60 MADREPOEAEIA. 



A single lobate frond, evidently fractured from a large mass, but too small to found a 

 new species, may lie placed here provisionally. The calicles closely resemble those above 

 described, the iuterseptal loculi are, however, sharply bounded peripherally and the growing 

 margin is thicker, while the lobe itself is almost flat, showing no signs of curving round 

 outwards to form a cylinder. 



h. Townsville, Great Barrier Keef. Saville-Kent Coll. 



Species 40. Turbinaria reptans. (PI. XVI. ; PL XXXII. fig. 12.) 



Description. — Corallum a flat, nodulated mass surrounded by an irregular fringe of short 

 jwotuberances or cylinders, and round the outermost edge by lobed fronds bending downwards 

 on all sides towards the substratum and rolling up to form cylinders. The single fronds are 

 small and shallow (2 to 3 cm.) and much lobed, and show here and there a marked tendency 

 to bend do\vnM-ards at their outermost margins. The growing margins are tliick ; the young 

 calicles appear as small irregular holes. 



Calicles crowded, here and there irregularly projecting, three or four rising together to form 

 a nodule. Apertures round-oval, minute, 1 mm. (the very largest reaching 2 mm.). Septa 

 If) (20 or more in larger calicles) reaching to the half-radius circle, bending round to descend 

 vertically to form the deep, regularly elliptical fossa. Columella not apparent. The iuter- 

 septal loculi pronounced, but bound irregularly round the margin by the granular ccenenchyma. 



The cojnenchyma finely granular. 



The single whole specimen which, with a fragment, is all the Collection possesses, is a 

 small complete stock. In its general method of growth it somewhat resembles the last 

 species, but there is no possibility of uniting them. The diflereuces are very pronounced. 



a. Torres Straits (West). Prof. A. C. Haddon. (Type.) 



h. Locality not recorded. [Eegister No. 93. 7. 1. 8.] 



Species 41. Turbinaria brueggemanni. (PL XV. ; PL XXXII. fig. 13.) 



Description. — Expanded cup on short, very thick stalk : margin much folded, the folds 

 generally forming cylinders or bifrontal fusions ; margin thick and wavy. 



Calicles sparse, project only with their thick margins, elliptical, regular, 2 mm. long dia- 

 meter. Septa 20 to 22, project to about the half-radius cii'cle ; thin, delicate, but with lateral 

 projections, thus continuing the finely spongy character of the ccenenchyma : bend gently over 

 to descend perpendicularly round the neat, rather deep, elliptical fossa. Columella distinct, 

 protuberant, loosely granular. Iuterseptal loculi distinct, not bounded peripherally. 



Ccenenchyma above, spongy, porous, flaky ; beneath, stony furrows much arched over, as 

 if the corallum were burrowed tlirough and through just below the surface. 



This specimen possesses characters which distinguish it from other known Turbinarians. 

 It is especially interesting as it shows the transition between the cup and the adult mesenteri- 

 form type of growth. It has the appearance common to all other specimens from Formosa, 

 but the characters of its calicles compel us to separate it from them. 



a. Formosa, Swinhoe CoU. (Type.) 



