234 
ARACEINIDA. 
AETHROLYCOSlDiE. 
This family suggested for the reception of a new genus and species, 
Arthrolijcosa antiqua, from the coal measures of Illinois, with the 
abdomen divided into 7 segments (approaching Lipistius desultor, 
Schiodto, in which there are 9 horny plates), and in many respects allied 
to Prololt/com, liomor. It is not, however, referred to the true spiders, 
but considered as representing a group combining features now charac- 
teristic of separate groups and embryonic states, bearing relations 
to the Phalangiidoi and scorpions in its oculiferous tubercle, and to the 
scorpions, false scorpions, and Thelyphonus in its forcipulate palpi; In 
general form, it is much like the true spiders, especially the Mygalidca. 
O. Harger, Am. J. Sci. (3) vii. pp. 219 (fig.) -223. 
PHALANGIDEA. 
Observations on the morphology and systematic position of the group 
by W. Sorensen, Nat. Tids. (3) viii. [1873] pp. 489-526. 0. Koch’s 
genera of Gonyleptides are considered to need revision, the number of 
tarsal joints, relied on by that author, being variable in the same 
species. The Opilionides and Trogulides of C. Koch are united as 
Opilionides, and again sub-divided as Opilionini genuini and Trogulini. 
Portions of Gonyleptes acanthurus, Dum., Opilio luridus, C. Koch, and 
Trogulus nepiformis, Latr., are figured, pi. xv. figs. 1-3. The following 
new genera and species are characterized (but no differential characters 
are given) : — 
Ptychosoma, p. 613. Gonyleptid : P. vitellinum, ibid.. Bona. 
Dicrcmolasma, p. 616. Trogulini: allied to Nemastoma ; for Opilio 
scaber, Ilbst., pi. xv. fig. 6, and ? Trogulus opilionoides^ L. Koch. 
Amopaum^ p. 517 ; A. spinipalpe^ p. 518, pi. xv. fig. 6, Central Italy. 
Anelasma^ p. 519; A. oblongum, ibid., pi. xv. fig. 4, Bona, lycosinum, 
p. 421, Central Italy. 
Trogulus sinuosus, p. 622, pi. xv. fig. 7, albicerus, p. 623, Central 
Italy. 
Gonyleptes terribilis, $ , p. 151, fig. 1, Peru, G. de/ensus, p. 152, fig. 4, 
Falkland Island, G. funestis, p. 153, fig. 5, G. I'eedi, p. 154, fig. 3, and 
G. docilis, p. 154, fig. 2, Chili, spp. nn., A. G. Butler, J. L. S. xii. pi. viii. 
Stylocellus, g. n. ; Cyphopthalmides [scarcely distinguishable from 
Cyphopthalmus, Joseph]. S. siunatranus, sp. n., Sumatra ; J. 0. West- 
wood, Thesaurus entomologicus oxoniensis (Oxford : 1874), p. 200, pi. 
XXX vii. fig. 7. 
A new family, Cryptostemmides, betw^een the Cyphopthalmides and 
Trogulides^ formed to receive Cryptostemma, Guerin, and Cryptocellus, g. n. ; 
body short, depressed ; abdomen almost round and smooth, composed of 4 
segments ; eyes obsolete ; mouth-parts concealed by the “ labrum ” ; palpi 
4- jointed, terminating with a small claw ; legs 8, of moderate length and 
.strength, relative length 2, 3-4, 1, those of 2nd and 4th pairs have the 
