112 



BULLETIN 76, UNITED STATB8 NATIONAL MUSEUM. 

 Specimens of Luidia foliolata examined— Continued. 



Station. 



4S0I. 

 4S35. 



Monterey Bay (off Hill's Land- 

 ing). CalUomia. 



.do. 



455!. 

 4S54. 

 4555. 

 4557. 



Monterey Bay (3 miles off Pyra- 

 mid Point). 



Monterey Bay (between Italian 

 ledge and shore). 



Monterey Bay (near Italian 

 ledge). 



Monterey Bay (70 Fathom Bank) 



Monterey Bay (Portuguese 



Ledge). 

 Monterey Bay (Humpback 



Rock). 

 Monterey Bay (off Soquel 



Point). 



45GI. 

 4362. 



Mazatlan, Mexico (?) . 

 San Pedro, CalUomia. 



Depth. 



12-U 

 71-54 



4(>-o4 



5(M6 



7.3-06 

 (iO-80 



53-54 



40-28 



10-12 



Nature of bottom. 



soft green mud . 



hard sand 



hard gray sand. 



coarse sand, shells, rocks. 



green mud, rocks. 



fine gray sand, rocks. 



coarse sand, shells, rocks . 

 hard sand 



^/&a/ro55,1904 (California). 



Stanford University. 

 University of CaUfornia. 



Remarks. — This is a constantly five rayed short spined species with quadrate 

 paxillic along either side of the abactinal surface of rays. It is entirely without 

 pcdiccUariiE, and is hence sharply differentiated from L. quinaria and L. limhata 

 of Japan, and appears to be more closely related to L. brevispina Liitken, of Mazatlan 

 and the Hawaiian Islands. From tliis form it may be readily distinguished by the 

 longer and more numerous inferomarginal spines, those of hreinsjnna being very 

 short and confined to the extreme margin of ray. There are only one or two of them. 

 The other armature of inferomarginal plates consists, in hrevispina, of numerous 

 broad rounded squamiform granules wliich imbricate strongly, and along border of 

 plates a row of very slender spinelets. The general appearance of the actinal surface 

 in the two species is entirely different. The paxilliB are usually convex in hrevispina, 

 and the adambulacral armature and that of mouth plates is also very different. 

 There are no pedicellaria^ in hrevispina. Compared with L. claihrata of the eastern 

 coast of the United States, foliolata is seen to have much heavier and less chaffy 

 spinelets on the inferomarginal plates, the latter being narrower and shghtly longer 

 than in ckithrata (and hrevispina). The marginal spines oi foliolata are more numer- 

 ous and heavier than those of clathrata. Both clathrata and hrevispina lack the 

 numerous minute spinelets on inner face of mouth plates. From the specimens at 

 my disposal (one hrevispina from Mazatlan and twelve clathrata from Cameron, 

 Louisiana) I would unhesitatingly place hrevispina much nearer to clathrata than to 

 foliolata. The character of the abactinal paxillse, marginal, adambulacral, and oral 

 armature is of the same general character in the first two forms, which appear to be 

 perfectly distinct, however. 



As the Ust of localities will show this species is very numerous in moderate depths 

 on a soft bottom. In Monterey Bay it is about the commonest starfish. The species 



