cyrenid;e. 169 
comparatively described by Clessin, Mai. Bl. xviii. pp. 184-199. P. gassiesi- 
anum is recorded from S. Germany : id. Nacbr. malak. Gee. iii. p. 20. 
P. sp. n.^ from Lake Superior and Lake Michigan, not named but described 
by Verrill, Am. J. Sc. (3) ii. p. 449; Am. Nat. iv. p. 404. 
CaRDIIDjE. 
Cardium echinatwm (L.). On some varr. of it, see Morch, Vid. Medd. 1871, 
pp. 215 & 216, who {ibid.) admits the following varieties of C. edide (L.), oc- 
curring on the coasts of Denmark : — crassum, halticum (Beck, Reeve) = 
«7/«*<cM7n(Brug.)P, rufovariegatumj injlatum—rmiicum (Eichwald) = 
(Reeve). 
Glossid.®. 
This name is proposed for the family hitherto called Cyprinidce or Iso- 
cardiidce, the generic name Glossus (Poli) being older than Isocardia (Lam.) : 
Stoliczka, 1. c. p. 183. 
CHAMIDA5. 
Chama imbricata (Brod.), ambigua, dunkeri, scmipur\mraia^ and retroversa 
(Lischke), all from Nagasaki : Lischke,. J. M.-Conch. ii. pp. 126-131^ pi. 9. 
fig. 4, pi. k figs. 2, 3, 4, 1, and pi. 9. figs. 1-3. 
MYTILACEA. 
Lucinidas. 
Recluz (Act. Soc. L. Bord. xxvii. pp. 35-41, and written so 
long ago as 1853), referring to a paper by Deshayes in J. 
de Conch. 1851, proposes to break up Lucina-j Codakia {L, 
tigerina^ L.) and Loripes being provided with internal short 
chondropliores or nymphs, the latter with a long cylindrical foot, 
the former with a short one, &c. He aceordingly proposes a 
new genus, under the name Jagonia, distinct from the rest of 
Lucina by its external elongated nymphs, the edge of its mantle 
being crenulated by short tentacles, with the siphons in no way 
distinct from the rest of the mantle, its securiform foot, the 
strong and plicated lips of its mouth, and the gills of both sides 
being united in front and at the hinder end of the body. 
Jagonia jagon ( Adanson) = pecten (Lam.), J. reticulnta (Poli)=X. 
pecten (Philippi), and J. squamosa (Brug.)=Z. imhricatula (Adams) =X. 
pectm (Reeve) have been examined in spirit by the author ; but the follow- 
ing spp. are referred to the above new genus only from a consideration of 
the shell : — muricata (Chemn.) = sc«&ra (Lam.), cribraria (Conrad), pectinella 
2 i.n^pectinula (Adams), bella and nuttalli (Conrad) : id. 1. c. 
Lucina (Loripes) lactea (h.)—fragilis (Phil.), L. laetea (Lam.) = /rtc^ea 
(Montagu) = gervillii (Recluz), and L. desmaresti (Payr.) = Amphidesma 
lucinalis (Lam.) : id. ibid. p. 34, footnote. 
Lucina divergens (Phil., W>B0)— ^fibula (Reeve, 1850), widely distributed in 
the Indian and Pacific seas. Martens & Langkavel, Don. Bism. p. 63 ; = ramu- 
losa (Gould), also from Nagasaki, Lischke, J. M.-Conch. ii. p. 132. L. pin- 
dium (Dunker, 1860) (Gould, 1861), Nagasaki, id. ibid, 
Diplodonta orbella (Gould), Japan, very near semiaspcra (V\\i\.) = semir€ticu- 
lata (Orb., 1847) —granulosa (Dunker, 1853), W. Indies : id. ibid. pp. 133-136. 
