SHALLOW- WATER STARFISHES 179 



Subgenus Stylasterias Verrill, nov. 



Interactinal plates rudimentary or small, disk-like, standing edge- 

 wise, and spineless. See p. 48. 



ORTHASTERIAS FORRERI (de Loriol). 



Plate LXV, figure i (dorsal side) ; plate LXVI, figures i, 2 (dorsal and actinal 

 sides) ; plate LXX, figure 7 (portion enlarged) ; plate LXXVII, figures i-id 

 (spines and pedicellariae) ; plate LXXX, figures i-ie (pedicellarise, etc.). 



Asterias forreri DE LORIOL, Notes pour servir a 1'etude des Echinodermes, 

 No. II, Recueil zoologique Suisse, iv, No. 3, June 23, p. 401, pi. 18, fig. 

 i, i88jf. 7 Jennings, Johns Hopkins Univ. Circular, No. 195, p. 16, 1907 

 (habits, name not used) ; Univ. Calif. Publ., Zool., iv, pp. 53-185, 19 text- 

 figures, 1907 (behavior). 



A five-rayed species with long, gradually tapered, convex rays, 

 covered with long, tapered, well spaced spines and with a multitude 

 of remarkably large, unguiculate minor pedicellariae in large cir- 

 cumspinal wreaths. 



The largest specimen (No. 1823) has the radii 20 mm. and 

 215 mm.; ratio, i: 10.75. Another from the same place has them 

 ii mm. and 116 mm. ; ratio, 1 : 10.50. A third specimen (No. 1431) 

 is intermediate in size. 



The dorsal spines stand mostly in three pretty regular rows, one 

 to a plate, but usually with an imperfect, more lateral row on each 

 side proximally. They are elongated, up to 6 mm., tapered, terete, 

 obtuse or subacute, nearly smooth, not fluted, surrounded basally by 

 very broad, loose wreaths of notably large, sharply unguiculate minor 

 pedicellariae. The superomarginal spines are similar, rather longer, 

 one to a plate, in a regular row, rather low down on the side. 



The inferomarginals are still larger, up to 8 mm. on the larger 

 specimen, placed two to a plate, pretty near the adambulacrals. They 

 are mostly obtuse, with the tips wider and flattened, or, in the case of 

 the lower one, often gouge-shaped. There are no peractinal spines. 



The adambulacral spines are two to a plate, close together, form- 

 ing two pretty regular close rows. They are slender, unequal; the 

 outer one is longer and larger, usually flattened and wider at the tip, 

 and commonly gouge-shaped. 



The orals are shorter, decidedly stouter, flattened, somewhat cla- 

 vate and blunt. 



The dorsal and lateral papular areas are large. In the narrow 

 lane between the inferomarginal and adambulacral spines there is a 

 row of small papular areas; peractinal plates small, flat, standing 

 edgewise, seldom visible without cleaning ; easily seen from inside. 



