384 Trans. Acad. Sci. of St. Louis. 



operculum is as figured by Deshayes. The specimens were 

 collected off Cape Hatteras in 63 fathoms. 



Murex Bednalli Angas. 



Murex Bednalli Angas, Proc. Zool. Soc, 1880, p. 418, pi. xl, fig. 2. 



This species strongly resembles Murex triformis Reeve, 

 from the same region. Specimens before me agree quite well 

 with the description given by Angas. It may prove to be but 

 a well-developed form of this species or, perhaps, a variety. 

 Murex bipunctatus Reeve may eventually prove to be a 

 variety of triformis. 



Genus Trophon Montfort. 

 Section Trophon (sensu stricto). 

 Trophon acanthodes Watson. 



Trophon acanthodes Watson, Journ. Linn. Soc. London, XVI, p. 386; 

 Challenger Report, Gastropoda, p. 166, pi. x, fig. 6. 



I am strongly inclined to consider this species a variety of 

 Trophon vaginatus Jan. It is said to differ from that species 

 in being more tumid on the base, more constricted at the 

 anterior canal, has a straighter canal, a less contracted suture, 

 and a more depressed spire. The figure given by Watson is 

 excellent. It was collected off Patagonia in 175-245 fms., 

 blue mud. 



Trophon Baileyana Tenison-Woods. 



Trophon Baileyana Tenison-Woods, Trans. Royal Soc. Victoria, XVII, 



p. 80, fig. 1, 2. 

 I have seen specimens of Trophon Flindersi Adams & 

 Ano-as, which strongly resembled this species, although there 

 are some points in which Baileyana differs considerably, as 

 in the sculpture and form of the spire. It is an Australian 

 species. 



Section Boreotrophon Fischer. 



Trophon clathratus Linne. 



Trophon clathratus Linn., Syst. Nat., XII, p. 1223, 176. 

 Trophon declinans Watson (Journ. Linn. Soc. London, 

 XVI, p. 388; Challenger Report, Gastropoda, p. 168, pi. x* 



