170 
MOLLUSCA. 
SOLENOCONCH^. 
Dentalium gracile, sp. n., JeftVeys, Ann. N. H, (4) vi. p. 74, Mediterranean 
and Vigo Bay. 
LAMELLIBEANCHIATA. 
Eacaze-Duthiers, studying the organization of Aspergillum^ 
found by injection a free communication between the pericardial 
cavity, the so-called organ of Bojanus, and the network of veins 
in the posterior part of the visceral mass, a communication which 
has been denied lately by Langer from observations onAnodonta. 
C. R. Feb. 1870, and R. Z. 1870, p. 68. 
INGLUSA. 
PnOLADIDiE. 
Pholas, ' An account of L. Spengler’s monograph (1792) is given by Morch, 
Mai. Bl. xvii. p. 102. 
Teredo. The muscle between the rudimentary valves is proved 
to be homologous to the posterior adductor muscle of the ordi- 
nary Bivalves with two adductors, by its relation to the position 
of the intestine; it is the posterior part of this animal which 
is enormously elongated in comparison with normal Bivalves. 
Lacaze-Duthiers, C. R. Jan. 1870, p. 102. 
Teredo chlorotica, sp. n., Gould, Invert. Mass. p. 34, woodcut, Massa- 
chusetts. 
Gastrochasnidas. 
Oastroch<ma. An account of L. Spengler’s papers concerning this genus 
is given by Morch, Mai. Bl. xvii. pp. 101 and 103. 
Aspergillum javanicum. The anatomy has been studied by 
Lacaze-Duthiers, who came to the conclusion that it agrees in 
all essential points with the other Lamellibranchiate Bivalves. 
The upper [anterior] adductor muscle has disappeared; and 
in consequence the branchial ganglions touch the rectum. 
The calcareous tube is an adventitious formation, analogous to 
the calcareous deposit in the holes made by Teredo, and not 
homologous with the rudimentary valves ; the mantle does not 
adhere to the tube ; and its edges are connate for almost their 
whole length. The young are contained within the mantle, as 
in Ostrea and Teredo. C. R. Feb. 1870, pp. 268-271. 
MviDiE. 
Mya. An account of L. Spengler’s monograph of this genus is given by 
Morch, Mai. Bl. xvii. p. 106. 
Corbula mlculosa, sp. n., H. Adams, P. Z. S. 1870, p. 0, pi. 1. f. 2, Red Sea. 
