262 



BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



FIG. 287. 



FIG. 286. 



FIG. 289. 



FIG. 290. 



FIG. 291. 



FlGS. 286-291. 286, VENTRAL VIEW OF THE CENTRODORSAL OF A SPECIMEN OF PSATHYROMETRA FRAGILIS FROM NORTHERN JAPAN. 



287, VENTRAL VIEW OF THE CENTRODORSAL OF A SPECIMEN OF LEPTOMETRA CELTICA (AFTER P. H. CARPENTER). 288, VEN- 

 TRAL VIEW OF THE CENTRODORSAL OF A SPECIMEN OF ERYTHROMETRA RUBER FROM SOUTHWESTERN JAPAN. 289, VENTRAL 

 VIEW OF THE CENTRODORSAL OF A SPECIMEN OF PEROMETRA DIOMEDILE FROM SOUTHERN JAPAN. 290, VENTRAL VIEW OF 

 THE CENTRODORSAL OF A SPECIMEN OF HATHROMETRA DENTATA FROM SOUTHERN MASSACHUSETTS. 291, VENTRAL VIEW OF 

 THE CENTRODORSAL OF A SPECIMEN OF TRICHOMETRA ASPERA FROM GEORGIA. 



