File:Cavefaunaofnorth00pack 0183.jpg

English: Plate VIII.

Fig. 1. Scoterpes copei (Pack.), enlarged. — 1a, transverse section of the body, showing the origin of the legs beneath, and, above, the position of the setiferous tubercles ; 1b, front view of the head, male ; 1c, antenna ; 1d, the same still more magnified ; 1e, terminal joint of the same, showing the position of the setae as seen in outline, the nerve cells, and the three tactile or olfactory (?) rods (o. r.) at the end ; sd, an abnormally enlarged seta; 1/, under lip, or deutomala ; hyp., "hypostoma; " stip,i., internal stipes; stip,e., external stipes ; the former bearing the labiella, lab., and malulella, the latter (external stipes) bearing the external (mal. e.) and internal malella (mal.i.); lg, end of the under lip highly magnified; lh, another view of the labiella and stipes of one side ; 1i, genital of male, with the rudimentary eighth pair of legs (p), between which is the genital armature (1k), more highly magnified at 1l, having on each side a rudimentary lamina exterior (l.e.), a lamina interior (l.i.), and between them a stout spine, ending in a tuft of slender, stiff spinules; 1j, one of the two-jointed rudimentary feet, ending in a single claw ; 1m, two of the lowermost setae on the segment just behind the genital armature.

Figs. 1 and 1a were drawn by J. H. Emerton ; all the others by the author.