I I ' 



From this point to 13 mm. farther the stem and appendages show an increase in size 

 and a development at the base of the more advanced ones of a microscopically small spherical 

 bud, the future gonodendron. 



From this latter point to 20 mm. farther the stem shows continual turns but keeps 

 its original shape and breadth of 2,5 mm. The siphons attain a length of 8 mm., are still without 

 stalk, but get more the characteristic shape of true siphons. The ptera diminish in size, the 

 central canal of the siphon deepens in colour owing to the increase of entodermic layers. In 

 general we find here the same slow alteration of the siphons having a swimming function into 

 those with a normal nutritive function, that we found in Cat. 8 Pterophysa grandis Fewk. 



Finally the most distal part of the stem is very much contracted and shows a series of 

 the most unexpected turns and contorsions the result being the scattered position of siphons 

 and gonodendra. 



When carefully examining the last three siphons and detaching them from the stem, we 

 found that at the base a small stalk is developed. The more proximal siphon shows a stalk 

 of very small size indeed, but the most distal third one has a peduncle attaining the leno-th 

 of 2,5 mm. 



At the same time we had to disentangle some thread-like structures to detach the siphons. 

 They bore great similarity to tentacles. In the bottle we found two detached siphons which in 

 size and shape do not differ at all from the most distal siphons of Cat. 27. And we found that 

 at the base of these siphons a tentacle with tentilla is developed (PI. XXIV, fig. 173) which 

 although the tentilla are small, bear a certain resemblance to those of Cat. 5 A. 



We do not doubt therefore that Cat. 27 is simply a young specimen of Cat. 5 A. and 

 that both belong to the new species Bathvphysa Sibogae. 



Detached appendages, parts of stem, tentacles of Bathyphysidae. 



Stat. 17. Lat. 7°28'.sS., Long. ii5°28'E. Depth 1060 M. Deep-sea trawl. Cat. 9, 106. 



formald. 4°/^. 

 Stat. 88. Lat. 0° 34.6 N., Long. iig^S.S E. Depth 1301 M. Deep-sea trawl. Cat. 16. formald. 4%. 

 Stat. 124. Lat. 2°27'N., Long. I25°35'E. Depth 1327 M. Cat. 13. On cable, formald. 4%.° 

 Stat. 126. Lat. 3° 27.1 N., Long. i25°i8'.7E. Depth 2053 M. Deep-sea trawl. On cable. Cat. 



6B., 6C., 6D., 6E., 6 P., 6 G. formald. 4%. 

 Stat. 161. Lat. i°io'.5 S., Long. 130° 9' E. On cable. Depth 1798 I\L Cat. 2 A., 2 B. formald. 4%. 

 Stat. 207. Lat. 5°7'-5S., Long. 122° 39' E. Buton-strait. Cat. i\6 K. formald. 4°/^. 

 Stat. 223. Lat. 5°44'.7S., Long. I26°27'.3E. Depth 4391 M. On cable. Cat. 12. formald. 4°/^. 



The appendages caught in six different stations belong probably to Bathyphysidae, owino- 

 to their excessive muscular development. It is, however, impossible to determine them specifically. 

 Still it seems interesting to indicate the different depths they come from (of course wherever 

 "on cable" was found on the label they may have come from any depth) and to draw attention 

 to the fact that the largest amount of detached appendages was found in the same station in 

 which also Pterophysa (Bathyphysa) Sttideri (Cat. 6) was caught. 



