88 THE NAUTILUS. 



LITERATURE. 



Adams. Voyage of the Samarang. 



Arnold, 1901. Sea Beach at Ebb Tide, p. 375. 



Colton, 1905. Nautilus, April, vol. xviii, p. 138. Sexual Di- 

 morphism in Strombus pugilis Linne. 



Fluck, 1905. - Nautilus, July, vol. xix, p. 32. Shell-Collecting 

 on the Mosquito Coast of Nicaragua. 



Quay and Gamard, 1834. Voyage de l'Astrolabe, vol. iii, p. 55-60. 



Rathbun, 1905. Proc. Acad. Nat. Sci., Phila., vol. lvii, part ii, 

 p. 371. Description of a New Species of Commensal Crab. 



Souleyet, 1852. Voyage de la Bonite, vol. xii, p. 164. 



A NEW CHITON FROM THE NEW ENGLAND COAST. 



BY WILLIAM HEALET DALL. 



Mr. Dwight Blaney of Boston, while dredging in twenty fathoms 

 off Ironbound Island on the Maine coast, was fortunate enough to 

 discover a species of Chiton which, after comparison with Northeast 

 American and North European species, appears to be new. 



Seven species of Chitonida? are known from the coast of New 

 England in less than 100 fathoms. All these have been known for 

 many years. One Arctic species is reported from the Gulf of St. 

 Lawrence and may reach the Maine coast. Besides these there are 

 two species known only from abyssal water in the North Atlantic, 

 not from the coast and not properly belonging to the New England 

 fauna. It is therefore a matter of more than common interest to 

 have a new species discovered, and, because the circulation of the 

 Proceedings of the Biological Society of Washington may probably 

 not reach the mass of malacologists, it was thought desirable to re- 

 print the diagnosis here and add to it a careful illustration of the 

 type. 



Tonicella Blaneyi Dall. Plate IV. Proc. Biol. Soc. Wash., 

 xviii, 1905, pp. 203-4, Sept. 2, 1905. 

 Shell of a deep rose-color, with fine white lineations and reticular 

 markings ; girdle brown, apparently naked, but exhibiting under 

 high magnification a microscopic granulation with a row of small 

 spinules at the extreme edge, as in T. marmorea ; the coloration of 



