559 
Correction to 
Papers from Dr. Th. Mortensens Pacific Expedition 
1914—16. X. Hjalmar Broch: Studies 
on Pacific Cirripeds. 
Ibla segmentata (Studer). 
Syn.: Chaetolepas segmentata Studer 1889 = Ibla pygmæa, Broch, p. 262. 
During a visit in Berlin in May this year I had the opportunity 
of examining the only two existing specimens of the enigmatic 
Chaetolepas segmentata described by Studer from the „Gazelle“- 
expedition. To my great surprise the specimens in detail corres- 
pond with the species described by me as Ibla pygmæa, in spite 
of the faet that neither the drawing nor the description given by 
Studer show any likeness with this animal. I have not dissected 
the „Gazelle“-specimens, but in external characters no difference 
whatever could be observed, and the identity is moreover strength- 
ened by the geographical dates, Studer’s specimens being also 
dredged near the Auckland Island (35° 21’ S., 175° 40’ E.); the 
depth here, 1092,5 metres, far surpasses that of the „ Endeavour“ 
locality (comp. p. 262), although the two finding places are situ- 
ated near each other. 
A study of mjerotome sections of Ibla segmentata gives as result 
that the males mentioned on pag. 264 are no males at all, the 
specimens containing no spermatozoa. The small specimens figured 
in Fig. 24 are in faet the pupa of Ibla segmentata ; the larvae thus 
remain in the mantie cavity of the mother animal till they have 
reached the pupa stage. The large eyes seem to be rather char- 
acteristic of the pupa as against other species hitherto known. 
I wish to tend my hearty thanks to the Director of the Zoo- 
logical Museum in Berlin Professor Dr. W. Kiikenthal and to his 
assistant Dr. S c h e 11 e n b e r g who helped me so kindly during my 
investigations in Berlin. 
p. t. Copenhagen, 27. V. 22. 
_ Hj. Broch. 
