292 SCIENCE PROGRESS 



as follows : " Descriptions of New Species of Lepidoptera " 

 and " Notes on the Synonymy of the Genus Ogyris " (May 1916) ; 

 " Some new Lepidoptera from Siam and Africa" by Lord 

 Rothschild and " A new Sphingid and little-known Butterflies 

 from Africa M by Joicey (June 1916). In the April number of the 

 same periodical are to be found " On a new Species of Solpuga 

 from the Belgian Congo " and " On a new Variety of European 

 Tick (Dermacentor reticulatus var. aulicus, var. nov.) both by 

 Hirst and " Rhynchotal Notes — LIX." by Distant. Further 

 links in the chain of evidence showing that the chromosomes 

 furnish structures sufficient to serve as a morphological basis 

 for the phenomena of heredity, variation, and evolution are 

 provided in " Taxonomic Relationships shown in the Chromo- 

 somes of Tettigidse and Acrididse : V-shaped Chromosomes 

 and their Significance in Acrididae, Locustidse, and Gryllidse ; 

 Chromosones and Variation " by Robertson (Jour. Morph. 

 vol. xxvii. 1 91 6). The author finds the " number fundamental 

 and constant, not only for all the cells of an individual, but 

 likewise individuals of a species, the species of a genus, the 

 genera of a sub-family, and if they are sufficiently closely 

 related, even the sub-families of a family." Various collec- 

 tions of Crustacea are described in " Edriophthalma from 

 South America " by Walker (Ann. and Mag. Nat. Hist. April 

 1 91 6), "A new Species of the Amphipodan Genus Hyale from 

 New Zealand " by Chilton (ibid. May 1916), " A collection 

 of Freshwater Entomostraca made by Mr. G. W. Smith in 

 Ceylon in 1907 " (Proc. Zool. Soc. 1 April 191 6) by Gurney, and 

 " The Apterygota of the Seychelles " by Carpenter (Proc. 

 Roy. Irish Acad. vol. xxxiii. 191 6). 



Vertebrata. — Specimens, of Tilapia nilotica with an increased 

 number of anal spines were described by Boulenger (Proc. 

 Zool. Soc. April 191 6). The apparatus for poisoning the wound 

 inflicted by the large serrated spine at the base of the whip-like 

 tail of the Sting-Ray has been investigated by Evans in "On 

 the Poison Organ of the Sting-Ray (Trygon pastinaca)." A 

 well-marked epithelial follicular gland is present, opening to 

 the outside by small nipples. In his " Form and Growth in 

 Fishes " Hecht (Jour. Morph. vol. xxvii. 191 6) concludes 

 that weight = a x (length) 3 where a = condition of fish inde- 



1 In the case of papers in the Proceedings of the Zoological Society the date 

 given is that when the paper was read, not when it was published, 



