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J;OSSITERIA, A NEW SUBGENUS OF THE FAMILY 

 TROCHID.E. 



By Johx Brazier, F.L.S., C.M.Z.S. 



Dr. Paul Fischer in his Monograph, Genre Troque, in Kiener's 

 Coquilles Yivantes, Paris, 1880, p. 417, placed the Trochus nucleus, 

 Philippi, in a new subgenus under the name of Solanderia, and 

 defined its characters in the Manuel de Conchyl., p. 824. The 

 name Solanderia is already in use in another branch of Zoology, 

 given by Duchassaing and Michelotti in 1846, in the Class Coelen- 

 terata. I therefore propose to replace Dr. Fischer's Solanderia 

 by a new name, Rossite7-ia. 



RossiTERiA, Brazier, 1894. 



Umliilicus narrow, columella arcuate, obliquely plicate, termina- 

 ting in a strong anterior tooth. I'rochns nucleus, Philippi. 



GiBBULA (Rossiteria) xuclea, Philippi. 



Trochus nucleus, Philippi, Zeitschi-. f. Mai. p. 171, 1849; Conch. 

 Cab. p. 306, pi. 44, fig. 3; Fischer, Coq. Viv. p. 256, pi. 86, 

 fig. 2, 1880. 



Monilea {Solanderia) nucha, Pilsbry, in Tryon's Man. Conch. Vol. 

 xi. pp. 256-257, pL 61, figs. 31, 32, 1889. 



Hah. — Noumea Harbour, New Caledonia, from low water under 

 stones down to 8 fathoms among dead coral and stones, somewhat 

 common all round the New Caledonian Coast, Japan {Pilsbry); 

 Fiji or Yiti Islands [Captain Garrett); Bird Island and Wreck 

 Reef, Coral Sea, outside the great Australian Barrier Reef 

 {Brazier, 1855, 1856); Darnley Island, Torres Straits, sandy mud 

 and shells 30 fathoms {Brazier). 



In washing some dredgings for Bryzoa I came across one single 

 specimen of this species from sandy mud obtained during the 

 Chevert Expedition; the specimen is very much smaller than 

 those found at New Caledonia and Bird Island, and differs in 

 marking from a ^er}' dark green with maculations. 



