m TERRESTRIAL CARBONIFEROUS ARACHNIDA. 



to be distinctly shorter than the following two. These differences, however, are 

 very likely sexual, the specimen under notice being perhaps the male and the type 

 the female of the same species. The anterior sternal plates of the opisthosoma 

 are difficult to decipher. The suggested restoration in the annexed figure may 

 possibly, however, help their correct interpretation when other material is available. 

 Measurements in mm. — Total length 22 ; length and width of carapace about 8 ; 

 length of opisthosoma 18-5, width doubtful; length of trochanter and femur of first 

 and fourth legs about 7. 



(2) Specimen in Dr. Hind's Collection showing the dorsal surface and obscure 

 details of the ventral sclerites, with the trochanters and femora of the four legs of 

 the left side. The greatest width of the opisthosoma appears to be across its 

 third segment, not across the fourth as in the type ; this region is thus narrower 

 behind ; the first tergal plate of the opisthosoma is approximately only as long as 

 the second and half the third, and the legs appear to be relatively shorter than in 

 the other specimens, the process on the femur of the first being small. Measure- 



Fia. 32. — Anthracomartus hindi, sp. n. ; suggested restoration of Lateral surface, taken from several specimens, 

 about two and a half times nat. size. — Coal Measures ; Coseley, near Dudley. 



ments in mm. — Total length 23'5, length of carapace 8*5, width doubtful; length 

 of opisthosoma 15, approximate width 14; length of trochanter and femur of first 

 leg G ; of fourth leg 6"5. 



This specimen, perhaps, represents a different species from the rest. 



(3) Specimen in Dr. Hind's Collection showing no details of special moment. 

 Measurements in mm. — Total length 21 ; length of opisthosoma 13, width 12. 



(4) Specimen in the British Museum, collected by Mr. J. S. Neil, showing the same 

 general features as No. 1, belonging to Dr. Hind, but less clearly. Measurements 

 in mm. — Total length 21'5; length of opisthosoma 15"5. 



(5) Specimen in Mr. Egginton's Collection (No. 22) showing the dorsal surface, 

 the opisthosoma being nearly complete, but the prosoma incomplete, without trace 

 of appendages. Measurements in mm. — Total length 22 ; length of opisthosoma 15, 

 width doubtful. 



(6) A perfect specimen of the opisthosoma in Mr. Egginton's Collection 

 (No. 29). Measurements in mm. — Length of opisthosoma 15, width 14. 



(7) A small specimen in Mr. Priest's Collection appears to belong to this 

 species rather than to the following on account of the shape of the seventh tergal 



