232 Localities of Scottish Coleoptera. 



central adductor muscle ; and sometimes also forming a raised broad 

 belt near the outer margin of the valve, just within the free lamel- 

 lar edge. The chalky matter is deposited in these places in a suc- 

 cession of thin plates, perhaps at the periodical interruptions to the 

 animal's growth ; and they are covered over with a hard and thicker 

 calcareous plate, more dense and crystalline also in its composition. 



Explanation of the Plate. 

 Fig. 1. The lip of the lower valve of Sphcerulites Mortonii, show- 

 ing the vein-like marks. — 2. Part of a longitudinal section of S. 

 Mortonii, showing the cancellated structure, nat. size. — 3. A longi- 

 tudinal section of Ostrea purpurea, showing the cells on the inner 

 side of the outer plates — 4. A longitudinal section of Ostrea edulis 

 showing the chalky matter ; a. on the inside ; b. on the inside of 

 the outer plates. 



VI — Localities of Scottish Coleoptera. By the Rev. William 

 Little. 

 A CONSIDERABLE number of the insects contained in the follow- 

 ing list have not hitherto been recorded as Scottish. Others of them 

 have been noticed as such in several entomological works, but with- 

 out any precise locality, or authority being given. A few of the 

 rarer species mentioned in Entomologia Edinensis, and Stephens's 

 Illustrations, for which new localities have been discovered, are 

 again inserted here. Several of the localities were furnished by en- 

 tomological friends, whose names I have attached to their respective 

 discoveries. It is proposed in some future numbers of this work to 

 give short specific descriptions of all the Coleoptera not included in 

 the Entomologia Edinensis. 



Leiochiton arcticus. Moffat Hills, Dumfries-shire, where I have 

 taken, at different times, upwards of a dozen 

 of specimens. 

 Tarus basalis. This insect appears to be widely dispersed, as 



I have taken it on many of the hills in the 

 west and south of Scotland, and have received 

 specimens from Ben-na-muich-duih, Aber- 

 deenshire. 

 Agonumemarginatum. Duddingston Loch. 



' atratum. Dalmeny Park. 



• piceum. Ditto. 



. pelidnum. Raehills, Dumfries-shire. 



