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-\d 

 (spines and pedicellariae) ; plate lxxx, figures i-i^ (pedicellariae, etc.). 



Asterias forreri de Loriol, Notes pour servir a I'etude des Echinodermes, 

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

 I, 1888. Jennings, Johns Hopkins Univ. Circular, No. 195, p. 16, 1907 

 (habits, name not used) ; Univ. Calif. Publ., Z06I., 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, i : 10.50. A third specimen (No. 143 1) 

 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. 



