456 



DR. S. F. HARMER ON THE 



1885. Kraepelin, K.— " Die Fauna dei- Hamburger Wasser- 



leitung," Abh. Naturwiss. Yer. Hamburg, ix. 

 1887, Kraepelin, K. — " Die Deutschen Siisswasser-Bryozoen," 



i. " Anatom.-Syst. Teil," Abh. Naturwiss. Ver. Hamburg, 



X. Festschrift. 

 1892. Kraepelin, K. — " Die Deutschen Siisswasser-Bryozoen," 



ii. " EntwickeUmgsgeschichtlicher Teil,'"' Abh. Naturwiss. 



Yer. Hamburg, xii. 

 1898. Lapar, F.—" Technical Mycology," vol. i. London, 



Charles GriiSn & Co., Ch. xxxiv, pp. 355-362. 

 1904. Lafar, F. — " Handbuch der Technischen Mycologie," 



4 Lief. pp. 193—. 

 1894. Levinsen, G. M. Il.~" Zoologica Danica," 9 Hefte, 



" Mosdyr." 

 1896. Wesenberg-Lund, C. — " Biologiske Studier over Fersk- 



vandsbryozoer," Yid. Meddel. naturh. Forening Kjoben- 



havn, 1896, p. 249. 

 1910. Whipple, G. C. — "The Microscopy of Drinking-water," 



2nd ed.. New York (John Wiley & Sons) and London 



(Chapman & Hall). 



EXPLANATION OF THE PLATES. 



Plate LXII. 



Showing hibeniacula of Faludicella artioulata from the pipes of an English 



waterworks-system. 

 The figures were drawn with a Zeiss A objective, and were then reduced two and a 



half diameters. The scale represents hundredths of a millimetre. 



Zooecium bearing a hibernaculuni of the t.ype described by Dumortier and 

 Van Beneden. (Only two hibeniacula of this type were found in the 

 whole of the material examined.) 

 A zouecium, accidentally folded, which has developed two hibernacula, 

 while it bears two other hibernacula (bases shown) in the place of the 

 ordinary lateral buds. The preceding zooecium also bears two lateral 

 hibernacula. 

 Zooecium bearing three hibernacula. The distal one is small, and is still 

 enveloped distally by the remains of the zooecium in which it has been 

 formed. 

 The smallest hibernaculuni found. It shows distally the remains of the 

 zooecium m which it was formed. The elongated polypide-bud is seen in 

 its interior. 

 Zooecium with three hibernacula, each of which shows a polypide-bud. 

 Basal view of a zooecium which shows two split hibernaculum-valves in its 

 ectocyst. 

 Fig. 7. A similar zooecium, in basal view, with a terminal and a lateral hiber- 

 naculuni. The latter is developed nearer the proximal end of the 

 zooecium than is usually the case. 

 Fig. 8. Side view of a similar zooecium, showing the septa from which lateral 

 zooecia have broken off. A fully-formed hibernaculuni is present distally. 

 Fig. 9. A similar zooecium, bearing a terminal hibernaculum, which is still enclosed, 



distallj% in the remains of the zooecium inside which it has been formed. 

 Fig. 10. A series of three zooecia, with the proximal end of a fourth zooecium. 

 The proximal zocecium has developed a hibernaculum which has passed 

 partly through the terminal septum. The third zooecium bears a terminal 

 hibernaculum, the proximal end of which partly traverses the corre- 

 sponding septum. 



