46 Rissoii)^. 



18. Stonothyra, sp. 



1 Java (?) j coll. IJaroii F. von Ri(;hth()fon. 



Not tlic species figured by Mousson. 



19. Stenothyra woodmasoniana. 



Stonothyra woodniusoniiiiiu, Q. Nav'dl, J. A. S. B. 18H0, Pi. Canning, long. 

 81, diam. {oIjc) 2 mil., and op. c, 1881, pi, VII, fig. 8. 



10 Port Canning (type) ; coll. J. Wood-Mason, Esq. 



4i. Family EISSOIDiE, Grcii/, 



Subfamily IIYDB0nTTN2r<], Troschol [emend.]. 



Genus HYDROBIA, Ilartmmm. 



Sturm, Fauna Deutichland, 1821, ttjpes II. acuta, vilrea, and minufa [sine 

 descr.'] ; /i^pe reslriclad Ilijdr. acuta, Drap., Fischer, J. de C. 1878; = 

 Faludcstrina, Orh. {pars), Voy. Amer. Mar id. WHO, p. 881, tgpeP.nigra, 

 Or Ik Sfc. ;^^Errof)ia, Stimpson, 1865, type Turho miwutus, Totten ;^Lit- 

 torlneUa, liraun, 1842, and of Thomae, Jahrh. Ver. Naturh. Nassau, II, 

 p. 125, 1845, type My dr. acuta, Drap. ; = Peringia, Palad., Ann. Set. 

 Matur. 1874, type II. ulvae, Mtg. ; sect. = Thermhydrohia, Paulucci 

 1878, type llydrobia aponensis, v. Martens. 



TLo animal of ITydrohia [as " LlUorinella'] is gcnorically 

 distinct from tliat of Peringia [hb ^* Hydrohla'], nccovding to 

 Stimpson. Gray, in Turton's Manual, 1840, proposed Turho 

 nlvae. Pennant, as type of the gcnuy, but this cannot, however, 

 be so accepted, because it was not one of Hartmann's original 

 type sjiecies. 



1. Hydrobia ulvse. 



Turbo IJlvac, Pennant, Brit. Zool. 1776; fide Jeffreys :=: Pal. muriatica. Lam. 

 and [p. 810'}^=Cycl. anatinum, Drap. ; Jide Morch, 1871=11. JcverensiSf 

 Schroter, with var. grandis,from Denmark, long, 9k mil. 



20 Shorcluuu and WcynitniUi ; coll. 0. Nevill and 'i\ F. Ncvill, Esqrs. 



