348 



BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



KEY TO THE SPECIES OF THE GENUS THOE 



A'. Upper surface of merus and outer surface of carpus of cheliped not excavate. 



B'. Carapace and basal segment of antennae without spines puella, p. 348. 



B^. Carapace with a spine at postero-lateral angle; basal segment of antennae 



with two distal spines aspera, p. 352. 



A^. Upper surface of merus and outer surface of carpus of cheliped deeply excavate 

 into several contiguous depressions. 

 B'. Upper or anterior margin of legs entire or nearly so. 



C. One anterior tooth or lobe on basal antennal article. Two rows of deep 



excavations on arm erosa, p. 351. 



C^. Two anterior teeth or lobes on basal antennal article. Outer row of 



excavations on arm obsolescent panamensis, p. 351. 



B^. Upper or anterior margin of legs spinous, the proximal spine of the series 

 not marginal but situated on the posterior surface and conspicuous in 

 legs of first three pairs. Two anterior teeth or lobes on basal antennal 

 article sulcata, p. 349. 



Analogous species on opposite sides of the continent: puella (At- 

 lantic), sulcata (Pacific). 



THOE PUELLA Stimpson 



Plate 125, figs. 1 and 2 



Thoe puella Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, p. 178 

 (type-locality, Tortugas Is., Florida; type not extant). — A. Milne 

 Edwards, Crust. Reg. Mex., 1873, p. 122, pi. 19, figs. 3-3e. 



Pisa latipes Desbonne, in Desbonne and Schramm, Crust, de la Guade- 

 loupe, 1867, p. 19 (type-locality, Guadeloupe; cotype in Paris Mus.). 



Diagnosis. — Sides of carapace perpendicular and nearly straight. 

 Basal antennal joint not grooved. Margins of merus-joints of ambu- 

 latory legs thin. 



Description. — Antero-lateral margins straight or nearly so; lobu- 

 lations of dorsal surface well marked, covered with berry-like bunches 



of granules crowded together. Rostral 

 horns separated by a deep, narrow fis- 

 sure. Antennae fringed with long hair; 

 basal joint as wide as long, with antero- 

 external angle a blunt tooth. Arm and 

 WTist of chelipeds covered with fine 

 granulations, the arm with a line of 

 tubercles on upper margin; hand smooth 

 and shining except near articulation, 

 where it is granulate, superior margin 

 sharp for its proximal half; fingers finely 

 serrulate within, a very shallow tooth 

 near base of dactyl in male; fingers 

 rather vvddely gaping in adult male; 

 narrowly gaping in adult female. The 

 inferior laminate crests on merus joints of ambulatory legs longer 

 than superior and about twice as wide; their upper surfaces concave, 



Fig. 111.— Thoe puella (14442), 

 maxiluped, x 18.2 



