EXPLANATION OF PLATES. 



NOTE. The drawings credited to Foord, Smith and Emerton were 

 prepared under the supervision of Dr. Carpenter, and were loaned 

 by the Smithsonian Institution, for reproduction in the MANUAL. 



PLATE 1. 



FIGURE. PAGE. 



1-13. Lepidopleurus benthus Haddon. Challenger, . . 9 

 14-22. Lepidopleurus belknapi Ball. Challenger, . . 7 



PLATE 2. 



23-31. Lepidopleurus alveolus Sars. Moll. Arct. Norv., 6 



39, 40. Lepidopleurus pagenstecheri Pffr. Moll. S. Georg., 12 



41, 43-46. Lepidopleurus cajetanus Poli. Ross del., . 15 



42. Lepidopleurus cajetanus Poli. Conch. Icon., . 15 

 47-50. Lepidopleurus granoliratus Cpr. Pilsbry del., . 14 

 51-53. Lepidopleurus granoliratus Cpr. Foord del., . 14 



PLATE 3. 



54-57. Lepidopleurus cancellatus Sowb. Moll. Reg. Arct., 3 



58. Lepidopleurus cancellatus Sowb. Ross del., . . 3 



59-63. Lepidopleurus arcticus Sars. Moll. Reg. Arct., 5 



64-66. Lepidopleurus asellus Speng. Ross del., . 13 



67-70. Lepidopleurus rugatus Cpr. Pilsbry del., . 11 



71-79. Hanleya hanleyi Bean. Moll. Reg. Arct., . 17 



PLATE 4. 



74-77. Hanleya hanleyi var. abyssorum Sars. Moll. Reg. 



Arct 18 



|78-81. Lepidopleurus curvatus Cpr. Emerton del., . . 16 

 82-84, 85. Hanleya mendicaria M. & A. Emerton del., . 18 

 83. Hanleya mendicaria M. & A. Inv. Mass., . . .18 



86. Lepidopleurus rarinotus Jeffr. P. Z. S., . See Appendix. 



87. Lepidopleurus catillus Rv. Conch. Icon., . . .10 



88. Lepidopleurus fuliginatus Ad. & Rv. Conch. Icon., . 10 



PLATE 5. 



89-100. Hemiarthrum setulosum Cpr. Challenger Rep., . 20 



(334) 



