528 
MR. H. N. RIDLEY ON THE 
Diplopoda. 
Paradesmhs gracilis (C. Koch). 
Two female specimens. 
For the synonymy and an excellent description of this species, 
see Dr. Bobert Latzel’s ‘ Die Myriopoden der ost.-ungar. 
Monarchie,’ ii. p. 1G2. 
This very wide-spread form occurs in the East and West Indies 
and Brazil. 
It has been introduced, in connection with tropical plants, 
into Europe ; and I have examined many specimens of all ages, 
which were captured in the conservatory of Mr. Alfred 0. 
Walker at Chester, andin the orchid-houses of Mr. Herbert Druce 
at St. John’s Wood. 
[It was very common in the garden. — H. N. K.~\ 
SpIrobolus (s. s.) noronhensis, n. sp. 
Length about 30 millim. Number of somites 37. 
Colour deep slate-grey or almost black ; anterior half of each 
somite (the first and last excepted) adorned above and below on 
each side with a single reddish spot. Legs and labrum reddish. 
Distal portion of the head-plate furnished with a faint median 
longitudinal impression, upon each side of which, near the 
margin of the labrum, are two setiferous punctures, one near the 
middle line, the other near the external portion of the labral 
excavation. Distal segments of antennae pilose. 
First dorsal plate smooth, without striae ; laterally, where the 
anterior and posterior margins pass into one another, evenly 
rounded ; furnished with a fine sulcus which runs from near the 
ocular region of the head-plate, close to the antero-inferior 
margin, and terminates at the postero-inferior margin. 
Foramina repugnatoria situated, somewhat dorsally, in the 
posterior portion of the somites. Posterior portion of each 
somite smooth above ; anterior portion marked with transverse 
striai ; inferior and lateral portions marked with numerous longi- 
tudinal striae. Somites not furnished with the ‘ scobina .’ 
Posterior somite smooth ; produced ' behind into a blunt 
rounded process, which extends slightly beyond the margins of 
the anal valves. Anal valves with margins not compressed. 
Margin of subanal plate rounded. 
