COE: TERRESTRIAL NEMERTEAN OE BERMUDA. 
539 
ered as somewhat abnormal, had only 10 distinct nerves with 
possible indications of 4 others. Muscular and epithelial layers of 
proboscis as in related forms. 
Willemoes-Suhm describes the two pouches of accessory stylets, 
and states that the shape of the basis of the central stylet is an 
indication of the sex of the individual — the male having a pear- 
shaped basis with rounded posterior end, while the corresponding 
portion of the basis in the female is abruptly truncated with “ sharp¬ 
ened angles.” The fact that the animals prove to be hermaphroditic 
is sufficient evidence that the angular form of the basis in the sup¬ 
posed female individual must have been abnormal or compressed 
out of its natural shape. 
A large number of proboscides examined showed invariably two 
pouches of accessory stylets, with from three to six or more slender 
stylets in each, the usual number being five or six. The accessory 
stylets when mature measure from 0.08 to 0.095 mm. in length. 
The head of each stylet is usually inconspicuously divided into four 
or sometimes five lobes by an equal number of very slight constric¬ 
tions (pi. 23, fig. 4). Similar lobes are figured by Dendy (’92) for 
G. austi'ciliensis. A further peculiarity of the stylet is the pres¬ 
ence of a very minute and inconspicuous triangular or wedge-shaped 
structure of a clear and highly refractive nature in the body of the 
stylet at the point of union of body and head. The acute angle of 
this wedge usually points into the head of the stylet, and thus in a 
direction reverse from that of the body of the stylet itself. This 
wedge-shaped structure could not be distinguished in all cases, 
although it was generally present in both central and lateral stylets. 
A similar structure which occurs in the stylet of G. australiensis is 
described by Dendy (’92, p. 98) as a quadrangular space “frequently 
of a black appearance, owing doubtless to the presence of air 
within it.” 
The central stylet (pi. 23, fig. 3) is perfectly similar in size, 
shape, and structure to the reserve stylets. It is of about the same 
length as its basis, or slightly longer. The basis is pear-shaped 
with rounded posterior margin, and perfectly symmetrical with 
respect to its longitudinal axis. It is about one and one half times 
as long as its greatest width. Several bases measured from 0.075 
to 0.09 mm. in length and from 0.045 to 0.06 mm. in greatest width. 
As described below, the stylet apparatus, including both the cen- 
