UKMAINS IN TUE COAL-l'OUMATlON OK NOVA SCOTIA. (Ml) 



(Ucceived Aj)!'!! 10, 188:i.) 



I have nmc'li pleasure in appcMuling tlie following note, wliioli I coiisidLT a most 

 important adilitioii to my paper, sliowing tliat two .species of Scorpions have been 

 entombed with the other tenants of the eivct trees. 



Note II. — On Additional liciaalns of Aiik-uJates obtained bij Dr. Daw.son ./Vo>rt 

 Siiji/lai'ian Slttniits in the Coal-Jicld of Nova Scotia/'^ Jhi Dr. Samuel H. Scuddkr. 



The fra,i,'ments sent to me for study, like those formerly received, consist in great 

 part of myriapodal remains, often of single segments, and generally in a more or less 

 ci'ushed and flattened condition. In tliis respect they are not ,so well preserved as 

 some of tliose previously studied, and obtained from erect trees in the same locality. 

 Although all the species formerly separated occur in this collection, very little can be 

 added to the statements then nuide. Two specimens occur of Xi/lcbin.i sigiUaria', 

 live of A', nintili.s; tlu'ee are somewhat doul)tfully referred to A', j'ractiis, eight to 

 A'. Dawsoiii, and ten to Archiulns xi/Iubinides. A single specimen oi' X. Dawsoni, 

 showing four or live continuous .';egments, seems to prove that the elevated transver.se 

 ridge on each segment in this species was cmwned by a single series of minute warts 

 or raised points, not very closely set. A few specimens of dill'erent s])ecies exhibit 

 the marks which were liirmeily interpreted i\s /'onuiiiua rcpiKjiiaforia, but are now 

 presumed to be the casts of Ijascs of sjiiiics,'' thus bringing these species into more 

 definite and ])robable relations to the carboniferous myriapods of Mazon Creek, though 

 they plainly belong to a distinct group. Whatever spines they had must have been 

 very small, slight, ajid wholly insignilicimt in eomjjari.son with those of the bristling 

 Archipohjpoda of the Morris beds. Careful search has been made for any other of those 

 special features which di.stinguish the AirJiijioJiipoda from recent Di/tlopudn, but in 

 vain, beyond the single but not uninipintaiit point that the ventral plates, in ^i)rhiu/us 

 at least, are very bioad and ])iobiilily ahiiufst e(pially extensive in lateral expansion 

 with the dor.'ial plates, a feature found nuwhere in modern Diplopoda. 



This is, peihiips, most clearly shown in two new species of AiyhiuJus, discovered 

 among these remains, and tu which are leleired a do/.en (.r more specimens. One of 

 these sj)eeies is of about the same si/.e with A. .fi/lnhiuidLfi, but has perfectly Hat 

 segments showing only a very slight and nairow transverse ridge at the anterior 

 margin, occupying not more than one-1'uurth of the segment. 1"he other is a smaller 

 species, and lias shorter and nmre simple segments, made slightly concave by the 



* l''iir (li'sci'Iplious (if tlic iTiuailis [iro , ii.iisly iliscoMTtil, sei' .Mnii. Jio.st. Soc. Nut. Jli.-it., v.il. ii., 



pp. 2;u-2;3st, ."Kji-sc.ii (i,sr;5, isrc). 



t ilcin. J5i.sl. ,Suc. Nat. Jliat., vdl. ill., pp. 1 t'-, It^ (l''-^:^;- 



■i o 2 



