THE SPIDER CRABS OF AMERICA 



533 



.£3 « 



^'z 





3=3 



^O lO o ^ 



C5 aa -^ '^ 



'b'b 



c o o »' s; 

 i « o 





—t'^-' C4 



■»*• irj 00 be* 



(N — iM s : 



OOOO C3'^ 



■^J* -.^ CC 



o oo 





03 O O O 



BQQQ 



touching front. Endognath with a 

 longitudinal row of three spinules, 

 two on ischium, one on merus. Ster- 

 num armed with a downward-point- 

 ing spine at base of chelipeds, and in 

 male is deeply hollowed in front of 

 abdomen. Arm very stout in prox- 

 imal two-thirds, and armed with a 

 few acicular teeth on anterior and 

 upper surfaces ; of these, two or three 

 are on the lower-inner and on the 

 upper-inner border. Three teeth on 

 inner margin of carpus. Spines of 

 propodus and dactylus number five 

 or six in lower and six or seven in 

 upper series; they are curved inward 

 and directed distad. Fingers slender, 

 curved inward, tips prolonged in sharp 

 spines; prehensile edges armed with 

 small, sharp, unequal teeth. Legs 

 very rough, margins dentate ; dactyli 

 armed with outstanding lobes and 

 spines. 



Measurements. — Female, holotype, 

 length of carapace 16, width of same 

 23.5, length of cheliped about 32 mm. 

 Male (9515), length of carapace 14, 

 width of same 20, length of cheliped 

 about 34 mm. 



Range. — Off Havana, Cuba; Mauri- 

 tius; Andaman Sea. 36 to 200 

 fathoms. 



Material examined. — See table, 

 page 533. 



THYROLAMBRUS EROSUS Rathban 



Plate 197; plate 281, fig. 2 



Thyrolambrus erosus Rathbun, Proc. 

 U. S. Nat. Mus., vol. 21, 1898, p. 

 579, pi. 42, fig. 1 (type-locality, off 

 Cape St. Lucas, 31 fathoms; holo- 

 type, Cat. No. 21577, U.S.N.M.). 



Diagnosis. — Reticulation of surface 

 nearly smooth. Postero-lateral mar- 

 gins nearly transverse; teeth rounded 

 or lobiform. Chelae armed on the 



5487—251- 



