42 MADEEPOEARIA. 



Briiggemann. The protuberances rise sharply from the surface, gradually widening as they 

 ascend. Further, the Turhinaria lanhw of Giebel * is almost certainly a young specimen 

 of this coral. 



Again, the Turhinaria fumjiformis of Michelin and Blainville f appears to be a young 

 form of this or of the last species, as was recognised by Briiggemann. | 



Among the specimens are a few from Torres Straits, which are of unusual interest, 

 because they show the same form with the same eccentricity of the short stalk as do other 

 I luite difterent Turbinarians \y. T. ac/aricia] from the same region. The presence of these local 

 forms of growth forces us to the conclusion that the shape of the corallum must in some way 

 be dependent upon the environment, for here are different species, collected at different times, 

 from the same region developing exactly the same form of corallum. 



a. Sumatra. 



h. Habitat unknown. 



c. Habitat unknown. 



Circular or oval discs. 



d. Wednesday Island, Torres Straits, 

 c. (A fragment) Torres Straits. 



/. Wednesday Island, Torres Straits. 

 ff. Holothuria Bank, 15 fathoms. 

 k. Habitat unknown. 

 i, J. Gulf of Carpentaria. 



Young cups or discs. 



k Wednesday Island, Torres Straits. 

 I. Habitat unknown. 



m. Holothuria Bank, North- West Australia. 

 ■n. Great Barrier Eeef. 

 0. (With T. aurantiaca, Port Denison.) 

 /). Torres Straits West. 



Zoological Society. 

 [Register No. 94. 10. 2. 1.] 

 [Eegister No. 37. 5. 13. 64.] 



H.M.S. ' Challenger.' 

 H.M.S. ' Challenger.' 

 H.M.S. 'Alert.' 

 H.M.S. 'Penguin.' 

 G. B. Sowerby, Esq. 

 Saville-Kent CoU. 



H.M.S. ' Challenger.' 

 [Eegister No. 93. 7. 1. 3.] 

 H.M.S. ' Penguin.' 

 Saville-Kent Coll. 

 Saville-Kent Coll. 

 Prof. A. C. Haddon. 



Youngest specimen with anotlier, with somewhat larger calicles (see p. 40, n). 



q. (With T. pdtata, Great Barrier Eeef.) Saville-Kent Coll. 



Two much-perforated fragments from Wednesday Island, Torres Straits, collected by the 

 ' Challenger ' expedition, have been labelled by Quelch as dead portions of Turhinaria jMtula. 

 Tliey have a strong resemblance to the dead portions of the living specimen (d) gathered at tlie 

 same time. 



r. (Two worn fragments) Wednesday Island, Torres Straits. 



* Zeitschr. f. d. Gesamnit. Naturwiss., xviii. (ISGl) p. 134. 

 t Guerin's Mag. de Zool. Classe, x. (1840) pi. 1. 

 J Ann. and Mag. of Nat. Hist., xix. (1877) p. 47. 



