1881.] Scolopendrella and its Position in Nature. 699 
semblance to Campodea, and in this and in the presence of spines 
at the base of the legs, and in other characters, it bears a striking 
similarity to the Campodez and the Thysanura, as already indi- 
cated by Lubbock. It may be regarded as a connecting link be- 
tween the Thysanura and Myriapoda, and shows the intimate 
relation of the Myriapods and the Hexapods, perhaps not suffi- 
ciently appreciated by many zoologists.” 
It will thus be seen that eight years ago we called attention to 
the strongly marked Thysanurous features of Scolopendrella, a fact 
apparently overlooked by Mr, Ryder, who quotes at length, how- 
ever, the opinion of Menge in 1851, who, therefore, was the first to 
call attention at some length in an able paper, to the structure 
of Scolopendrella, of which Mr. Ryder gives a useful abstract. 
Up to last year Scolopendrella had been left undisturbed in its 
niche among the Myriopoda, when in 1880, in this journal,’ Mr. 
Ryder boldly suggested that it should be regarded as the type of 
a distinct order of articulates, and called attention anew to its 
close relationship to the Thysanura; and in his last paper gives 
the characters of the order, and a list of the known species, with 
descriptions of a new one, under the name Scolopendrella grate. 
He also figures a form very closely allied to, if not identical with 
S. notacantha of Europe. 
Having collected considerable material, notes and drawings for 
a monographic account of our Thysanura, and having worked out 
the external structure of Campodea and Lepisma, we have tong 
been anxious to study with care the structure of Scolopendrella. 
A species occurred at Salem, Massachusetts, which we called pro- 
visionally S. americana, deferring a description of it until we could 
get from Europe specimens of Newport's S. cmmaculata. Writing 
for several years past without success to naturalists in England, 
Belgium and Denmark, during the past spring we had the good 
fortune to receive several specimens of this species from Bohemia, 
through the kindness of Dr. Latzel, author of a work on Austrio- 
Bohemian myriopods, which we have not, however, seen. 
I afterwards, in 1874, found two specimens of my Salem form 
under stones at the mouth of a small cave (White’s cave, Jr.) near 
Mammoth cave, and the same spring Mr. Sanborn collected one 
in a cave near Dismal creek, near Mammoth cave. 
’ Scolopendrella as the type of a new order of Articulates (Symphyla), AMERICAN 
Narurauisr, May, 1880. 
