EOCTENIZA. 33 



the anterior portion of the carapace is concealed ; there is no evidence therefore that 

 it projected forwards as in tlie otlier specimen. The greater portion of the chehi 

 is preserved, and the clieliceree project forwards between their bases as a pair of 

 slender rods. The coxae of the posterior three pairs of legs are to be seen 

 radiating from the narrow sternal area, and the legs of the second and third pairs 

 are preserved nearly down to the ends of the tibia?. The femnr of the fonrth leg 

 is noticeably shorter than in No. 40. This difference may possibly be a question 

 of age, the specimen now described being smaller than No. 40. In the chela 

 the femoral segment appears to be spined internally. Approximate measuremputs 

 in mm.: Total length 11; median length of carapace 3*o, width 4; length of 

 opisthosoma (rb, Avidth 5; length of fennir of second leg 4, of third 5, of fonrth 

 5'5; coxa and trochanter of chela 2, femur 2, tibia 2'5. 



No. 20 : Larger than No. 2, but showing almost exactly the same features ; the 

 femur and tibia of the chela armed internally with a pair of spines. Appro;nmaie 

 measurements in mm.: Total length 15'5; length of carapace 5, wddth about G; 

 length of opisthosoma 1>, width G"5 ; length of femur of second leg 7, of third 

 7'5, of fourth 9; length of femur of chela o, its width 1-8; length of tibia of 

 chela 4, its width 1'8. 



In Mr. Henry Johnson's Collection from Coseley there is a specimen less w^ell 

 preserved than those described above and showing no points worthy of special 

 comment. Its total length is about lo*5 mm., of which the carapace is 5 mm. and 

 the opisthosoma 8*5 mm. ; femur of third leg 6'5 mm. 



In the Museum of the Geological Survey, Jermyn Street, there are a well- 

 preserved opisthosoma, measuring 15 mm. long and 8 mm. wide, and a carapace 

 measuring 4*5 mm. long and 6 mm. wide, which perhaps belong to the same 

 species. They were found at the tip of an abandoned shaft (Glasbrook's) close 

 to Cadoxton village, one and one-eighth miles north-east of Neath Station in S. 

 Wales. There is no reason to suppose that these fragments belong to the same 

 specimen. It may be noted that this carapace bears considerable resemblance to 

 that of (j. scnJderi, but has the produced anterior region larger. 



Onter ARANE^, Sundevall. 



Svhorder MESOTHEL^. 



Genus EOCTENIZA, no v. 



Generic Cliaracters. — Carapace with its anterior portion somewhat sharply con- 

 stricted to form a narrow^, rounded, elevated, and convex cephalic area, defined 

 from the large and broadly cordate posterior portion by a pair of shallow grooves, 



5 



