^^I89i!^'] PROCEEDINGS OF THE NATIONAL MUSEUM. 373 



separates the sixth and seventh segments of the sternum and comes in 

 contact with the anchylosed segment of the abdomen. In other speci- 

 mens the coxiTB are entirely separated from the anchylosed segment. 



Carpi and hands coarsely granulate, not rugose. Car[)al groove well 

 marked. Both hands have the double crest above. Fingers of larger 

 specimens white, in the smaller ranging from verj- dark to very light, 

 with nearly the distal half white. Tooth on the dactyl sometimes 

 wanting. 



In some instances the ambulatory feet are banded with color, and 

 there is a large purple spot on the gastric and a smaller one on the 

 cardiac region. 



Two specimens collected by Mr. R. Eathbun at Bom Fim, Bahia, Brazil, 

 have been doubtfully referred to this species. The carpi and hands 

 are slightly rugose, but the general appearance is that of wurdemannii. 



Length of carapace, 5.5 millimetres; width, 7 millimetres. 



RECORD OF SPECIMENS EXAMINED. 



Florida: Garden Key, Dry Tortngas (3-217) ; Marco (156G7) ; Sarasota Bay (15666); 

 Goodland Point (I'lCieS). 

 Bom Fim, Bahia, Brazil; R. Rathbun, Hartt Explorations, 1875-1876. 



18. Panopeus angustifrons, sp. nov. 



(Plate XXII, fig. 3; plate xxiv, fig. 18.) 



Carapace convex ; areolations fairly well marked. In many sjieci- 

 mens a slight ridge runs from the base of the last anterolateral tooth 

 to the gastric lobes. 



Front very narrow, much produced, divided into four lobes, the mid- 

 dle lobes separated by a promineut V-sliaped notch From the notch 

 the margin curves backward to the lateral lobes which are small and 

 inconspicuous. 



Orbits with two fissures above ; the space between the fissures rounded 

 and produced. ' 



Anterolateral edge thin and upturned. In the coalesced tooth the 

 sinus is shallower in the adult than in the young ; the orbital angle is 

 sharp, posterior angle rounded. Second tooth broad ; anterior edge 

 running nearly perpendicular to the median line of the carai)ace. Pos- 

 terior edge much longer than the anterior and cut obliquely backwards 

 and outwards from the tip. In the third tooth the anterior and poster- 

 ior margins are more nearly equal ; the posterior, however, a little the 

 longer. Posterior tooth shorter, sharper, and less prominent than the 

 others. The teeth are separated by narrow deep cuts. 



Inner lower angle of the orbit pointed, conical, and produced much 

 beyond the inner upper angle. External fissure usually deep, closed at 

 the bottom, widely spreading at the opening. Hepatic tubercle want- 

 ing. The pterygostomian region is much swollen. The maxillipeds are 

 quadrate, their external anterior angles rounded. 



