746 General Notes. 
have a well-developed ectoderm, the centre being occupied by a 
compact and intricate network of fine filaments, the meshes of which 
were occupied by cells of varied size. Similar structures, it may 
be noted, occur in several American sponges. 
Ca:LENTERATA.—G. H. Fowler describes (Proc. Zool. Soc., 
1888), a new Pennatula (P. bellissima) from the Bahamas. In its 
systematic position it stands nearest P. naresit. 
Prof. A. M. Marshall monographs the Pennatulids collected by 
the “ Porcupine” in the Trans Roy. Soc., Edin., xxxiii. Sixteen 
species are enumerated. ` 
Motuuscs.—R. S. Call describes as new (Proc. Nat. Mus., 1887) 
Unio ozarkensis and U. breviculus from Missouri. 
calcium phosphate could be detected. aa 
esearches into the nature of the secretion of the salivary ey 
of Sepia officinalis and Patella vulgata, recently carried out by an 
A. B. Griffiths, prove that these organs have the same physio ea 
function as the salivary glands of the Vertebrata. The “sa r 
has two pairs of these glands, the secretion of the anterior smaller 
pair passing directly into the buccal cavity, while that of pers 
terior larger pair is poured into the esophagus. The two sa way 
E of Patella are situated in front of the pharynx and give 
our ducts, 
CRUSTACEA.—Richard Rathbun (Proc. Nat. Mus., 1887) be 
to our knowledge of American parasitic Copepoda by deseri i 
several new species belonging to the genera Trebius, Poe 
and Lernthropus, from the collection of the U. S. ish 
mission. = 
_ According to Mr. A. B. Griffiths, the secretion of the pie 
liver of Carcinas mænas, when freshly killed, gives an acid mo a 
and its functions are more like those of the pancreas of the sie? 
brata than like those of a true liver. The organ consists Of © 
