1883, ] 1 17 { Packard. 
A Revision of the Lysiopetalida, a family of Chilognath Myriopoda, with a 
notice of the genus Cambala. By A. 8. Packard, Jr. 
(Read before the American Philosophical Society, June 16, 1883.) 
In the course of some studies on the cave-fauna of the United States, it 
became necessary in treating of the cave-inhabiting myriopods to work 
carefully over their structure, and as they all, with a single exception, 
belong to the Lysiopetalida, a revision of a group which has been hitherto 
much neglected, may prove of service to zodlogists. 
My material mainly consists of specimens collected by myself for the 
Kentucky Geological Survey ; also, some collected by Mr, F. G. Sanborn 
for the same survey. I have also been indebted to Mr, E, Burgess, Prof, 
©. V. Riley and U. 8. Department of Agriculture, for a few specimens. 
Until 1840, when Brandt described the genus Lysiopetalum (and its 
synonym Spirostrephon), no genus of the family, as it is now understood, 
existed. In his Recueil, p, 42, he referred some southern Huropean spe- 
cies to his new genus Lysiopetalum, mentioning Julus fatidissimus Savi 
as the type. On p. 90 of the same work he proposed the genus Spiro- 
xtrephon for our more common American. species, the Julus lactarius de- 
scribed by Thomas Say in 1821. f 
In 1845, in his classical memoir in the Philosophical Transactions of 
London, on the Myriopoda, Mr. G. Newport proposed the sub-fumily (with 
Platops and Cambala as generic types) Lysiopetaline, with the following 
brief diagnosis ; Pedes laminis mobilibus affiat. 
In 1865, in his Myriopoda of North America, published in the Transac- 
tions of this Society, Dr. H. O. Wood, Jr., recognized the family rank of 
the group for which he proposed the name, Lystopetalide, with the fol- 
lowing diagnosis : “Sterna atrophied, not coalescent with or united by 
suture to the scuta.’’? The type and only genus mentioned is Sptrostrephon 
(SN. lactarius). 
Mr. Ryder’s paper in the Proceedings of the U. 8. National Museum, 
1880, was the first attempt to enumerate the species, and his detection and 
account of the genus Zygonopus added materially to our knowledge of 
the group. 
The synonomy of the family will be as follows ; 
Family LysroprraLipa Wood. 
Lysiopetaline Newport, Phil. Trans., xix, 278, 1845. 
Lysiopetalida Wood, Trans. Amer. Phil, Soc., xiii, 187, 1865, 
Koch, Verh. Zool.-bot. Ges, in Wien, xvii, 186% (Zool. 
Record, p. 194, 1868). 
Ryder, Proc. U. 8. Nat. Museum, fii, 524, 1881. 
Packard, Amer. Nat., xvii, 828, March, 1883. 
PROC, AMER. PHILOS. SOC. XXT. 114. W. PRINTED serTeMBER 15, 1883. 
