228 NATURAL HISTORY BULLETIN 



Fi^re 5. Goniaster americanus Verrill. Portion of the under side of tlie 



disk, with the jaw. X 4i/4. 

 Figure 5a. The same. Dorsal plates, with fossate pedicellarirp. X '-'0. 

 Figure 6. Odontaster hispidu.'i N'crrill. I'ortion of dorsal side of a ray; 



l), dorsal parapaxilla'j in, superoniargiual plates; v, v, inferomarginal 



spines. X 6. 



Plate XIV 

 Figure 1. Peetinaatcr dispar Verrill. Type. No. 1S,4G8. Part of under 



side of a ray; plates 6 to 9. X 5. 

 Figure la. The same specimen. Papulaiiuin. X lij. 

 Figure lb. The same specimen. Portion of the dorsal side of a ray. 



X 5. 

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



Station 2, Bahama Expedition. 

 Figure 3. C. ecliinulatus Perrier. No. 10,109. N. Mus. Part of disk, 



under side. X 8. 

 Figure 4. Pectina^tcr gracilis Verrill. Sta. 238. Portion of under side 



of a ray. X 10. 

 Figure 5. CJieiraster mirabiUs Perrier. From station 34, Bahama Ex- 

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

 Figure 5«. 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 showing one sutural pectinate pedicellaria 



between two interactinal plates. X 9. 

 Fig-ure Ifl. The same specimen. Upper side of distal portion of a ray, 



with spiuules removed from dorsal jilates. X 9. 

 Figure lb. The same specimen. Base of ray and j»apularium in early 



stage of development with only three pores. X 15. 

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



the sjiinules removed from part of the plates. X (3. 

 Figure 3. Pectinaster forcipaius (Sladen). No. 18,488. Papularium of a 



young specimen; d, dorsal pore. X 12. 

 Figure 4. The same species, No. 18,488rt, N. Mus. Papularium with the 



spinules removed from plates. X 12. 

 Figure 5. Poraniella regularis Verrill. Tyi)e. No. 10,190. Nat. Mus. 



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

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



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

 Figure 5b. The same. Adambulacral spines of one plate; /', turrow-comb 



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

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



Plate XVl 

 Figure 1. Astropccten americanm Verrill. No. 25,149. N. Mus. Under 



side of part of disk and a jaw, showing papilliform pedicellarite 

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



