320 A. EARLAND ON CYMBALOPORA BULLOIDES 



specimens, which, judging from Brady's figures, closely resembled 

 Mr. Matthews' specimens, were probably microspores. They 

 might be discharged through the " orbuline " pores at the base 

 of the balloon, or more probably by the rupture and dissolution 

 of the balloon chamber. This would not necessarily imply the 

 decease of the parent shell, which might continue its existence 

 and growth, the regularly Discorbine specimens as Discw^hhia 

 rosacea, d'Orb., the Acervuline specimens as Cymbalopora poeyi, 

 d'Orb., a form of abundant occurrence in all tropical waters, and 

 differing from C. hidloides in but little except the absence of a 

 balloon chamber. 



The question, however, is altogether unanswerable except as 

 the result of prolonged experiment with living specimens, and I 

 therefore put it forward with some diffidence, but in the hope 

 that some Australian microscopist, more favourably situated 

 than myself, may have an opportunity of studying and con- 

 firming it. 



In conclusion, I have again to express my thanks to my friend, 

 Mr. A. J. French, for the excellent drawings which he has made 

 in illustration of my paper. I also desire to acknowledge the 

 kindness of Sir John Murray, to whom I am indebted for the 

 supply of material from the Challenger station at Raine Island, 

 from which I have worked out most of my details. Sir John 

 Murray has also done me the courtesy of reading this paper in 

 manuscript. 



Bibliography. 



A. — d'Orbigny, De la Sagra. Hist. Fhisiq., etc., Cuba. Paris, 

 1839. " Foraminif^res," 98, iii., 2-5. 



B. — Carpenter, Parker, and Jones. " Introduction Foram." 

 (Ray Society). London, 1862, p. 215, xiil, 10-12. 



C. — MoEBius. " Beitrag Meeresfauna Insel Mauritius." Berhn, 

 1880, p. 98, X., 6-9. 



D. — Brady, H. R. " Report on the Foraminifera of the Chal- 

 lenger Expedition, 1884," p. 638, CII., 7-12, and Fig. 20, 

 p. 639. 



