82 ADDITIONS TO THE TASMANIAN MARINE MOLLU81 \, 



casteaux Channel. That so conspicuous a shell should 

 have been so long overlooked is remarkable, the l-eason 

 being that search was not made into sufficiently deep 

 water. This shell has a very large fleshy girdle, which 

 shrinks on drying to a fraction of its living size. 



CALLOCHITON MAY1. Torr. 

 Several specimens of this remarkable species have been 

 taken in Port Artliur (E. Mawle), and also in 10 fath., off 

 Pilot Station, previously only known from the N.W. Coast. 



ACANTHOCIIITES VARIABILES, Ad. and Aug. 

 This N.W. species has been taken near George's Bay, 



East Coast (E. Mawle). 



CALLISTOCHITON ANTIQUUS, Reeve. 

 Numerous examples have lately been taken in Port 

 Arthur by Dr. Torr, W. L. May, and E. Mawle. 



OLIVELLA NYMPHA, Ad. and Aug. 

 A specimen was taken near George's Bay, East Coast (E. 

 Mawle). 



MACTRA MATHEWSI, Tate. 

 Was recorded by Tate and May, without locality. I 

 collected valves on Forsyth Island, Furneaux Group. 



SEMELE EXIGUA, A. Adams. 

 Somewhat doubtfully recorded from Tamar Heads by 

 Tate and May. I found it extremely abundant at the 

 settlement, Barren Island. 



NATICA SCHOUTANICA, May. 

 Since describing this species, I have taken a living 

 specimen in 50-70 fath., off Port Arthur. This shows it to 

 have a shelly operculum. 



MARGINELLA OVULUM, Sowb. 

 This species is variable in size and in the crenulation of 

 the lip, some specimens being strongly toothed, others 

 faintly, and others again perfectly smooth. They may vary 

 in length from 9 mill, to 5 mill. Pritchard and Gat 1 iff* 

 have made the var. or form tenisoni, Pritchard, a 

 synonym of M. pisum, Reeve, but I consider the shells 

 so identified to be only a form of ovulum. Last year 1 

 sent a number of M. ovulum to E. A. Smith, of the British 

 Museum, who replied, 24th June, 1912: — "We fortunately 

 .have that species (viz., ovulum), and other species de- 

 scribed, from Professor Bee's collection (acquired in 1880). 



* Pro. It S., Vict., 1900, p. 40. 



