AMERICAN JOURNAL OF SCIENCE. 



[THIRD SERIES.] 



Art. XVIIL— The aj; > Meek and Worthen, 



as evidence of the wide diversity of type in the earliest hnoion 

 Myriapods ; by Samuel H. Sc udder. 



[Read before the National Academy of Sciences, in April, 1882.] 

 In an article on the structure of Euphoberia of the Mazon 

 Creek nodules, published in this Journal a year ago, the wide 

 departure of modern myriapods from their ancient allies, in 

 , general appearance and habits, was clearly pointed 

 uuu uy uetailed comparisons between the relics preserved in 

 the Carboniferous rocks and the corresponding parts in modern 

 types. A considerable number of specimens of Archipoly- 

 poda, as the ancient forms were termed, bearing out in every 

 particular the points then brought forward, have since been 

 examined, and have been fully represented in an illustrated 

 memoir just published by the Boston Society of Natural His- 

 tory. Thanks to the local naturalists who have so well ex- 

 plored the beds of Mazon Creek, and who have furnished 

 nearly all the material for the papers mentioned, I shall now 

 attempt to show that Palaaocampa is neither the caterpillar of 

 a lepidopterous insect, nor a worm,* but a myriapod of another 

 new and strange type. Messrs. Carr and Bliss, of Morris, 111., 

 have sent me three specimens of Palaeocampa in fine condition, 

 better preserved and a little larger than the original, which has 



* Cf. Meek and Worthen, Proc. Acad. Nat. Sc. Philad., 1865, p. 52;— lb., Geol. 

 ' . v :■.<•..-..■_ . . 



v, p. 218. 



Am. Jour. Sci.— Third Series, Vol. XXIV, No. 141.— September, 1883. 



