72 



MADEEPORARIA. 



In this specimen (94. 3. 9. 2.) many of the fronds divide up into flat (or even round) finger- 

 shaped processes. 



n. Shark's Bay. 



Small specimens and fragments. 



0. Shark's Bay (with T. magna). 

 ? p. North-East Australia. 

 q. ? 



r. Shark's Bay (two fronds growing from 

 a dead perforated fragment). 



Saville-Kent Coll. 94. 3. 9. 23. 



Saville-Kent Coll. 94. 3. 9. 12. 

 H.M.S. ' Alert.' 93. 7. 1. 9. 

 ? 93. 7. 1. 12 ? 



Saville-Kent Coll. 9.5. 8. 29. 13. 



Young specimens (possibly) of T. cons]ncua. 



Turhinaria crater (partim), Quelch, Chal, Rep. Cor., 1886, p. 166. 

 Turhinaria cinerascens, Quelch, ChaL Rep. Cor., 1886, p. 167. 



Young cups ranging from 2 to 6 cm. in diameter, and which have received many different 

 names, T. crater, T. cinerascens, &c., hy previous workers. They are in reality too young to 

 classify, but appear, at least in many instances, to be the early stages of T. conspicua. Some 

 of them already show the bifrons type of folding, and further, the type of the calicles appears 

 to connect them \vith T. consjnc^ta (or perhaps with T. magna, see above). As above stated, 

 the calicles in these young specimens are remarkable for the large oval fosste and conspicuous 

 columella ; the funnel-sliaped fossa of many older stocks may be an adaptation to growth under 

 diflerent conditions, viz. on the sides of erect fronds. 



a. 

 b-d. 

 e-h. 

 i-m. 



n. 



0. 



V- 



Locality not recorded. 

 Somerset Shore, Cape York. 



Great Barrier Reef 



Thursday Island, Great Barrier Reef. 

 BeUona Reef (5 fathoms). 



Very small specimens showing bifrontal folds. 

 q-s. Great Barrier Reef. 

 t. Port MoUe, Queensland (5 fathoms). 



u. Locality not recorded. 



[Register No. 82. 4. 18. 3.] 

 H.M.S. ' Challenger." 



Sa\-me-Kent Coll. 



Saville-Kent Coll. 

 F. M. Rayner, Esq. 



Saville-Kent Coll. 

 H.M.S. ' Alert.' 



Species 55. Turhinaria gracilis. (PI. XXIII. ; PI. XXXIIT. fig. 3.) 



Description. — Corallum develops as in T. conspicua. The fronds are deep, tliin, and 

 straight. They sometimes give rise to secondary fronds, the line of intersection of their 

 planes being in the direction of their growth. The suture along the edge is marked by a 

 median ridge, which may have a triangular depression in the line of intersection of two 

 fronds. 



