392 THE ZOOLOGIST. 



apparently attack all the stages of their host, e. g. JSI. albicans, which 

 is said by Miall and Hammond (' The Harlequin-fly,' p. 6, 1900) to 

 infest the larva, pupa, and imago of Chironomus. I have been unable 

 to trace any reference to a species of Mermis or Gordius having been 

 recorded from an adult Simnlium, nor can I find that any of these 

 worms have been described as being green, whitish being the usual 

 colour." — F. W. Edwards (British Museum (Nat. Hist.)). 



" The small Nematode from the body cavity of Simulium answers 

 closely to the description given by Siebold (in Stett. entom. Zeit. 

 1848, p. 299) of a species from the larva of Simulium reptans. The 

 description is very meagre, but I see no reason to think we have got 

 a different species here. If this is correct, the species would be 

 Mermis Simulice reptantis, Sieb." — H. A. Baylis (Brit. Mus.). 



NOTICES OF NEW BOOKS. 



The British Parasitic Copepoda. By Thomas Scott, LL.D., 

 F.L S., and Andrew Scott, A.L.S. 2 vols. Ray Society. 

 Dulau & Co., Ltd. 



' A Monograph of the Free and Semi-Parasitic Copepoda,' 

 by Dr. G. S. Brady, was published by the Piay Society in 1878- 

 1880, but from this work those found parasitic on fishes were 

 expressly omitted. " The present Monograph is the result of an 

 endeavour to enumerate and describe the species which Dr. 

 Brady has excluded, and may therefore be regarded as supple- 

 mentary to that author's work." Dr. Baird's work on ' The 

 Natural History of the British Entomostraca,' published by the 

 Bay Society in 1850, recorded thirty-four species of Copepoda as 

 parasitic on British fishes ; the number is now increased to one 

 hundred and thirteen. The enumeration and descriptions are 

 given in a very careful and thorough manner, while the second 

 volume is devoted to illustrations, mostly coloured, which pro- 

 vide the material for no fewer than seventy-two plates. British 

 naturalists may well welcome such a guide and addition to their 

 scanty knowledge on these obscure and little-known creatures. 



