PLATE XII. 



Fig. I. Ccratoplax truncaüfrons Rathbun, cf, magn. lO. Fig. la cephalothorax, anterior view, magn. lo. 

 Fig. \b external maxilliped, magn. 20. Fig. \c left chela of cf. outer view, magn. 10. Fig. \d 

 right chela of cTi outer view, magn. 10. Fig. \e abdomen of cf, magn. 10. 



Fig. 2. Lophoplax bicristata n. g. n. sp., ^, magn. 8. Fig. 2a external maxilliped, magn. 15. Fig. 2^ abdomen 

 of cf , magn. 8. 



