ART. 9. FOSSIL CKABS FEOM HAITI — RATHBUX. 3 



black, backward-pointing tooth at its base. At the distal end of 

 the carpus, above the middle, a rounded lobe projects toward the 

 palm. 



One specimen (pi. 2, fig. 2) shows a ventral view of the sternum 

 and abdomen of a male. The sternum has a nearly transverse ridge 

 between the bases of the chelipeds. The abdomen is triangular from 

 the fourth segment to the tip ; terminal segment triangular, appear- 

 ing a little broader than long, although the full length may not be 

 shown; the real length of the sixth segment does not appear, 

 as it has been encroached upon by the long, coalesced segment (third 

 to fifth) , which is moved anteriorly out of its place. 



Additional lot of sfecitnens. — Republic of Haiti; right bank of 

 Eiver Fond Bleu; station 14 of traverse; Maissade tongue of the 

 Thomonde formation; lower Miocene series; February 2, 1921; W. 

 V. Woodring (9717); two carapaces, fragmentary; also parts of 

 one male abdomen and sternum; Cat. No. 333429, U.S.N.M. These 

 are considerably larger than the type lot, one specimen {a) meas- 

 uring about 54 mm. wide to base of lateral spine, the other {h) 

 much larger, over 82 mm. wide to base of spine. These are not so 

 uneven as smaller carapaces ; the same elevations and depressions are 

 present, but are less striking. Similar growth changes occur in other 

 Portunids. In the smaller specimen the size and general direction 

 of the orbit are shown; its width to the outer base of the antennal 

 tooth is 8 mm., while the width across the front (6 teeth) is 11 mm.; 

 upper margin of orbit oblique (the outer orbital tooth being well 

 behind the inner tooth) and little concave; no notches can be made 

 out. A row of punctae subparallel to the anterolateral margin begins 

 at the base of the preorbital tooth (pi. 1, fig. 1). In the larger 

 specimen the fifth abdominal segment is separated from the sixth 

 (pi. 2, fig. 3). 



Doubtful specimen. — Republic of Haiti : Trail from Las Cahobas 

 to Thomonde, about 1.5 km S. S. E. of Thomonde ; top of Thomonde 

 formation ; lower Miocene series ; January 15, 1921 ; W. P. Woodring 

 (9778) ; one carapace with sternum and male abdomen, one fragment 

 of cheliped and one of an ambulatory leg; Cat. No. 333431, U.S.N.M. 



The surface of the carapace is obliterated and nearly all of the 

 border; the outline of the orbit indicates the genus; the abdomen 

 may perhaps be the same as male, No. 97175 ; its outlines are much 

 broken away, but it shows a suture between fifth and sixth segments. 



? ZANTHOPSIS, species. 



Plate 2, figs. 6 and 7. 



Republic of Haiti: Road from St.-Michel to Ennery, W. slope 

 about 1 km from divide; Plaisance limestone; Middle Eocene series; 

 March 4, 1921; T. W. Vaughan and W. P. Woodring (9792) ; palm 



