Verrill, Notes on Radiata. 329 



Ophiocoma cethiops Llitk., Acapulco and southward ! 

 0. Alexandri Lym., Acapulco and southward ! 

 Ophiothrix dumosa Lym., Guayamas to San Diego. 



ASTERIOIDEA. 



Nidorellia armata Gray, Guayamas ! (Best. Soc. N. H.) 



Linckia unifascialis Gray, Acapulco and southward ! 



Heliaster sp.:=(Zr. Kuhiniji ?). Acapulco and Mazatian, Dr. Stimpson 



records H. hclianthus from Mazatian, but this is probably an erroneous 



identification. 



ECHINOIDEA. 



Diadema Mexicana A. Ag., Acapulco ! Cape St. Lucas ! 

 JSchinocidaris stellata Ag., Guayamas and southward ! 

 Lytechinus roseus Verrili, Acapulco and Panama ! 

 Tripneustes depressus A. Ag., Guayamas ! La Paz 1 

 Toxopneustes sp. (Toxocidaris mexicana A. Ag.), Acapulco. 

 Echinometra VanBrunti A. Ag., Acapulco ! and Cape St. Lucas ! 

 Stoloniclypeus rotundus A. Ag., Acapulco (A. Ag.), Panama! 

 JSncope orandisAg., Head of the Gulf of California! 

 Pygorhynchus Pacijicus Ag., Acapulco and Cape St. Lucas ! 

 (?) Moera clotho Mich., Mazatian. 

 Lovenia sp., Gulf of California ! 

 Meoma nigra Verrili, Acapulco 1 



HOLOTHUKIOIDEA, 



Stichopus Keferste'mii Selenka. Acapulco. 

 Holothuria luhrica Selenka. Acapulco. 

 Stolus ovulum Selenka. Acapulco. 



This list, which is doubtless very imperfect,* includes 23 species, of 

 which 9 are found also at Panama ; 5 are found at Cape St. Lucas ; 

 the remaining 9 are, so far as known, peculiar to this district, but 

 future researches will probably reduce the number, since the coast of 

 Mexico and Central America has been little explored. 



List of species of the West Coast of Central America and the Bay 



of Panama. 

 Ophiuroidea. 



Astrophyton Panam.ense Verrili, Panama and Zorritos, Peru ! 



Ophiuni teres Lyman, Cape St. Lucas to Panama! 



0. Panamensis Lym., Cape St, Lucas to Panama! 



0. variegata Lym., Realejo and Panama ! 



0. Daniana Venill, La Union! 



* Many additional species have recently been sent from La Paz by J. Pedersen, 

 lists of which will be found in articles 5 and 8, — Reprint. 



