228 NATURAL HISTORY BULLETIN 



Figure 5. Goniaster americanus Veriill. Portion of tlie under side of tlie 



disk, with the jaw. X ^V-i- 

 Figure 5a. The same. Dorsal plates, with fossate pedicellariae. X I'O. 

 Figure 6. Odontoster hispiihis Yerrill. Portion of dorsal side of a ray; 



p, dorsal parapaxilla'; //;. superomarginal plates; v, v, inferomarginal 



spines. X 6. 



Plate XIV 



Figure 1. Pccilnu^ler dispar Verrill. Type. No. 18,468. Part of under 



side of a ray; plates 6 to 0. X 5. 

 Figure la. The same specimen. Papularium. X 15. 



Figure Ih. The same sj^eeimen. Portion of the dorsal side of a ray. 

 X 5. 



Figure 2. Cheirastcr mirahUis Perrier. Part of a ray, under side. X 7. 



Station 2, Bahama Expedition. 

 Figure 3. C. echinuJatus Perrier. Xo. 10,109. X. Mus. Part of disk, 



under side. X 8. 



Figure 4. Pectinaster gracilis Verrill. Sta. 238. Portion of under side 

 of a ray. X 10. 



Figure 5. Cheiraster mirahUis Perrier. From station 34, Bahama Ex- 

 pedition. Part of disk and base of a ray, showing papularium. X 5. 

 Figure 5a. The same specimen. Portion of under side of a ray. X 5. 



Plate XV 



Figure 1. Pectinaster gracilis Verrill. Cotype. Young. Sta. 238. Part 



of under side of the disk sho\viug one sutural pectinate pedicellaria 



between two interactinal plates. X 9. 

 Figure la. The same specimen. Upper side of distal portion of a ray, 



with spinules removed from dorsal plates. X 9. 

 Figure 1Z>. The same specimen. Base of ray and papularium in early 



stage of development with only three pores. X 15. 

 Figure 2. Pectinaster mixtiis Verrill. Cotype. Distal part of a ray with 



the spinules removed from part of the plates. X 6. 

 Figure 3. Pectinaster forcipatus (Sladen). Xo. 18,488. Papularium of a 



young specimen; d, dorsal pore. X 12. 

 Figure 4. The same species, Xo. 18,488fl. X. Mus. Papularium with the 



spinules removed from plates. X 12. 

 Figure 5. Poraniella regiilaris Verrill. Type. Xo. 10,190. Xat. Mus. 



Under side of two rays and part of disk. X 6. 

 Figure 5a. The same specimen. Dorsal side of a ray; s, superomarginal 



plates; i, inferomarginals; j, secondary row of spines on the latter. 

 Figure 5fe. The same. Adambulacral spines of one plate; /, furrow-comb 



of three spines; e, two spines of actinal face. 

 Figure 6. Poranisca lepidus Ver. Type. One of the jaws. X 10. 



Plate X VI 



Figure 1. Astropecten americanus Verrill. Xo. 25,149. X. Mus. Under 

 side of part of disk and a jaw, sho^^ing papilliform pedicellarige 

 (P, P) on adambulacral plates. X 7. 



