226 



NATURAL HISTORY BULLETIN 



Plate XI 



Figure 1. Lopliaster radians Perrier, Portion of dorsal side of a rav X 3. 



Figure la. The same specimen. Under side of portion of a ray of an al- 

 coholic specimen; po, podia; a, adambulacral spines; inferomar- 

 ginals; m, superomarginals ; X 5 



Figure 11). The same. One of the dorsal parapaxilla? ; X 16 



Figure Ic. The same. Adambulacral spines of one plate; X 10 



Figure 2. BeDw.^fer palmatus Perrier. Dorsal view of a part of tlie disk 

 and two rays, X 6. Many of the dorsal spines are removed, to show 

 plates; dorsal pore 



Figure 3. Hosaster aJc.vandri Perrier. Part of disk and tv.o rays of a 

 young specimen, dorsal view; p, dorsal pore; large basal interradial 

 plates; m. madreporic plate. The spinules are partly removed to show 

 form of plates; X 3. 



Figure 3a. The same. Two of the dorsal plates with rosettes of spinules, 

 X 16. 



Figure 3&. The same. Two of the dorsal spinules more enlarged. 



Fignire 4. Asterinides folium (Liitk.) Dorsal view of a six-rayed speci- 

 men, about natural size. 



Figure 5. BlaMaster conicus Perrier. Under side of disk and jaw of the 

 specimen on plate Hi, figure 4, Bahama Exped.; spinules are removed 

 from part of the plates; j. jaw-plate; a, a, adambulacral plates; ai, ai, 

 adoral adambulacral plates, one with spines; ia, ia^, interactinal plates; 

 o, oi, oil, impaired interactinal plates ; p, pit where a pedicellaria was 

 seated. X 5. 



Figure 6. Porania austera Yerrill. Type. Dorsal view of portion of disk 



at base of rays; s, s, superomarginal plates; i, i, inferomarginal plates; 

 j their secondary row of spinules. X 5. 

 Figure 6a. The same specimen. Under side of a portion of the disk and 



base of a ray. X 5. 

 Figure 7. Henricia sexradiaia (Perrier). Under side of a ray. Specimen 



from Bahama Expedition; m, inferomarginal plates; i, iuteractinals ; 



a, adambulacrals: s, s, adambulacral spines. X 16. 



Plate XII 



Figures 1, la. Luidia- alternata iicolor Yerrill. Type. Dorsal and ven- 

 tral views of a part of a ray. X 3. 



Figures Ih. The same. Section of a ray; diagramatic; a, a, ambulacral 

 single ampullae; p, podia; ap, ambulacral plates; ad, adambulacral 

 •pl&te and spines; m, marginal plate and spines; pa, dorsal paxilla:. 



Figure Ic. The same. One of the marginal spines; the shaded portion is 

 chocolate-brown; the unshaded distal part is white. X 13. 



Figure 2. Astropecten nuttingi Yerrill. Type. Dorsal side of proximal 

 part of a ray. X 6. 



Figui'e 2a. The same specimen. Under side of portion of a ray. X 10. 

 From Bahama Expedition. Station ^58. 



Figure 2d. The same. Diagram of profile of a border of a ray. 



