HARD WICKE ' S S CIE NCE- G O SSI P. 



20' 



Hanley surmise that this peculiarly Irish slug will be 

 also found to be Asturian. 



Of Lii/iax Levis, Mull., and Umax tenellus, Mull., 



I have been unable to find any recorded varieties. 

 Lessona and Pollonera, in their monograph, record 

 the former from l'iedmonte and the valley of the Po, 

 in Italy, and the latter from the Piedmontese Alps, 

 and from the Val della Toce. 



The following works have been consulted in the 

 preparation of this paper : — 



Emil Adolf Rossmassler : " Iconographie der 

 Land- und Susswasser Mollusken," Dresden, 1835. 



Forbes and Hanley : " History of British Mol- 

 lusca," London, 1853. 



Alfred Moquin-Tandon : " Histoire naturelle des 

 Mollusques de France," Paris, 1855. 



Ralph Tate : " Land and Freshwater Mollusks of 

 Great Britain," London, 1866. 



Arnould Locard : " Malacologie lyonnaise," 

 Lyons, 1877; "Etudes sur les Variations malaco- 

 2ogiques," Paris, 1SS1 ; " Prodrome de Malacologie 

 francaise," Paris, 1882. 



Carl Agarth Westerlund : " Fauna Molluscorum 

 Terrestrium et Fluviatilium Svecia?," Stockholm, 

 1872. 



Dr. O. Boettger, in "Jahrb. deutsch. Mai. Gesel." 



Lessona and Pollonera : " Monografia dei Lima- 

 sidi Italiani. Memorie della Reale Accademia delle 

 Scienze di Torino," serie seconda, tomo xxxv. 



27 Corinne Road, Tnfnell Park. 



ASTRONOMY AND METEOROLOGY. 

 By John Browning, F.R.A.S. 



IT appears that there has been a decided falling- 

 off in the number and magnitude of the sun- 

 spots as compared with those observed in the previous 

 six months. In March there was a temporary in- 

 crease, and on the 8ih of May a magnificent group 

 of spots was visible in the sun's northern hemisphere. 



The solar prominences also show a considerable 

 reduction in number and size compared with those 

 seen in 1885, but the fluctuations are much fewer 

 than in the case of spots. This seems to prove that 

 there is no intimate connection between the two 

 classes of phenomena. 



Mercury will be at the least distance from the sun 

 on September 7th, at five in the morning. 



Venus will be at the least distance from the sun on 

 September iSth, at nine in the evening. 



There will be no occultations of stars as large as the 

 fourth magnitude. 



In September, Mercury will be a morning star. 

 Venus will be a morning star. Mars will be an 

 evening star. Jupiter will be too near the sun for 

 observation. 



Rising, Southing, and Setting of the Principal 

 Planets at in totals of Seven Days. 



Meteorology. — The mean reading of the barometer 

 at the Royal Observatory, Greenwich, in the week 

 ending 17th July, was 29.71 in. ; the variation being 

 from 30.00 in. to 29.25 in. The mean temperature 

 of the air, 60 3, was 3.0 below the average. Rain 

 fell on five days of the week to the aggregate amount 

 of 0.96 of an inch. During the week 28.3 hours of 

 bright sunshine were registered, against 40.4 hours at 

 Glynde Place, Lewes. 



The mean reading of the barometer at the Royal 

 Observatory, Greenwich, for the week ending 24th 

 July, was 29.63 in. The variation was from 29.90 in. 

 on Tuesday to 29.29 in. on Friday. The mean tem- 

 perature of the air was 64.9, and 1.9 above the 

 average in the corresponding weeks of the 20 years 

 ending 1868. Rain fell on three days of the week to 

 the aggregate amount of 0.58 of an inch. During 

 the week 48.2 hours of bright sunshine were registered 

 against 39.6 hours at Glynde Place, Lewes. 



At the Royal Observatory, Greenwich, in the week 

 ending 31st July, the mean reading of the barometer 

 was 29.61 in., the variation being from 29.29 in. to 

 29.94 in - The mean temperature of the air was 59.4, 

 and 3.2 below the average in the corresponding weeks 

 of the 20 years ending 1868. Rain fell on four days 

 of the week, to the aggregate amount of 0.93 of an 

 inch. The duration of registered bright sunshine in 

 the week was 22.3 hours, against 30.5 hours at 

 Glynde Place, Lewes. 



At the Royal Observatory, Greenwich, the mean 

 reading of the barometer for the week ending 7th 

 August was 29.79 in., and the variation was from 



