■6 PROCEEDINGS OF THE ISTATIONAL, MUSEUM vol.73 



few and small lateral teeth it is like H. quadrilobatus (Desmarest)/ 

 and H. souverbiei (A. Milne Edwards) ; - in the shape of the major 

 chela of the male it resembles H. inacrodactylus (Milne Edwards) ; ^ 

 while the astonishing sexual dissimilarity and inequality of the 

 chelipeds is paralleled by H. punctulatus (Desmarest), which is de- 

 scribed at length from abundant material by A. Milne Edwards,* 

 The chelae of the female are of the same type as those of Zanthoj)sis 

 leacMi (Desmarest)^ and have similar ornamentation. The carapace 

 of H. mnericanus, however, though uneven is not lumpy as it is in 

 even the smoothest of the Zanthopsis species. 



EXPLANATION OF PLATES 



Plate 1 



Notosceles iournei 



Figs. 1-3. Paratype, near Kerens, Navarro County, dorsal view, X 1^^. 

 1. Dorsal view. 2. Ventral view. 3. Left profile, ventral side 

 uppermost. 

 4. Holotype, 4 miles N. of Kerens, dorsal view, X 10. 



Plate 2 



Harpactocardnus americanus 



Figs. 1 and 2. Chelae, supposedly of holotype, X 1%. 1. Outer view. 2. Inner 

 view ; St, 3 tubercles on lamina. 

 8 and 4. Holotype, ?, X 1%. 3. Dorsal view. 4. Ventral view. 



5. Paratype 6, ventral view, X 2 ; a, basal article of antenna. 



6. Paratype a, 5, fronto-dorsal view, X 2. 



Plate 3 



Harpactocareirms americanus 



Figs, land 2. Paratype c, S , X ly^. 1. Ventral view; e, end of movable 

 finger ; r, uppermost of 3 proximal tubercles on palm ; s, conical 

 swelling opposite interdigital sinus. 2. Dorso-frontal view; t, 

 sole antero-lateral tooth; r and s, as above. 



3. Paratype f, merus and carpus of left cheliped, upper-outer view, 



^ 1% ; P, posterior angle of carpus ; t, thin proximal-outer 

 edge of merus. 



4. Merus of a left ambulatory leg, outer view, X 2. 



5. Paratype d, left dactylus of $ , outer view, X 1% ; t, tooth at 



middle. 



lA. Milne Edwards, Ann. Sci. Nat., Zool., ser. 4, vol. 18, 1862, pi. 4, fig. 1. 

 ''Idem, pi. 6, fig. 3. 

 = Idem, pi. 10, fig. la. 



* Idem, pp. 68-70, pi. 8, flgs. 1, la ; pi. 9, flgs. 1, lo. 



6 Bell, Monograpln Foss. Malac. Crust. Greiit Britain, pt. 1, 1857 (publ. 1858), pi. 1 

 fig. 3. 



o 



