89 



Canchoidea. 



Panopeus validus Smith, Proc. Boston Soc. Nat. Hist., vol. xii, p. 

 278, 1869. A single specimen collected in the Gulf of Fonseca. 



Panopeus transversus Stimp., Annals Lye. Nat. Hist., N. Y., vol. vii, 

 p. 210, 1860. One specimen from Corinto, west coast of Nicaragua. 



Ozius integer, sp. nov. Male. Carapax broad, strongly convex in 

 front but flattened in the middle and posteriorly ; anterior portion of 

 the nasogastric lobe narrow and bordered by deep sulci which fade 

 out before they reach the middle of the carapax; anterior portions of 

 the cervical sulci longitudinal, nearly parallel to the median sulci, and 

 fading out at the same distance from the front; mesobranchial lobe 

 indistinctly circumscribed. Surface of the anterior portion of the 

 carapax, and along the margins even back of the lateral angles, 

 rugose and filled with deep pits as if eroded; median and posterior 

 regions smooth or minutely granulous. Front deflexed and trans- 

 versely channelled, nearly straight as seen from above, but. in a front 

 view, deeply undulated, with two mediau teeth, or lobes, which are 

 prominent, but obtusely rounded. Antero-lateral border with a con- 

 tinuous, slightly upturned margin, not toothed or lobed. but with 

 slightly marked elevations in the margin in place of the posterior 

 teeth. Postero- lateral border rounded and with a veiy slight tooth 

 just back of the lateral angle. Infero-lateral regions naked and 

 granulous. External maxillipeds nearly naked, the meral segments 

 granulous and longitudinally bisulcate. Chelipeds unequal; meral 

 segments short, not projecting beyond the carapax; carpal segments 

 unarmed, outer surface evenly rounded, but somewhat roughened as 

 if eroded; hands rounded, the upper and outer surfaces roughened 

 like the carpi, but in a much greater degree; fingers of the larger 

 hand widely gaping, nearly cylindrical, with a few, low, obtuse teeth 

 within ; fingers of the smaller hand slightly channelled longitudinally 

 and their prehensile edges closely approximating. Ambulatory legs 

 slightly granulous and naked, except the propodi, which are a little 

 pubescent toward the distal extremities, and the dactyli, which are 

 stout, cylindrical, and completely covered, except the horny tips, with 

 a short and very dense pubescence. The abdomen is broadest at the 

 third segment, which projects in an angle on each side between the 

 bases of the third and fourth ambulatory legs ; from the third segment, 

 it tapers regularly to the middle of the sixth, which is nearly as long 

 as broad, with the lateral edges concave; the terminal segment is 

 broader than long aud has the extremity rounded. Length of carapax, 

 15.0mm; breadth of carapax, 23.5 ; ratio of length to breadth; 1 : 1.57. 



A specimen collected at Aspinwall. 

 p. a. s. 12 



