434 Mr. W. C. Hewitson on some new species of Butterflies. 



gelatinous thread to a minute alga ; was active and appeared to 

 enjoy itself, and was very shining. 



Fig. llj two varieties of Volvox, the merest specks; they 

 moved by an undulatory zigzag motion, opening the points, and 

 shutting them at pleasure ; the lower ones generally carried the 

 point forward. Specks as they were, I saw one burst, when 

 hundreds of young ones came out, and off they rolled as the pa- 

 rent did before them : this I have seen in two or three instances. 



The last I have to describe, fig. 12, was a jointed Alga, minute 

 indeed, transparent, generally present in abundance in summer 

 when the water is very luminous. 



All the figures are taken from specimens collected in Fowey 

 Harbour, and just outside of it. The whole of them minute — 

 some so small tbat I can adopt no sign, nor use any word to 

 tell how small. 



[We regret that our severe duty as Editors compels us to cur- 

 tail this paper by the omission of many passages which evince 

 our Friend's well-known zeal, and the delight which the study 

 of nature affords him. — Ed.] 



XXXVI. — Descriptions of some new species of Butterflies. 

 By William C. Hewitson, Esq. 



[With two Plates.] 



Fam. Nymphalid^. 

 Genus Ectima, Diurnal Lepidoptera. 

 Nymphalis, Go dart. 



Ectima lona, Hewitson MSS., Diurnal Lep. pi. 42. fig. 4. 



Upper side dark brown, tinged with purple, except at the base 

 of the posterior wings, and marked with numerous lines and spots 

 of black. 



Anterior wings with an irregular band of white formed of four 

 distinct oval spots reaching from a little beyond the middle of 

 the costal nervure to the middle of the outer margin. 



Posterior wings with two scarcely visible ocelli. 



Under side of a light yellowish brown with the same mai"king 

 as above. 



The female differs from the male in having the white band 

 much larger and not divided into distinct spots. Exp. ]i inch. 



In my own collection. From the river Amazon. 



This species, though nearly allied to E. Liria {Nymphalis Li- 

 rissa, Godart), is very easily distinguished from it by the purple 



