472 Mr. E. I. Pocock on the 



shallow pools about half tide-mark at the East Rocks. These, 

 with others of the same size from various parts of the British 

 shores, were considered fine specimens by Prof. Hackel *. 

 For several years they have been extremely rare, only one or 

 two having been secured after diligent search. A series of 

 large and beautiful examples, however, somewhat suddenly 

 made their appearance this autumn on the seaweeds on the 

 rocks near the mouth of the harbour ; indeed, they occurred 

 in considerable abundance and all v/ere several times as large 

 as formerly. They were first noticed by my excellent assistant 

 Mr. Pentland Smith; but a more detailed study of them 

 has been undertaken by Mr. W. L. Calderwood, who will 

 probably investigate the life-history as well as the structui'e 

 of the species. 



LXII. — Cordr'ihutions to our Knowledge of the Myriopoda of 

 Dominica. By R. I. PocoCK, of the British Museum 



(Natural History). 



[Plate XYT.] 



Most of the specimens which form the subject-matter of the 

 present paper were collected by Mr. G. A. Kamage under the 

 superintendence of the West-Indies Exploration Committee. 

 Those specimens, however, of which the names are marked 

 with an asterisk were taken in 1883 by Mr. G. F. Angas. 



I. CHILOPODA. 



Fam. Scolopendridae. 



Scolopendra alternans (Leach). 

 Scolopmdra alternans, Leach, Trans. Linn. Soc. xi. p. 383, et auctt. 

 Four specimens. 



This species appears to be generally distributed throughout 

 the West Indies ; it occurs also in South America. The 

 British Museum possesses specimens from St. Kitts, Antigua, 

 Haiti, Colombia, and one from South Africa. 



For additional localities and a list of synonyms for this 

 species see Meinert, Proc. Amer. Phil. Soc. xxiii. p. 193. 



* Vkk * Sysl, d. Mtdusen, Vorwort,' p. xviii. 



