200 SUMMARY OF OUREENT RESEARCHES RELATING TO 



requires confirmation. It has no repulsive glands, sueh as the majority 

 of the Millipedes possess. The spines may take their place, but it 

 should also be noticed that the animal is very small ami shy, and that 

 its coloration is protective. The mid-gut was Bometimes almost choked 

 with Gregarines. Pairing has not been seen. Males arc very scarce : 

 the author found none among 2000 specimens. Perhaps parthenogenesis 

 occurs. Attention must be directed to the beautiful drawings of the 

 adults. 



British Carboniferous Myriopods.* — W. Baldwin describes some 

 fossil Myriopods from the middle coal-measures of Rochdale, namely 

 Acantherpestes giganteus sp. n., an enormous specimen of about 195 mm., 

 Euphoberia armigera Meek and Worthen, E. robusta sp. n., another 

 larger form of about 68 mm. in length, E. ivoodwardi sp. n., and 

 Xylobius platti (H. Woodward). 



5- Arachnida. 



Circulatory System of Lycosa carolinensis.f — A. Petrunkevitch 

 points out that most of the text-book descriptions of the heart of spiders 

 are erroneous. He corroborates the results of Causard, and gives a fine 

 figure from an injected specimen. The heart has three pairs of ostia, 

 not four (except in Theraphosidae). The arterial system is described. 

 As the blood that enters by the second pair of ostia comes directly from 

 the body-cavity, it is probably venous. It is likely therefore that the 

 heart contains mixed blood. 



Mites and Tumours 4 — Enzio Renter criticises the evidence brought 

 forward in support of the theory that mites (Tarsonemus in particular) 

 may have causally to do with tumours in man and mammals. As an 

 expert acarologist he shows how readily accidental association might 

 come about, and he does not regard the evidence as at all convincing. 



Hydrachnids of East African Lakes.§ — Charles D. Soar describes 

 three new species, Neumania papillosa, Mideopsis minuta, Hygrobates 

 edentipalpis from Lake Tanganyika, and Unionicula cunningtoni sp. n. 

 from Lake Nyassa. He also gives a list of the 18 Hydrachnids as yet 

 recorded from East African Lakes. 



Pycnogonids of Clyde Area.|| — Richard Elmhirst records Pycno- 

 gonum littorale, Endeis (JPhoxichilus) spinosus, Phozichilidiiimfemoratiim, 

 Anaphia {Anoplodactylus) petiolata, A. pyr/msea, Pallene brevirostris, P. 

 producta, Nymphon rubrum, N. gracile, Ammothea laevis, and A. echinata 

 from the Clyde area. 



Pentastomum of Python. if — E. Bugnion describes three female 

 specimens of Porocephalus moniliforme Dies, from the lungs of a python 

 in Ceylon. The largest was 6 J cm. in length ; the head end was very 



* Geol. Mag., viii. (1911) pp. 74-80 (2 pis.). 



t Zool. Jahrb., xxxi. (1910)[pp. 161-8 (1 pi.). 



% Centralbl. Bakt. Parasitenk., lvi. (1910) pp. 339-44 (2 figs.). 



§ Journ. Quekett Micr. Club, 1910, pp. 109-14 (1 pi.). 



|| Trans. Nat. Hist. Soc, Glasgow, viii., pt. 2 (published 1910) pp. 146-9. 



^T Bull. Soc. Vaud. Sci. Nat., xlvi. (1910) pp. 467-72 (2 figs.). 



