ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 315 



Lake of Zurich and elsewhere towards the end of October, and finds that 

 it is due to the extraordinary abundance of the prism-shaped winter ova 

 of Baphnia longispina. 



New Fossil Barnacles.* — Thomas H. Withers observes that little 

 has been done to British Cretaceous Cirripedes since the publication of 

 Darwin's monograph, and he describes five new species from the British 

 Museum collection. 



Annulata. 



Regeneration in Lumbricidae.t— Janina Zielinska has studied the 

 regeneration of the posterior end in species of Lumbricus, Helodrilus, 

 and Eisenia. In general, what happens in the long thin regenerating 

 bud is precisely like the process of embryonic development. There is, 

 however, a mode of regeneration by a short, thick bud, which is probably 

 divergent. 



Young forms regenerate more rapidly than mature forms. Those cut 

 far back regenerate more rapidly than those cut further forward. 



A scar is formed which leaves the anus open. It consists at first of 

 lymphocytes and subsequently of spindle-shaped cells from the longitu- 

 dinal musculature which degenerates locally. There is abundant phago- 

 cytosis. 



Cells migrate inwards from the epidermis and play an important 

 regenerative role. It remains uncertain whether the mesoderm bands 

 arise from mesoderm or from ectoderm. The reconstruction of muscu- 

 lature and blood-vessels is followed in detail. 



Earthworms of Ruwenzori.J — L. Cognetti de Martiis reports on a 

 collection of twenty species, of which fifteen are new. The region seems 

 to be exceedingly rich even at high elevations. The genera include 

 Alma, Dichogaster, Gordiodrilus, Pareudrilus, etc. 



American Polycha3tes.§— J. Percy Moore continues his laborious 

 investigation of American Polychastes. He deals with a collection from 

 Monterey Bay and San Diego, California— 64 species, 21 new ; and with 

 the ' Albatross ' || collection of Syllidas, Sphaerodoridae, Hesionidae, and 

 Phyllodocidae from off the coast of Southern California. 



Fossil Annelid Burrows.lf— F. A. Bather discusses fossil burrows 

 referable to the work of Polydora, and brings together a number of 

 instances. He also has notes on tubes referred to Tigillites, Taonurus, 

 etc. " It seems probable that a large number of forms previously placed 

 by geologists in a convenient receptacle labelled ' Fucoids ' may now be 

 safely regarded as due to burrowing Annelids." 



B. S. Lyman ** records a burrow of Scolithus linearis with orifice 



* Geol. Mag., vii. (1910) pp. 151-9 (14 figs.). 



t Jen. Zeitschr. Naturw., xliv. (1909) pp. 467-526 (5 pis. and 3 figs.). 

 % II Ruwenzori. Relazione Scientifichs, i. (1909) pp. 1-56 (4 pis.). See also 

 Zool. Zentralbl., xvii. (1910) p. 81. 



§ Proc. Acad. Nat. Sci. Philadelphia, lxi. (1909) pp. 235-95 (3 pis.). 



|| Tom. cit., pp. 321-51 (2 pis.). ^ Geol. Mag., vii. (1910) pp. 114-16. 



* Proc. Acad. Nat. Sci. Philadelphia, lxi. (1909) p. 297. 



