48 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
ao f. WwW Ww 
5. 
Dr. T. Wright on new Species of Echinodermata. 
EXPLANATION OF PLATES I. IJ. ann III. 
Puate I. 
. Cidaris Edwardsii: a, natural size, and restored to its globular 
form; 6, portion of an ambulacral area magnified, showing the 
pedal pores and tubercles ; c, primary tubercle, with its circle of 
areal granules, magnified ; d, one of the jaws and its tooth, of the 
natural size; e, secondary spine, natural size and magnified ; 
f; primary spines, natural size and magnified. 
. Cidaris Bouchardw: a, b, natural size; c, primary tubercle and 
ambulacral area, magnified. 
. Hemicidaris minor: a, natural size; b, magnified two diameters ; 
c, primary tubercle and ambulacral area, magnified. 
. Pedina Bakeri: a, natural size; 6, magnified one and a half dia- 
meter ; c, primary tubercle and ambulacral area, magnified. 
. Pedina Etheridgii: a, natural size; 6, upper surface and ovarial 
plates, magnified two diameters; c, under surface and mouth- 
opening, magnified two diameters ; d, primary tubercle and ambu- 
lacral area, magnified. 
Puate II. 
. Acrosalenia crinifera: a, natural size; b, upper surface, magnified 
three diameters; c, under surface, magnified three diameters ; 
d, primary tubercle and lateral granules, magnified. 
. Diadema Davidsoni: a, under surface and mouth-opening, natural 
size; b, upper surface and anal opening, natural size; c¢, side 
view, showing the tubercles of both areas; d, base of one of the 
ambulacral areas, showing the clustering together of the pedal 
pores in this region; e, primary tubercle, ambulacral area, and 
pedal pores, magnified. 
. Diadema Moorei : a, natural size ; 6, upper surface and ovarial disc, 
magnified two diameters; c, under surface and mouth-opening, 
magnified two diameters; d, primary tubercle, circle of granules, 
and pedal pores, magnified. 
. Polycyphus Deslongchampsii : a, natural size ; 6, upper surface and 
ovarial disc, magnified one and a half diameter; c, outlme of the 
mouth-opening ; d, genital and ocular plates of the ovarial disc, 
magnified; e, primary tubercle, areal granules, pedal pores, and 
ambulacral area enlarged. 
Nucleolites Woodwardii: a, upper surface, of the natural size ; 
6, side view, of the natural size; c, ambulacral area and pedal 
pores, magnified two and a half diameters ; d, tubercles and areas, 
magnified ; e, mouth-opening and ambulacral area, magnified one 
and a half diameter. 
. Nucleolites Michelini : a, upper surface, reduced one-third in size ; 
- 6, lateral view, reduced one-third in size; c, a portion of the am- 
bulacral area and pedal pores, natural size. 
Puate III. 
. Ophioderma Gaveyi : a, disk, with portion of the rays, natural size ; 
6, part of the upper side of a ray, enlarged three diameters ; 
ce, under side, enlarged three diameters. 
. Ophioderma Griesbachii: a, natural size; 6, disk and a part of the 
rays, enlarged three diameters. 
. Pentacrinus Goldfussii: natural size. 
