NATURAL SCIENCES OF PHILADELPHIA. 241 



Family CENOBITID^E. 



Cenobita diogenes, Latr. M. Edw. Hist. Nat. des Crust., torn. II., p. 240, pL XXII., 

 figs. II and 1.3. 



Cenobita intermedia, nov. sp. 



Anterior portion of carapax convex, narrowed in front, -granu- 

 lated. Differs from C. purpurea, Stm., in not being more granu- 

 lated posteriorly than anteriorly, nor are the granules acute and 

 setous. Lateral portion pilous ; margin of branchial region pro- 

 jecting, prominent. E^^^es compressed, triangular, acute ; pedun- 

 cles nearlj' as high as long, finely granulated on superior surface. 



Til)ia of the third pair of legs, left side, produced at inferior 

 border; ultimate and penultimate articles convex externally', 

 smooth and punctate as in C. purpurea; tarsus irregularly quadri- 

 lateral, longer than right ; inferior surface concave; fine, close-set 

 row of black-tipped spinules on inferior surface of tarsi of second 

 and third legs, left side. Legs spinulose (with exception men- 

 tioned), hairj'^; tarsi triangular, concave on inferior surface. Ex- 

 ternal surface of larger hand sparsely granulated; granules of a 

 pearly appearance. Coxa? of fifth pair produced in male. Length 

 of carapax .94 inch. 



Cenobita panamensis, nov. sp. 



Carapax as in C. intermedia. Eyes also similar. Tibia of third 

 leg, left side, slightly produced at inferior angle; penultimate 

 article convex externally and granulated, in this respect differing 

 from C. purpurea and C. intermedia; tarsus irregularly quadrilate- 

 ral, shorter than right, thereby differing from C. perlata and C. in- 

 termedia; row of spinules on supero-lateral margin; row on supe- 

 rior surface; spinules sparsely on external surface; denticulated 

 ridge on inferior surface of tarsi of second and third pairs ; 

 spinules black-tipped ; inferior surface not so much evacuated as 

 in C. intermedia, triangular. Larger hand granulated ; granules 

 acute, except on external surface, black-tipped. Coxae of fifth 

 pair produced in male. 



Length of carapax 1.62 inch. 



1871.] 



