loS The Irish Nahtralist. May, 



6. G. M. R. LEVINSEn: Vidensk. Meddel. /. d. Naturists. Forening i. 



Kwbenhavn., 1883. 



7. A. J. Malmgren : Aimnlata Polyclueta Spitzbergiie, &c., 



Helsingfors, 1867. 



8. AV. C. M'InTOSH: Trans. Zooh Soi./\-s.., 18S7. 



9. „ Monogr. Br. Aiiiiel., pt, ii., 1900. 

 lu. M. Sars : Nyt Magazin for Naturvidensk.,\\., 1S50. 



11. W. vSTIMPSON: Smithsonian Contributions, 1854. 



12. G. Wilson: Irish Naturalist, \o\.yi\\\.,'^o. T, 1904. 



I2i. A. WiRKN : Vega Exped. Vetenskapl. Arbeiteii, Bd. ii.. 1S83. 



ExpivAXATiox OF Pirate. 



1. Two parapodia of Spinther oniscoides, showing cirri (c) X 45. 



2. ParapodiTim and cirrus from a transverse section, X 36. 



3. Points of setae, x 190. 



4. The same seta under high and low power, a x So, b x about 



300. 



5. Hook, X 190. 



6. Outline of gut in a slightly oblique transverse section, x about 



8 ; ca = caecum, d = diverticulum. 



7. Parapodium of S. viiniaceus, x 27. After v. Graff. 



8. Parapodium of S. citrinus, x 27. After v. Graff, 



9. Diagram of tr. sec. of gut of .S'. citrinus {S. oniscoides v. Graff). 



10. Hook of S. miniaceus, x 124. After v, Graff. 



11. Part of hook oi S. citrinus X 124. After v. Graff. 



12. Hook of .S". citrinus, X 124. After v. Graff. 



Marine Laborator}-, Bangor, Co. Down. 



REVIEWS. 



BRITISH TREES AND SHRUBS. 



Trees and Shrubs of the British isles, Native and Acclima- 

 tised. By C. S. Cooper, F.R.H.S., and W. Percivai, Westei.1.. 

 F.L.S. 4to. London : J. M. Dent and Co. In 16 parts, at \s. each. 



The authors state in their Foreword that the book has been written 

 "to enable the reader to identify not only the Trees and Shrubbery 

 Plants of the British Isles, but also the more common cultivated Trees 

 and Shrubs." The number now issued contains an Introduction, treat- 

 ing, in a very elementary manner, wuth the chief character of timber- 

 trees from the botanical, physiological and popular points of view. 

 Paragraphs are also found on such subjects as "The Advent of the 

 Garden City," " Insect and Fungoid Pests," &c. It is unfortunate 

 that the authors did not make this introduction more thorough and 

 comprehensive, for, in its present form, it contains little information of 



