophore is oval, small, bearing some pigment at the top. A few 

 buds of nectophores are situated near the pneumatophore and one mature absolutely developed 

 one is yet situated on the stem. The gelatinous substance of the latter has undergone much 

 alteration. The nectostem itself shows distally indications of detached nectophores (not visible 

 in this sketch). 



The siphosome has a length of only 4 mm. and bears terminally a siphon of 7 mm. 

 length. This siphon bears at its base (the tentacle was probably contracted) a multitude of 



