' 48 Moll. 
MOLLUSCA. 
Nomenclature. 
The evils arising from premature publishing of MS. names, and of 
fine drawn distinctions, especially in palaeontology, are forcibly illustrated 
by Williams. 
Varietal nomenclature discussed, Woodward; Roberts (1). 
Schroder complains that Bourguignat has published species under 
his name without his consent. 
GEOGRAPHICAL DISTRIBUTION. 
Land and Fresh-water Mollusoa. 
I. — PALiEARCTIC ZONE. 
Westerlund continues his work, treating of the families Testacellidce , 
Glandinidce, Vitrinidce, and Leucochroidce ( 1 ) ; Ampullar idee, Paludinidce, 
llydrobiidce , Melanidce , Valvatidce and Neritidce , id. (2) ; Olausilia , 
etc., id. (3). 
North Temperate Region. Critical remarks on Jordan [Zool. Rec., 
xxi, Moll. p. 7] ; Simrotii (1), p. 32. 
1. Septentrional Region . 
Norway . 
Arctic Region. 50 species (3 new) enumerated, with notes and locali- 
ties ; Esmarck & Hoyer. See also Esmarck. 
British Isles. 
Origin of Molluscan fauna treated by Cockerell (8). Kobelt (3) 
disagrees with the classification of the Mollusca according to their origin 
here adopted. 
Britain. List of 11 slugs with numerous vars., W illiams (2). Criticisms 
on and replies; Cockerell (8), Williams (3), & Tomlin (3). 
Britain. Range of Pupa ringens\ Taylor (3). 
Gairloch. List given by McMurtrie. 
Tarbert , Loch Fyne. 50 species and varieties collected by Scott. 
Isle of Man. 2 slugs ; Moore, J. 
Yorkshire. Account of species of Planorbis continued by Nelson & 
Taylor. Arion subfuscus , Helix hispida ; Roberts (2). Paludina con - 
tecta , Gain. Helix lactea, Taylor (2). 
Teesdale. 24 species added to Ashford’s list; Hudson (1). 
Middlesborough. 2 slugs ; id. (3). 
Clapham , Yorks. 42 species recorded ; Richardson. 
Wakefield. 1 slug ; Roberts (5). 
Pontefract. Additional species ; id. (3). 
Llandudno. 7 species added to Roebuck’s list ; Tomlin. 
Clonmel. Few species ; Cockerell (11). 
Louth , Lincolnshire. Cockerell (17). 
Leicester. Unio tumulus, var . ponderosa, Pascal; Quilter. 
