HOLOTHUHIOIDEA OF THE INDIAN OCEAN, 173 



NOTES ON THE HOLOTHURIOIDEA OF THE 

 INDIAN OCEAN. 



Bj^ Joseph Pearson. 

 (With three Plates.) 



II.— THE SUB-GENERA ARGIODIA AND 

 ACTINOPYGA. 



TN a Paper published in this Journal* I have given reasons 

 -L for combining the genera MiXlleria and Holothuria under 

 the latter name, and I divided the old genus MiXlleria into two 

 sub-genera, for which I proposed the names Argiodin and 

 Actinopyga. 



The material upon which the following notes are based is 

 taken from the collections referred to in a previous Paper in 

 this Journal. t Of the four known species of the sub-genus 

 Argiodia, three have been recorded from the Indian Ocean, 

 and aU from the Indo-Pacific region. Argiodia flavo-castanea 

 and Auj'bodia parvula have also been recorded from the 

 Atlantic. 



Of the eight species of Actinopyga, six have been recorded 

 from the Indian Ocean, and seven from the Indo-Pacific 

 region. Only one species, Act. agassizi, has not been found 

 outside the Atlantic. 



The species dealt with in the present Paper are as follows ; — 



Sub-genus Argiodia. Pearson. 



Argiodia maculata (Brandt). 

 Argiodia flavo-castanea (Theel). 

 Argiodia parvula (Selenka). 



* Pearson : " Proposed Re-classification of tlie genera Millleria and 

 Holotliuria." — Spolia Zeylanica, Vol. IX., Part XXXV., pp. 163-172, 



1 Pearson : " Notes on the Holothurioidea of the Indian Ocean, 

 I. — The genus Holothuria." — Spolia Zeylanica, Vol. IX Part 

 XXXIV., pp. 49-101, Plates V.-XIV. 



2 A 6(10)13 



