104 Barnacles. [ February, 
mouth parts (A, m). These consist of an upper lip to which is 
attached a so-called palpus (B,1). Next follow the mandibles 
(B, 2). Then the two pairs of maxille (B, 3 and 4). The max- 
illipeds, which are found in the higher Crustacea, are wanting. 
At the base of the first cirrus arise processes, varying in number 
in different species, which are termed filamentary appendages 
(A, f). These have been supposed to be part of the respiratory 
apparatus, but that such is their sole function is at least doubtful. 
(Fra. 5.) ANATOMY OF LEPAS FASCICULARIS. 
Between the sixth pair of cirri are found two small processes 
consisting of one or more joints, called the caudal appendages, 
and representing the abdomen of the higher Crustacea. Beneath 
these arises a long slender organ, the male intromittent organ 
(A, p). 
On opening the body, starting from the mouth, we see first a 
slender tube, the esophagus, then comes the stomach (A, 8); 
which connects without any defined constriction with the intes- 
tine (A, 7), and terminates at the vent (A, a), between the 
caudal appendages. At the anterior part of the stomach are 
seen the hepatic openings (A, 4) which connect with the liver 
