144 N£nciiJjis FnoM iy/:sT /\i>f;s—L',tTifr,L\\. 



METOPAULIAS. new genus.' 



A .liiapsoid cnib beioiigiiig to that section of tlie family Grapsida' in 

 wbieli the iiiaxiliii)eils are crossed by an oblique ridge. Carapace 

 tlat, sides arcuate, unideutate. Front less than half the width of the 

 carapace, abruptly deriexed, concave, margins acutely lol)ate. Antenna' 

 not excluded from the orbit. .Merus of external maxillip«'<ls very broad 

 and rounded anteriorly, with an oblicjue i)iliferous ridge. Ambulatory 

 legs long and slender. Allied to Sr.sarnnt. 



METOPAULIAS DEPRESSUS, new species. 



Carapace subquadrate, entirely fiat except (lose to the niargins, 

 sides arcuate anteriorly. Suiface i)unctate, slightly roughened ante- 

 ri(nly. Mesogastric and cardiac regions marked by deep sulci. Bran- 

 chial and hei)atic regions separated only by shallow pits. Front 

 deeply concave both longitudinally and transversely, longer inwardl.\ 

 tlian outwardly; su])erior margin with 4 lobes having a sharp granu 

 lated edge and one or more granulated ridges across their upper sur- 

 face. Lobes separated by U-shaped sinuses, the median sinus twice as 

 wide and more than twice as deej) as the lateral. Margin of lobes 

 oblique, the inner pair most advanced inwardly, the outer pair most 

 adviinccd outwardly, or next the orbit. Lower margin of front with 

 two prominent subtruncate lobes separated by a shallow sinus. Outer 

 orbital tooth rather slender, acute. Tooth of lateral margin small, 

 obtuse. Outer maxillipeds widely gaping; merus shorter than the 

 ischium, neiirlj' as broad as long, extremity broadly rounded, scarcely 

 emarginate for the insertion of the palpus. 



Chelipeds in the female rather short and rough; merus and carpus 

 with ti-ansverse granulated ruga*; outer margin of the lower surface of 

 the merus spinulous; inner border laminate and irregularly dentate. 

 Hands tuberculate outside and in, the tubercles having a tendency to 

 form rugose lines. Fingers punctate, the dactylus tuberculate on its 

 upi)er surface for its proximal half. Fingers in female not gaping. 

 .Ambulatory legs with upj^er margin of meral and carpal Joints minutely 

 si)inulous; both margins of pro^jodi and dactyli with larger spinules. 



Length, from inner lobes of front, 18.5 mm.; greatest width, 1!>.8; 

 anterior widtli, 17. 



Ti/j>r lonilitt/. — Newport Manchester, Jamaica (No. 11>4()7, IT.S.N.M.^. 

 Young spe( imens were taken at Accomj)ong. 



From fiirct^TToi-, trout, ;iu»I <rrAo?, groove. 



