Some Echinoderms of Laguna Beach 



In the summer of 1915, Prof. A. M. Bean dredged an injured specimen of heart 

 urchin. It seems to be the same as the one labeled Lovcnn coniiformis Gray, in the 

 museum of the Scripps Institution at La Jolla. 



Since 1915 we have dredged large numbers of the little urchin, Lytet hhius 

 anamesus H. L. C, Det. H. L. C. 



The sand dollar Drriiiraster exieiilrinu Esch. has been dredged every summer, 

 especially off Emerald Bay. It is also very common in places on the mud flats at 

 Balboa and Anaheim Landing. 



The starfish Ludia foliata Grub, has been obtained but once. The starfish Hen- 

 ricia hetlnsiula Fisher Det. H. L. C, whose central parts were yellow and whose arms 

 had purple tips, has been collected but once, by Mr. Grow in 1916. 



But one specimen of the basket star has been taken. It was determined for us by 

 Dr. H. L. Clark. It is Gorijonocephalus eucnemis M. & T. 



The following serpent stars have been found every summer at low tide: Opliio- 

 derma panamensis. Lutk. Det. H.L.C. is the largest species. Opliiiiplocus csinarki 

 Lyman, Det. H.L.C. Usually unicolored. Ophionereis annuiata Le Conte. Compared 

 with Fisher's determined specimens. Ophiothrix spiculata Le Conte. This variable 

 and beautiful form is found in many places, among mussel beds, in holdfasts and 

 dredged. 



Ophionyptus moculosus Clark. Det. H. L. Clark. These have been collected from 

 holdfasts. 



During the summer of 1917 a curious long-armed serpent star was collectetl. 

 It was determined for us by Dr. H. L. Clark, but as the disc fell off the determination 

 is not quite sure. "I am cataloging it as A mphiodia harhane Lyman, known only from 

 Santa Barbara. But the arms of this specimen are much longer than the typical 

 barbane, so it may be itrtiai. One must have the disc to be sure." 



We hope to collect more specimens of this another summer. The holothurians so 

 far are as follows: 



The common Stichopus i aliforriitus Stimp. ami tlie large red dredged A', jnbrisorii 

 Heel. 



Several specimens of a brown T/jynnr have been obtained. Several reil with black 

 tentacles which Dr. Clark thinks may belong to the genus Cuiumaria. Another speci- 

 men sent in 1917 to Dr. Clark, "It is apparently Cudimaria nirota Cowles." 



In 1914 a single specimen of I'snlus Sp. was obtained. 



White and [link sjiecimens Dr. Clark has determineil as I.rpittsyfiapta hilhrti'Jts 

 O.F.M. 



(('onlrihutioii jriim llif '/.(lolnijiial Drpiirlmriit nj I'nmiiiia ('nllcgr) 



