ZOOLOGY OF FERNANDO NORONHA. 
529 
The right aucl left moieties of the male copulatory apparatus 
held together in front by a triangular plate. Below this plate 
terminates in a rounded apex, which extends as far as the inferior 
margins of the halves of the apparatus. Each upper augle of 
this plate produced laterally and upwards into a relatively 
slender bar, which curves round the superior portion of the 
anterior lamina of its side. Each anterior lamina simple, more 
or less spatulate, with evenly rounded external margin and 
slightly concave inferior margin. Viewed from the side, seen 
to be considerably thicker above than below. Posterior lamina 
irregularly quadrate, with even outer and inner margins which 
below slightly converge ; the inner margin distally produced 
into a conspicuous rounded, noduliform process, which projects 
slightly below 7 the level of the concave inferior margin of the 
anterior lamina, and is consequently visible when the copulatory 
apparatus in its entirety is viewed from the front. Above and 
externally, the interspace between the anterior and posterior 
lajninse is occupied by a small sclerite, with even margins and 
rounded below 7 , which, dilating above, forms the posterior margin 
of the superior aperture of the sheath, of which the walls are 
composed of the four laminae just described, and which contains 
the protrusible portion of the copulatory apparatus. This pro- 
trusible portion is articulated at its proximal end to a simple 
rod, which is itself articulated to the upper extremity of the 
anterior lamina. Protrusible portion curved almost through the 
arc of a semicircle, and composed of two segments. The distal 
segment about twice as long as the proximal, membranous and 
hollow behind, chitinous in front, with its posterior portion armed 
with a simple small process. 
A dozen specimens found under stones in the Banana planta- 
tions at the base of the Peak. 
In many points this species appears to resemble S_p. paraensis 
(Humb. & Sauss.). But the absence of all knowledge of the form 
of the copulatory apparatus of that species makes it impossible 
for me to refer these specimens to it. 
