274 CATALOGUE OF ECHINI. 



I 



49. Strongylocentrotus globulosus A. Agassiz. 



Hakodadi, Japan ; W. J. Fisher, U. S. S. Tuecarora (3()18). 

 KeeluDg Harbor, Formosa, China ; William Stimpsou, N. Pac. Expl. Exped. 

 (2493). 



The specimen above recorded from Formosa was described by Mr. 

 A. Ag:assiz iu 1863* as Toxocidaris glohulosa, a species wLich he after- 

 wards t united with Strongylocentrotus franciscanus, of the west coast 

 of i!^orth America. Mr. Agassiz apparently had only large specimens 

 of the francisca7ins, which often bear .a close resemblance to the speci- 

 mens of globulosns, the largest of which, however, measures only about 

 2f inches in diameter. In the collection of the National Museum there 

 are now several specimens of S. franciscanus of small to medium size, 

 M hicli permit of a more exact comparison being made, and indicate that 

 considerable differences exist between these two species. In the fran- 

 ciscanus the coronal plates are broader and fewer in number, the 

 primary tubercles much larger with a much wider scrobicular circle, 

 and the poriferous zone narrower. In two specimens measuring about 

 If inches in diameter there are 12 coronal plates in the interambulacral 

 area of franciscanus, and 17 in that of globulosus. Unfortunately neither 

 the actinal nor abactinal systems are present in any of the specimens 

 of globulosus, but the differences exhibited by the remainder of the test 

 are sufficient to show that the species are probably distinct. 



50. Strongylocentrotus intermedius A. Agassiz. 



Hakodadi Bay, Japan ; Wm. Stimpson, North Pacific Exjil. Exped. (3432). 



51. Strongylocentrotus lividus Brandt. 



England ; J. Alder (2397). 



Ireland : Roundstone, County Galway; W. W. Walpole (8725); A. M. Norman, 



1884 (7019). 

 France : 



Baie de Donarnenez, Finistfere ; F. Cailliaud (8614). 



Nice; Bourkhardt (3524). 



52. Strongylocentrotus mexicanus A. Agassiz. 



Cape Saint Lucas, Lower California; J. Xantus (26.37). 



53. Strongylocentrotus nudus A. Agassiz. (?) 



Locality unknown, i)robably Japan or the Sandwich Islands (3594). 

 This single specimen was originally labeled by Mr. A. Agassiz ^^Tox- 

 ocidaris nudaff''\ and it agrees tolerably well with his description of 

 that species, although it bears some resemblance, both as regards its 

 general appearance and a few details, to certain specimens of S.fran 

 ciscanus in the Museum collection from Sitka, Alaska. The arcs of 

 pores are, however, straighter, and contain only from five to six pairs 

 of pores each ; the actinostome is also i)roportionally larger. The label 

 of locality is missing, but the specimen j^robably belonged to the col 

 lection of the North Pacific Exploring Expedition. 



*Proc. Acad. Nat. Sci. Phila. 1863, p. 356. 

 tEevisiou of the Echini, 1873, p. 442. 



