MOLLUSC A. 
587 
4. Somicordiformes : fragum (\j.), tinedo {\j.) , donaciformh 
(Spcngl.), kc. 
5. Ilemicardiaformos : cardissa (L.)* 
G. Impressilunuliales : auricida (Forskdl). 
7. Papyracea? : hullata (\j.)jpapyracea (Chemn.), kc. 
8. Serripeditse : grcenlandtca (Chemn.), 
Gen. Adacna, with subgen. Monodacna and Didacna. 
Cardium nuttalii (Conrad) is distinct from corbis (Martyn), Conrad, Am. 
Journ. Conch, v. p. 106. — C. califorjxiense =pseudofossile (Reeve) = C. 
hlandum (Gould), and C. muticum (Reeve) (Dunker) ^papy- 
raceum (Schrenck not Chemn.), both from Japan. Lischke, Moll. Jap. 
pp. 144, 146. 
Carditwi pidchrum^ var., allied to rugatum (Gronov.), Martens in v. d, 
Decken’s Reisen in Ost-Afrika, iii. p. 66, pi. 3. fig. 2, from Zanzibar. 
Cardiwn isthmicum and arahicum, spp. nn., figured in Savigny’s Descript, 
de I’Egypte, Coquilles, pi. 9. figs. 11 and 14 ; and C. sueziense, sp. n., from 
Suez, Tssel, Malacol. mar. ross. pp. 76-77 ; the last figured on pi. .3. fig. 4. 
IS 0 CARDIID.aJ. 
Isocardia (Lam.). E. Romer distinguishes the following subgenera: — 
1. Tychocardiaj type I. cor (L.), and 
2. Meiocardia (H. & A. Adams), type I. moltkiana (Spengler). 
Five species of this genus are accurately described and well figured in 
Kiister’s continuation of the work of Martini and Chemnitz, section 67, 
pp. 6-9, pi. 1. 
Tridacnida'.. 
Tridacna anuamom. Specimens from Japan described by Lischlce, Moll. 
Jap. p. 160. 
MYTILACEA^ Cuv. (Lucinacea, Ad.). 
Lucinid^. 
Jagonia, gen. nov., R^cluz, for Lucina pecten (Lam.). Act. Soc. Linn. 
Bord. xxvii. 
Lucina scmperiana and erythraia, spp. nn., figured in the Descript, de 
I’Egypte, pi. 8. figs. 12 and 8; L. fischeriana^ sp. n., from Suez, Issel, Malac. 
mar. ross. pp. 82-84 ; the last two figured on pi. 1. figs. 9 and 8. 
Lucina spinifera (Montagu), a variety of it is Venm huschcerdi (Requien), 
indicated by Petit, Catal. Moll. Eur. p. 247. 
TJngulina ohlonga (Daiidin), found at Cadiz alive, probably accidentally 
introduced. Petit, 1. c. p. 247. 
Kelliid^e. 
Kellia miliacea, sp. n., Issel, Malacol. mar. ross. p. 87, pi. 1. fig. 11, Suez. 
Montacuta tmnidxda, sp. n., Jeffreys, Brit. Conchol. v. p. 177, pi. 100. fig. 6, 
Hebrides and Shetlands, Southern Sweden. 
GaLEOMMIDvE. 
Galeomma turtoni (Sow.). Observations on tlie living animal, by Jeffreys, 
Brit. Conchol. v. p. 176. 
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