.Smith.] 280 [February .'i. 



The general outline of the carapax is very similar to that of P. 

 lh rhst ii of the same size, hut the carapax is smoother, the areolets 

 slightly swollen and more distinctly marked, the three posterior teeth 

 of the antero-lateral margin are broad and stout, obtusely triangular, 

 strongly upturned, and not at all hooked forward; the carpus is 

 smooth and the groove on the outer anterior margin is rather broad 

 and shallow; the hands are very much as in fferbsti t but smoother; 

 the ambulatory feet are relatively longer and slenderer than in 

 Herbsti. 



Length of carapax in the single male specimen, 20.9 millim.; 

 breadth, 29.2; ratio, 1:1.40. 



Panopeus serratus Saussure, op. cit., p. 16, pi. i, fig. 7. 



I refer to this species a single female specimen collected at St. 

 Thomas by Prof. C. F. Hartt. It differs from the last species in the 

 rougher carapax, the more slender and acute teeth of the antero- 

 lateral margin, and markedly in the very rugose upper sides of the 

 carpi and hands. From P. Harttii it differs in having the carapax 

 much nan'ower in proportion, much more convex, the areolets not 

 nearly so well marked nor so prominent, and the front only very 

 obscurely four-lobed. 



Length of carapax, 12.2 millim.; breadth, 16.2; ratio, 1 : 1.33. 



Panopeus Harttii, sp. nov. 



Carapax broadest at the penultimate teeth of the antero-lateral 

 margin, convex anteriorly, slightly flattened behind; areolets well 

 marked and somewhat protuberant anteriorly ; coarsely granulous and 

 slightly pubescent on the front and antero-lateral borders; hepatic 

 regions prominent and bearing a transverse ridge; anterior lobes of 

 the gastric region prominent; the anterior part of all the regions 

 crossed transversely by slight granulous, rugas. Front very much de- 

 flexed, the anterior edge thin and four-lobed, the median lobes much 

 the largest, evenly rounded, and a little more prominent than the 

 lateral, which project as small obtusely triangular teeth. Post-orbital 

 tooth short and slender, and separated from the second tooth of the 

 antero-lateral margin by a broad sinus which breaks the margin com- 

 pletely; remaining teeth triangular in form, much thickened verti- 

 cally, and separated by quite broad sinuses, the posterior two on each 

 side very slender, and of nearly equal prominence. Inferior lateral 

 regions coarsely granulous. Inferior margin of the orbit broken by a 

 deep fissure, the inner lobe forming a stout tooth, the outer lobe 



