lOI 



Stat. 50. Bay of Badjo, West-coast of Flores up to 40 M. Cat. 166 A., 166 B. formald. 4°/^. 



2 specimens. 

 Stat. 92. Lat. 3°7'N., Long. ii9°22'E. Depth 3975 M. Cat. 15 A., 15 B. formald. 4%. 2 



specimens. 

 Stat. 97. Lat. 5°48'.7 N., Long. ii9°49'.6E. Depth 564 M. Cat. i. One specimen, on cable. 

 Stat. 113. Lat. i°37'N., Long. I22°37'E. Cat. 152. formald. 4°/^. One specimen, on cable. 

 Stat. 165. Anchorage on North-east side of Daram-island (False Pisangs), East-coast of Misool. 



Depth 49 M. Cat. 148 A. ale. 9o7o- One specimen. 

 Stat. 184. Anchorage oft" Kampong Kelang, South-coast of Manipa-island. Depth 36 M. Cat. 68. 



formald. 4°/^^. One specimen. 

 Stat. 223. Lat. 5°44'.7S., Long. i26°27'.3E. Depth 4391 M. Cat. 18, 170. formald. 4°/^. 



2 specimens, on cable. 



RJiizophysa filifojnnis was represented by ten specimens, the smallest (Cat. 148 A.) 

 measuring about 8 mm., the largest (Cat. 18) showing a stem of 63 cm. length. Between these 

 two extremes we find specimens whose stem have a length of 6 cm., 9 cm., 22 cm., 45 cm. 

 All these measures are taken from the top of the pneumatophore to the base of the most distal 

 siphon, the specimen being taken out of its preserving fluid, because the stem stretches itself by 

 the weight of the siphons and other appendages. In many cases we had the greatest difficult}- 

 in disentangling the stem and it often happened that it broke off, but judging by the consecutive 

 stages of development of the gonodendra we were able in most cases to reconstruct the whole. 

 There is no doubt that the specimens attained a much greater length in life. 



We decided to make sketches of only two specimens as the others are not well enough 

 preserved. They are Cat. 166 A. (length pneumatophore to base of oldest siphon 9 cm.) and 

 Cat. J 8 (length top pneumatophore to most distal part of the stem 63 cm.). 



In Cat. 166 A. (PI. XVIII, figg. 141, 142) the length of the pneumatophore is 27, mm., its 

 greatest breadth \^l„ mm. It is oval; the hypocystic villi (Haeckel) are visible through its outer 

 wall. Pigment is also present near the porus, but has probably lost much through preservation. 

 The wall of the pneumatophore continues immediately into the wall of the stem. There the 

 buds of the siphons are to be found in successive stages of development. Some of them show 

 already another bud at their base, the future tentacle. This appendage is to be seen first at the 

 base of the sixth young siphon; its tentilla are not developed. These begin their development 

 near the base of the eighth siphon, and each succeeding siphon shows a more mature, more 

 extended tentacle with more and more numerous tentilla. These are all trifid, very youno- stages 

 we believe, but still clearly to be recognized as such. A single tentillum (PI. XVIII, fig. 142) is 

 thus composed of an odd median lobe with large cnidocysts in the centre, smaller ones near 

 the top, and of two small lateral filaments. Judging from their small size we are inclined to 

 think they are not mature. The cnidocysts in these filaments are of the same shape and size 

 as those near the top of the odd median lobe. 



The tentilla which Chun 97a calls "vogelkopfahnlich" are entirely wanting in this specimen. 

 Gegenbaur found them to be exceedingly rare as he found them only once in ten specimens. 

 Chun however finds that especially in young specimens beak-like tentilla only occur and that 

 together with the greater development of the specimen, other kinds of tentilla are formed and 

 that the alteration from one type to the other occurs on the same tentacle. In the Siboo-a material 



