Verrill, Notes 0)i Bddiata. 805 



but rather to tlie genus, 2oxocid(ins of A. Agassiz, where he had 

 ah-eady placed it. 



The reasons for not adopting the name, Toxopneustes, for this group, 

 are tliese : 



1 St. "When this name was Jirst proposed " Echinus pileohis"' Avas 

 mentioned, without description or reference, as its type, (]\Ionog. Ech., 

 2'"^^ liv., p. 7). 



2nd. When next mentioned and first described^ Echinus tubercula- 

 tiis Lamarck was given as its type, and the desci'iption applies to 

 such species as are now named Toxocidaris by A. Agassiz, (?iIonog. 

 Ech., 4"'e liv., p. ix). 



3rd. In tlie work last named the typical species of Eur'}/ echinus 

 were described under Echinus proper, as restricted by the removal 

 of Tripneustes, Toxopnevstes, etc., and therefore were evidently not 

 regarded as belonging to the latter genus. 



4th. In a work jjublished five years later (C'atal. Rais.) Toxop- 

 neustes was placed as a sub-genus of Echinus, and a variety of forms 

 were referred to it, amounting to thirteen nominal species, among 

 which are several types now regarded as generically distinct. Of 

 these species the 1st, 2nd, and 4th are now placed in the genus 

 JSphcerechinus Desor; the 3rd, 5tb, 7th, and 10th belong to Euryech- 

 inus\ while the 8th {2\ Delalandii) awdi i)th [E. tuherculatus) are true 

 Toxopneustes, now referred to Toxocidaris by A. Agassiz ; the 6th, 

 11th, 12th, and 13th are donbtfid species, the last fossil. 



It is, therefore, evident that if Toxopneustes be taken in its original 

 sense, when first described, it must be restricted to that group having 

 T. tuberculatus as its type, a group apparently equivalent to Toxo- 

 cidaris A. Agassiz, which is represented by several East Indian and 

 Pacific Ocean species, as well as by two species iipon the Pacific coast 

 of N. America (jT. mexicana and T. franciscana). These species have 

 the characters originally assigned to Toxopneustes in an eminent 

 degree, while to E. pileolus, as now understood, neither the name 

 nor description would apply. Therefore there seems to be grave 

 objections against restricting it to the latter species, and its allies, 

 even were it certain that the species now known as Boletla pileolus, 

 was the one referred to as Echinus pileolus, without authority. 



Euryechinus imbecillis Verriii. 



2 Echinus gihhosus Val. MS. ; ? Echinus {Toxopneustes) gibbosus Agassiz, Catal. Rais. 

 Euryechinus gibbosus Verrill, Proc. Boston Soc. Kat. Hist., x, p. 341, 18G6. 



This species was found thrown upon the beach abundantly at Cal- 

 lao and Paita, Peru, by Mr. Bradley. At the latter locality living 



