(500 
ZOOLOaiCAL LITERATURE . 
Peetimculm. The reient Mediterranean species of this genus are arranged 
by Weinkauff (i. pp, 183-190) in the following manner : — 
1. P. yhjcimeris (h.) — pilosus (L. and most authors) Reeye. 
Mediterranean and Atlantic coasts from Senegal to Norway. 
2. P. pilosus {^Qm) =himaculatus (Poli)=s/cWa's (Reeve, fig. 41) and^nVosws 
Reeve, fig. 13. Mediterranean, Madeira, Canaries. 
3. P, insubricus (Brocchi) = yjWasctvw (Lam., Phil., Reeve, &c.), a variety 
of it, Reeve, fig. 9 b^zonalis (Lam,), another=s^67/«^MS (Gmel., Lam.), 
young &ii\XQa=nummarms (L. and other authors) and lineatus (Phil.). 
Mediterranean. 
Pectunculas cjlycimeris (L.), from Hakodate and coast of Mantchouria. 
Schrenck, 1. c. p. 581. 
Nucula. The known Mediterranean species are: — N. sulcata (Broun), 
which very easily loses its superficial sculpture, in which state it may be 
the N, decussata of Sowerby j N. nitida (Sow.) j N. nucleus (L.), a variety of it 
=iV. radiata (F. & II.).; N. (Bytmsis (Fovh.) may be a not yet full-gTown 
and somewliat deformed nucleus or nitida, nor has N. macandrei (Hanley) 
a better right to be regarded as a distinct species. Weinkauff, i. pp. 
202-207. 
Nucula expansa (Reeve) abundant on the coast of Labrador ; in Chateau 
Bay, 60 fathoms, of large size. Packard, Mem. Bost. Soc. Nat. Hist. i. p. 279. 
Nucula lyalli, sp. n., Baird, in Lord’s Naturalist in Vancouver Island, vol. 
ii. p. 369, Esquimau Harbour. 
Leda. Three species occur in the Mediterranean : — L. commutata (Phil. 
\SA^)=zminuta of Brocchi and Philippi, vol. ii., not of Muller and Fabricius 
=st?’iata of Philippi, vol. i., not of Lamarck, rather variable, the keel more 
or less distinct; L. pella (JL.)=inten'upta (J^oli) = emaryinata (Lam.); X. 
tenuis (Phil. vol. —lenticula (Moller) of Philippi, vol. ii., Lov^n, 
Forbes and Hanley, not of Munster. Weinkauff, i. pp. 207-212. 
, Leda fossa, sp. n., Baird in Lord’s Naturalist in Vancouver Island, vol. ii. 
p. 368, Esquimau Harbour, 10-16 fathoms. — L. hamata, sp. n.. Carpenter, 
Proc. Calif. Acad. Nat. Sc. 1860, p. 210, California. 
. Yoldia lanceolata (J. Sow.)=o6/o/^^a (G. B. Sow.) = arc^ic‘a (Brod. et Sow.) 
=^ceolica (Val.), Gulf of Tartary. Schrenck, 1. c. p. 512. 
Pectinid^e. 
Pecien varius (L.) fixes itself by a byssus, but is able voluntarily to detach 
itself, and to produce a new one. — P.jacobccus (L.) is without a byssus when 
adult. P. Fischer, Journ. Conch, xv. p. 107. 
Pectenpusio {Y'^)z=muUistriatus (Poli); all IMediterranoan specimens are 
regular, never distorted like the British variety, which is P. distortus (Da 
Costa) ; it is not certain whether the Linnean name jmsio belongs to this 
species. P. varius (L.) attains to a length of 90 millimetres, and there are 
in some specimens as many as 36 ribs ; the variety 1 of Jeffreys, Brit. 
Conch., is the most common form in the Mediterranean. Weinkauff, 
Conchyl. Mittelm. i. p. 246. — Pect. sentis andJP. daucus (Reeve) are probably 
identical. Gonzalez Hidalgo, Journ. Conch, xv. p. 263. 
P. philipipii (Pec\\iz)=.yibbus of the Mediterranean conch ologists ; Wein- 
kauff thinks that P. yibhus (L.) and P. turyidus (Gmel.) \j==.nucleus, Born], 
both from the West Indies, may finally prove to be only varieties of the 
