318 



THE ECHINOJDEA^OF THE MERGUI ARCHIPELAGO. 



spines on the test ; the Urchin, when viewed from above, has in 

 consequence the appearance of being furnished with a richly- 

 variegated fringe. These spines are white, banded on the outer 

 two thirds with narrow rings of reddish purple. The other spines 

 on the test, which are small, delicate, and sharply pointed, are 

 white. The colour of the test is creamy white. The naked 

 median areas are broad and very conspicuous. 



3. Salmacis bicolor, Agassiz. 



Salraacis bicolor, Agassiz, 1841, in Valentin, Anat. Genre Echinus, 

 p. viii. 



Locality. King Island (native name Padaw) ; Jan. 1882 ; sub- 

 littoral. 



Remarks. One of the examples from King Island is somewhat 

 higher and more conical in the test than the other specimen ; and 

 both are relatively higher and more conical than examples from 

 Mauritius. In general habit and coloration the lower example 

 from King Island strikingly recalls examples from Madras. This 

 may probably be a variety. The colour of the spines is light green, 

 banded with rich reddish purple and a light pinkish purple at the 

 base, both on the abactinal and actinal surfaces. 



Order CLYPEASTKOIDA. 

 Family Laganid^, (subfamily) A. Agassiz. 

 Genus Laganum, Klein. 

 1. Lagakum depressum, Agassiz. 



Lapanum depressum (Lesson Sf Garnot, MS.), Agassiz, 1841, Monogr. 

 Scutelles, p. 1 10. 



Locality. King Island (native name Padaw) ; 25th Jan. 1882. 



Family Scutellidj, Agassiz. 



Subfamily A rachninje. 



Genua Akachnoides, Klein. 



1. ARACHNOID?:* j-j.aci nta (Linn/-), Agassiz. 

 Echinui placenta, Linnf, 1/M>, 8y$t, Nat. ed. xii. p, 1105. 

 Araclinoidei placental Agatsiz, Monogr. ScutelUs, p. 94. 



Locality. King Inland (native name Pa daw) ; Feb. 1882. 

 "Remark t. The ningle example collected by Dr. AndcrNon is 



