182 SPOLIA ZEYLANICA. 



lineolata, though correct, has not been used since 1835, and, 

 therefore, on the grounds of convenience, I propose retaining 

 the name miliar is. With reference to the relationship 

 between Actinopyga miliaris and Actinopyga lecanora, see my 

 remarks under the latter species. 



General Distribution. — Indian Ocean, East Indies. 



Actinopyga lecanora (Jager). 



(PI. XXIX., fig. 9.) 



Mulleria lecanora, Jager 1833 (7) ; Selenka 1867 (22) ; 

 Semper 1868 (23) ; Ludwig 1881 (13), 1882 (14), 

 1887 (15) ; Lampert 1885 (10) ; Theel 1886 (26) ; 

 Sluiter 1887 (24), 1901 (25) ; Vaney 1905 (27) ; 

 Koehler & Vaney 1908 (9) ; Pearson 1910 (19). 



Holothuria dubia (sub-genus Microthele), Brandt 1835 (4). 



Actinopyga lecanora, Bedford 1899 (2). 



External Characters. — This species attains a length of 

 upwards of 200 mm. It is chocolate -brown above with light 

 yellow mottlings and is light yellow below. There is a hght 

 area around the anus. The dorsal papillae are scattered, and 

 are smaller than the ventral pedicels. The latter show a 

 distinct arrangement into three broad rows, although there 

 are pedicels scattered on the interambulacra. There are 

 twenty dark tentacles. 



Internal Structure. — The calcareous ring is similar in 

 general appearance to the common type of the sub-genus. 

 There is a single PoHan vesicle and a single stone canal on the 

 right side of the dorsal mesentery. 



Spicules. — These are similar to the deposits of Actinopyga 

 miliaris in both shape and size, but differ in being arranged 

 in groups. 



Remarks. — ^There appears to be very little difference 

 between this species and Actinopyga miliaris. The only two 

 points of difference are in the colour and the deposits. A. 

 miliaris has a uniformly-coloured body, generally a dark 



