DESCRIPTION OF PLATES. 101 



Plate 4. 

 Fig. 1. Clypeaster dalli (Twitchell). Dorsal view, X 0.7; Gato, Dominican Republic; 



U. S. Nat. Mus. No. 328234. 

 Fig. 2. Clypeaster lanceolatus Cotteau. Dorsal view, X 0.7; Havana, Cuba; Amer. 



Mus. Nat. Hist. No. 18S77. 



Plate 5. 

 Figs. 1, 2. Clypeaster antillarum Cotteau. Holotype, XI; (1) dorsal and (2) 

 ventral views of same specimen; Anguilla; U. S. Nat. Mus. No. 

 115390. 



Plate 6. 



Figs. 1, 2. Clypeaster planipetalus Cotteau. (1) Dorsal and (2) left side views of 

 same specimen, X 0.9; north side of Willoughby Bay, Antigua; 

 U. S. Nat. Mus. No. 328237. 



Figs. 3-5. Clypeaster cryptopetalus, sp. nov. Holotype, X 0.9; (3) dorsal, (4) ven- 

 tral, and (5) left side views of same specimen ; Rifle Butts, Antigua ; 

 U. S. Nat. Mus. No. 328239. 



Figs. 6-8. Clypeaster cotteaui Egozcue. (6) Dorsal, (7) ventral, and (8) left side 

 views of same specimen ; X 0.9; near Guantanamo, Cuba; C. T. 

 Ramsden's collection. 



Plate 7. 



Figs. 1,2. Clypeaster placentoid.es, sp. nov. The holotype is the smaller specimen 

 resting on the dorsal side of the larger, which is the same species ; 

 X 0.9; (1) dorsal and (2) left side views of same ; near Guantanamo, 

 Cuba; C. T. Ramsden's collection. 



Fig. 3. Clypeaster oxybaphon, sp. nov. Paratype, X 0.9; dorsal view; Guanica 

 Harbor, Porto Rico; Amer. Mus. Nat. Hist. No. 18567. 



Fig. 4. Clypeaster oxybaphon, sp. nov. Paratype, X 0.9; ventral view; Guanica 

 Harbor, Porto Rico; Amer. Mus. Nat. Hist. No. 18568. 



Figs. 5, 6. Echinarachnius sebasliani, sp. nov. (5) Holotype, dorsal view; (6) para- 

 type, dorsal view; X 0.9; San Sebastian, Porto Rico; Amer. Mus. 

 Nat. Hist. No. 18570. 



Fig. 7. Encope latus, sp. nov. Holotype; dorsal view; X 0.9; the vertical axis of this 

 figure is twisted to the left; compare text-figure 5, p. 51; Govern- 

 ment Road, Aguadilla to Rincon, Porto Rico; Amer. Mus. Nat. 

 Hist. No. 18572. 



Plate 8. 



Figs. 1, 2. Clypeaster oxybaphon, sp. nov. Holotype, XI; (1) dorsal and (2) left 

 side views of same specimen; north side of Willoughby Bay, 

 Antigua; U. S. Nat. Mus. No. 328241. 



Fig. 3. Clypeaster oxybaphon, sp. nov. Paratype, X 1; dorsal view, north side 

 of Willoughby Bay, Antigua; U. S. Nat. Mus. No. 328242. 



Plate 9. 



Figs. 1, 2. Clypeaster platygaster, sp. nov. Holotype, X 0.9; (1) dorsal and (2) ven- 

 tral views of same specimen; Havana, Cuba; Amer. Mus. Nat. 

 Hist. No. 18569. 



Fig. 3. Peronella mirabilis, sp. nov. Holotype, X 1.8; dorsal view; Mount Moriah, 

 San Fernando, Trinidad; U. S. Nat. Mus. No. 328247. 



Figs. 4, 5. Echinoneus cyclostomus Leske. (4) Dorsal and (5) ventral views of same 

 specimen, X 1.8; Anguilla; U. S. Nat. Mus. No. 115402. 



Figs. 6-8. Parapygus antillarum (Cotteau). Cotype, X 0.9; (6) dorsal, (7) ventral, 

 and (8) right side views of same specimen; St. Bartholomew; 

 U. S. Nat. Mus. No. 115417. 



Fig. 9. Parapygus antillarum (Cotteau). Cotype, X 0.9; ventral view; St. Bartholo- 

 mew; U. S. Nat. Mus. No. 115420. 



