186 
Mr. A. G. Butler on a Collection of 
Fig. 7. A rachis-tooth. 
Fig. 8. Right side of the neck, a, respiratory orifice ; b, anus. 
Fig. 9. Nervous collar, a, cerebral ganglia; b, pedal ganglia; c, parieto- 
splanchnic ganglia ; d, azygos ganglion of parieto-splanchnic 
system. 
Fig. 10. One of the pedal ganglia, a, auditory vesicle. 
Fig. 11. Reproductive system, a, ovo-testis; b, hermaphrodite duct; 
c, pyriform caecum; d, accessory gland; e, albumen-gland; f, 
vas deferens; g, oviduct; h, penis (retracted) ; i, prostate gland ; 
k, vesicula seminalis ?; l, retractor muscle of penis; m, orifice of 
penis. 
Fig. 12. Empty egg-case from a group on the outside of the mantle. 
Fig. 13. Spermatozoa. 
Fig. 14. Calcareous granule from connective tissue. 
XXII .—On a Collection of Lepidoptera from the Island of 
Johanna. By Arthur G. Butler, F.L.S., F.Z.S., &c. 
Hitherto next to nothing has been known of the Lepido- 
pterous fauna of the island of Johanna; it is therefore with 
great pleasure that I have drawn out the following list of 
species collected there in September last by C. W. Bewsher, 
Esq. 
The collection contains twenty-four species of Butterflies 
and three of Moths ; of these twenty-seven no less than twenty 
have a strongly marked Mascarene character, whilst fourteen 
are species found also in Madagascar: only twelve of the 
species have hitherto been received from Tropical Africa. 
Rhopalocera. 
Nymphalid®. 
Danainm. 
1. Danais chrysippus , Linn. 
Papilio chrysippus, Linn. S. N. ii. p. 767 (1766). 
Three pairs of this widely distributed species. 
Satyrinje. 
2. Mycalesisfraterna , Butler. 
Mycalesis fraterna, Butler, Cat. Sat. p. 145, pi. iii. fig. 13 (1868). 
Two forms of this species occur in about equal numbers, 
the typical form having the under surface of the wings wholly 
ochraceous with the outer line of the secondaries distinctly 
angulated, the second form having the apical and costal regions 
