584 CLASSEIX. 
anatomy of Phalangiwm Opilio has been described by G. R. TREVIRANUS 
Verm. Schr. 1. 1816, s. 20—40, and A. TuLK Ann. and Magaz. of nat 
Hist. Vol, X11. 1843, pp. 153—165, pp. 243—253, pp. 318—331, Pl. 3—5. 
Note.—Several genera have been proposed by Kocu for the arrangement 
of the numerous species of Phalangium; see Uebersicht, 2tes Heft, s. 23— 
38.—Phalangodes TELLKAMPF is distinguished by the defect of ocelli. 
OrvDER V. Pseudoscorpiones. 
Cephalothorax conjoined with abdomen. Abdomen annulate. 
Palps large, terminated by a hand didactylous (chela). 
Family XI. Pseudoscorpiones. (Characters of the order those 
of the single family). Palps longer than feet, thicker. Feet mode- 
rate, terminated by two claws. Habitus of little scorpions without 
tails. 
Chelifer Grorrr., LAtR. (Obistwm Iuuta.), species of Phalan- 
gium L. The single genus. (Mandibles didactylous. Ocelli two 
or four, distant, lateral). 
Chelifer Lracn. Cephalothorax parted in two by a transverse 
furrow. Ocellus single on each side. 
Sp. Chelifer cancroides, Phalangium cancroides L., R@SEL Ins. 111. Tab. 64 ; 
the book-scorpion ; brown red; the shear-shaped palps are twice as long as 
the body ; the body without the palp is scarcely 1” long. This little animal 
lives in dark and moist places in houses, between books, &c., and feeds on 
mites and wood-lice. 
Obistwm Leacn. Cephalothorax undivided. Ocelli on each side 
two. 
Comp. Lracu Transact. of the Linn. Soc. XI. p. 391; LEACH On the 
Characters of Scorpionidea, with descriptions of the British Species of Chelifer 
and Obisium, Zool. Miscell. ut. 1817, Pl. 48—53; Dr Tuets Lettre a M. 
AUDOUIN sur quelques Arachnides, Ann. des Sc. nat. XXVII. 1832, pp. 61— 
78, Pl. 1—3; Koou Arachnid. x. Bd. 3, 4 Heft (new genera Chthonius 
and Pelorus). 
Orver VI. Solifuge. 
Cephalothorax distinct from abdomen. Abdomen annulate. 
Palps filiform, porrect, of the length of feet. 
Family XII. Galeodea. (Characters of the order those of the 
single family). 
