THE MOLLUSCA OF TORRES STRAITS. 157 



We also have this delicate Mangilia from Thursday Island, 

 collected by Mr. Arnold Umfreville Henn, in fine condition. 



Olivid^. 



31. Oliva (Steephona) episcopalis, Lam. 



An albino form only ; slightly deformed in the centre of the 

 last whorl. 



Station 5, Boydong Cays. 



32. Olivancillaria (Agaroistia) jstebulosa, Lam. 

 Station 13, Mer. 



MARGINELLIDiE. 



33. Marginella (Persicula) ovultjm:, Sow. 

 Station 13, Murray Island. 



YOLUTID^. 



34. Melo diadbma, Lam. 



35. VoLUTA (Aflica) Euckbri, Grosse. 



Perhaps too near V. piperita, Sow., to be more than a variety ; 

 but the red coloration is uniform in all examples we have 

 inspected. 



Station 2, Warrior Island. 



36. VoLUTA (Aulica) rtjtila, Brod. 

 Station 2, Warrior Island. 



37. YoLUTA (Aulica) Sophia, Gray. 



With V. nivosa, L., and F. Norrisi, G-ray, this constitutes a 

 peculiar group — V. Sophice being quite constant in its markings 

 of rows of transverse blackish-brown spots — extending in range 

 only from the west coast of Australia to the Torres Straits, 



Station 2, Warrior Island. 



38. VoLUTA (Soaphella) Turneri, Gray. 

 Station 5, Boydong Cays. 



MlTElD^. 



39. MiTEA episcopalis, L. 



40. MiTRA (Chrtsame) peeegra, Bve, 



12* 



