PLATE XLVII. 



Pelonaia cormgata Forb. & Goods, (p. 146) 



FIGS. 



1-3. Test and mantle laid open, exposing (in fig. 1) diges- 

 tive and reproductive organs fully, the branchial 

 sac being removed ; (in fig. 2) the inside of the 

 branchial sac, the outer layer being laid open and 

 partly removed, with the endostyle showing clearly 

 in the centre, and the digestive and reproductive 

 organs partially ; and (in fig. 3) the external sur- 

 face of the branchial sac, the digestive and repro- 

 ductive organs partially, and part of the surface 

 of the test with fibrils : about three times natural 

 size.* br. s. branchial sac. 



4. The anterior end of fig. 2, showing apertures, 



tentacles, branchial tubercle (l>. t.) with nerve- 

 ganglion (n.g.), oral lamina (o. /.), and endostyle : 

 about six times natural size. 



5. The anterior end of fig. I or 3, showing the aper- 



tures : about three times natural size. 



6 and 7. Ovaries : about twelve times natural size. 6b is a 

 continuation afc x of 6a. 7 shows the same part as 

 6b in a more advanced stage of development. 



* Figs. 1 and 3 terminate abruptly, without showing the apertures, owing 

 to the original drawings coming to the edge of the paper on which they are 

 drawn. (All Hancock's drawings are on half sheets of note-paper.) 



