424 SAMUEL H. SCUDDER ON NEW 



Family Euphobeeidae Scudder. 



AcANTiiERPESTES Meek and Worthen. 

 Acantherpestes major. 

 Acantlierpestes major Sciidd., Mem. Bost. Soc. Nat. Hist., nr, 150 (1882). 



Mr. R. D. Lacoe has sent me several new specimens of this species, wliich appears 

 to be not uncommon at Mazon Creek, but they add little or nothing to what has previ- 

 ously been published. The best specimen (No. ISOlde) exhibits about twenty-four 

 segments of the body, neither end of which appears. The spines are nowhere well pre- 

 served, but the legs are partly shown at each extremity, and seem to be unusually broad, 

 flattened, and crowded, with no sign of any median carina; although the specimen is not 

 of the largest size, the fragment measuring about 15 cm. in length, and at most 17 mm. 

 in breadth, the legs are 1.5 mm. broad in the middle. 



Another specimen of this species, fi'om Mazon Creek, sent me by Mr. W. F. E. Gur- 

 ley, consists of a fragment from the middle of the body, of twelve segments preserved 

 upon a side view, the spines of the subdorsal series showing finely, but no trace of legs. 

 The body is curled slightly backward, as is most common in the specimens so far found, 

 and the segments are 20 mm. high and in the middle 7 mm. long on an average. The 

 siiines are about 15 mm. long, the apical 4.5 mm. concerned in the furcation; the forks 

 are deeper than usual, and the boss on which they are seated is 2 mm. high. 



Finally, a smaller specimen, presumably of this species, likewise from the middle of 

 the body and about 11 cm. long, from Mazon Creek, is in the museum of Columbia Col- 

 lege, the opportunity of examining which I owe to Dr. J. S. Newberry. It is also pre- 

 served upon the side, shows no legs, and only indications of the subdorsal spines, the 

 pleurodorsal indicated by abraded bosses. It contains nothing to add to the structural 

 peculiarities of the species. It is made up of sixteen segments which are about 14 mm. 

 in height. 



Acantherpestes inequalis sp. nov. 

 PI. 33, figs. 2, 4. 



Two specimens of gigantic myriapods have been sent me, one by Mr. E. D. Lacoe, 

 the other by Mr. J. C. Carr, but now in the possession of the former, which are clearly dis- 

 tinct from anything hitherto known. Although very difterently preserved and showing 

 veiy ditlerent characters, they seem to belong together since they agree iu the one feat- 

 ure of the inequality of the tines of the forked sjiines. 



One of them (fig. 2) , received from Mr. Carr, but now numbered 1819ab, in Mr. La- 

 coe's collection, is a fi-agment of the anterior part of the body preserved to show a com- 

 pletely dorsal view. The head is transversely oval, but shows no structure; about a 

 dozen segments are preserved, showing that the body tapered forward, and that the first 

 segment was much narrower than the head, unless, as is very pi'obable, the latter is un- 

 naturally crushed; the first few segments are very short and broad, but posteriori}^ they 

 enlarge and lengthen, so as to be only about three times as broad as long, and present 

 a somewhat coarse granular structure. The armature, however, is the most interesting 



