ANTHRACOSCORPIO. 27 



caudal segments of the opisthosoma ; also fragments of some of the anterior legs 

 and apparently the maxillary processes of those of the first pair, where the anterior 

 part of the carapace is missing. Of the fourth leg the trochanter, femur, patella, 

 and part of the tibia are well exhibited. No trace of eyes is discernible. The 

 sculpturing of the carapace, terga, and caudal segments is obscured, but the terga 

 of the opisthosoma show clearly the anterior smooth elevated area which is 

 normally overlapped in living Scorpions by the posterior border of the plate 

 in front. 



Approximate measurements in mm. — Length of abdominal terga of the opistho- 

 soma 9 - 5. first tergum 1, third T5, fifth 2; width of opisthosoma 5; length of 

 first and second caudal segments 4; femur of fourth leg 4, patella 3. 



(3) Specimen in Mr. Bgginton's Collection, showing, so far as the trunk is 

 concerned, nearly the same features as Dr. Hind's example, the abdominal terga 

 and two caudal segments of the opisthosoma being preserved. The anterior portion 

 of the carapace is too much obliterated for description, but the ocular tubercle, in 

 advance of the middle of this plate, is well shown with its two eyes. Fragments 

 of appendages are shown on each side of the anterior half of the body, the femur 

 of the left chela with an anterior granular crest, such as is present in most recent 

 Scorpions, being preserved. 



Approximate measurements in mm.- — Total length from anterior end of carapace 

 to posterior end of abdominal portion of opisthosoma 12, the carapace about 3 5, 

 the rest 8'5 ; width of opisthosoma 5 ; distance of eyes from posterior edge of 

 carapace 2; length of first caudal segment about 1, width nearly 2. 



(4) Specimen in Mr. Bgginton's Collection without tail and with the rest of the 

 opisthosoma curved upwards as in the act of stinging. The chief interest of this 

 specimen lies in the fact that the chelicerae are preserved, showing obscurely 

 the normal forcipate character of these appendages. Fragments of the appen- 

 dages are obscurely indicated. Length of carapace about 3 mm. 



(5) A very small, probably young specimen in Mr. Bgginton's Collection, 

 showing the dorsal view of carapace, of the anterior seven terga of the opisthosoma, 

 and of the base of the tail. Total length (excluding base of tail) about 5 mm. ; 

 length of seven segments of opisthosoma 3'5 mm. ; width 2 mm. 



(6) Specimen in the British Museum, No. I. 1555 (PI. I, fig. 2), from Coseley 

 (Henry Johnson Collection). This example is of peculiar interest, since it shows 

 portions of the sternal surface of the prosoma. The sternum is pentagonal, with 

 its posterior border somewhat deeply excised ; a little behind the excision lies a 

 subtriangular genital operculum, and behind this there is a small sclerite repre- 

 senting the sternal plate of the pectines. Against the sides of the sternum on 

 one side abut the coxas of the legs of the third and fourth pairs as in existing 

 Scorpions; and in front of it may be traced faint indications of the coxa3, with 

 their maxillary processes, of the first and second pairs of legs; the maxillary 



