ZOOLOGICA^i igiTlSKATUllE. 
69 ? 
Modiola 7i}odiokt^ (lL.)s=phili^j)inarum (Hanley) (Gray), Hakpr 
date, Schrenck, 1. c. p. 498 j Bay of Yedo, Lischke, Mai. Blaft. xiv, p, 179i 
Modiolatia ^igrft (Gray) and vernicosa (Midd.), Bay de Castries, Sckrenck, 
1, 0 . pp, 496-408, — ilf. UirlatUf sp, n., Angas, Proc. Zool. Soo. 1867, p. 911, 
pi, 44 . fig, 12, Port Jackson, 
Lithodoniua ariatatua (Dillw.) = caudiger (Lam,), Algiers j the tail of tlie 
right valve lies in the prolongation of the under edge, that of the left in thp 
prolongation of the upper edge. Weinkauff, i, p. 222, 
Modiola, {Lithophagus) schmidtii (Schrenck), Sachalin. Schrenck, Molf. 
Amml. p. 600, pi. 21. figs. 4-7.— (Zithodomus) eoccavata, sp. n., Folip, 
M^l^agrinicoles, p. 26, pi. 4, figs. 3-6, on pearl-oysters Panama, 
Dreiasena polymorpha (Pall.), On its migration, see p. 603, 
Dreissma cochleata (Nyst) figured hy Malzine, Faune Malacol, Belg. pi, 3. 
figs. 4, 6. 
AvICULID^ (incl. VxJLSELLIDiE). 
Vulsella. The anatomy of this genus has been examined by 
Leon Vaillant; there are several points of similarity to Perna, 
especially in the structure of the rectum. The adductor muscle 
is apparently double ; but one portion is nothing else than the 
retractor of the foot, The foot is long and bent like an elbow 
(cQude ) , presenting a slit as if for a byssus \ but there is no 
byssus, at least in the adult animnh The gills nre pectinated as 
in Pecten. The author thinks tkat the genus ntey safely be 
retaiped in the family Malleacees/^ or Aviculidie, forming ^ 
passage from those provided with a byssus, as 4^vicula, Pmcij 
Malleus, to those without a byssus, as Crenatula. (L^Institut, 
July, 1865.) 
Amcalatareniina (Lmi.^^hirundo (Poli, but not of Linn^, who united all 
species known to him under this name)= acideata (Risso, Reeve), but dis- 
tinct ixomfolcata (Lam.) and from atlantica (Lam.), Mediterranean. Wein- 
kauff, i. pp. 230-232. 
[Perna] Melma costellata (Conrad) and anst^'alica (Reeve), Hakodate. 
Schrenck, 1 . c. pp. 493-495. 
Malleua obvolutus, sp. n., Folin, M^l^agrinicoles, p. 27, pi. 4. figs. 6-8, on 
pearl-oysters from Panama. 
Pinna, The Mediterranean species are arranged by Weinkaulf in the 
following manner : — 
1. P. pectinata {li.)=ingens (Penn, and the other British authors) 
(Donovan) =^rwwca^a (Phil.). 
P. pectinata, var. angusta—fragilia (Penn. ) = mwnca^(? (Da Costa and 
other British authors, not V)=t'udis (Poli, not L.) of most 
authors, Reeve, Conch. Icon. fig. 42, dredged at Algiers. 
2. P.pemula (Chemn.)=?W?s (Lam., Desh., Phil., Orb. Can., M^Andvew, 
not L.). 
3. P. nobilis (L.)=rotundata (QmQl.)=squa 7 no$a (Lam., Jphil,, 
