BARBADOS-ANTIGUA REPORTS 113 



Station 6. May 15, 1918. North of Insane Asylum off spring 

 garden or freshwater bathing place, 100 fms. Rough 

 bottom. 1 specimen. 



LYTECHINUS VARIEGATUS 



Cidaris variegata Leske, 1778. Add. ad Klein, p. 85. 

 Lytechinus variegatus A. Agassiz, 1863. Bull. M. C. Z., 1, p. 24. 

 Toxopneustes variegatus A. Agassiz, 1872. Rev. Ech., pt. 1, p. 

 298 ; pi. IVa, figs. 5, 6. 



In the Narrative of the expedition, Professor Nutting refers to 

 the occurrence of this well-known species at several places in 

 Antigua but does not speak of finding it at Barbados. Yet the 

 only two specimens in the collection bear the label "Barbados". 

 They are of about equal size (78 mm. in diameter with primary 

 spines 13-15 mm. long) but differ strikinglj^ in color and were 

 evidently selected as examples of the extremes in coloration. 

 One has the test pale brownish-white with only traces of green ; 

 the tubefeet are very pale brown ; the pedicellariae, muscles and 

 small spines are whitish; the peristome, heavily plated, is pale 

 brownish with traces of green; the primary spines are light 

 green, whitish at base, dark at tip ; many have one or two faint 

 dusky bands close to the tip ; of many, the tips are regenerating. 

 The other specimen has the test dull light green and whitish; 

 the tubefeet are pale brown ; the pedicellariae, muscles and mili- 

 ary spines are white or whitish ; the heavily plated peristome is 

 dull greenish ; the primary spines are deep, dark green, the tips 

 becoming purplish but not markedly so; the secondary spines 

 are pale yellow-green. In the Narrative (p. 189), Professor 

 Nutting makes the interesting suggestion that the habit which 

 both this species and Tripneustes esculentus have, of holding 

 bits of sea-weed and other rubbish all over the dorsal surface, 

 may be for the purpose of protection from the sun. It would be 

 easy to ascertain whether this is the case and the habits of these 

 sea-urchins would well repay careful investigation. 



TRIPNEUSTES ESCULENTUS 



Cidaris esculenta Leske, 1778. Add. ad Klein, p. XVII. 

 Eippono'e escuUnta A. Agassiz, 1872. Rev. Ech., pt. 1, pp. 135, 

 301 ; pi. VIo, figs. 1-3. 



