59 



This very well known species has been excellently described by Agassiz and 

 DÖDERLEIN. Only the pedicellariæ and spicules need yet be mentioned, the descrip- 

 tion of the pedicellariæ given by Duncan l)eing far too inaccurate, as pointed out 

 above. The globiferous pedicellariæ (PI. VI. P^ig. 8, 14) have one little, but distinct 

 lateral tooth on each side of the rather elongate blade, which is closed, with the 

 exception of a small elongate opening just below the lateral teeth; sometimes, how- 

 ever, one of the lateral teeth may be wanting, or the one may be placed farther down 

 than the other. The outer corners of the basal part are somewhat produced. The tri- 

 denlale pedicellariæ (PI. VI. Fig. 49, PI. VII, Fig. 3) have long and narrow valves, a 

 little curved, wide apart, joining only at the point. The edge is a little serrate or 

 sometimes quite smooth, except at the point, which has a few larger serrations. No 

 meshwork in the blade; the apophysis has some coarse serrations in the edge. 

 They are mostly small, but may reach a size of 1 mm. (head). In the ophicepha- 

 lous pedicellariæ (PI. VI. Fig. 22) the valves are rather elongate, otherwise they do 

 not present marked features, and the same holds good for the triphyllous ones. 

 (PI. VII. Fig. 28). — The spicules are bihamate and very few in number. In the 

 buccal membrane there are some irregular plates inside the buccal plates; outside 

 these the membrane is almost bare, only with a few plates opposite to the gills; 

 very few bihamate spicules occur in the buccal membrane. In the walls of the 

 intestine and genital organs there are some few bihamate spicules, only now and 

 then a spot may be found, where the spicules are more crowded. 



Several specimens were taken in the fishing-nets of the natives at Koh Kong, 

 (4 — 5 fathoms); also some small specimens were taken at Koh Kahdat, 10 faths., 

 between Koh Rin and Cliff Rock, 15 faths., and N.W. of Koh si Chang, c. lU faths. 

 By the Skeat-Expedition it was taken at Pulo Bidang (1 specimen). 



Quite small specimens (c. 5— 6 mm. in diameter) are not easily distinguished 

 from equally sized specimens of Salmacis sphœroides, the pits of the test being as 

 yet rather alike in size. However, the spines are proportionally much longer in 

 T. toreumaticus (almost as long as the diameter of the test in toreiimaticus, scarcely 

 half that length in S. sphæroides). The colour of the spines is a little different, 

 more greenish in toreumaticus , reddish or whitish in sphæroides (both are ringed); 

 the pedicellariæ present only quite insignificant differences. 



Temnopleurus Reynaudi L. Agass. is, as might already be supposed from the 

 original diagnosis (Cat. rais. p. 56), synonymous with T. toreumaticus. Dr. Gravier 

 has most kindly sent me the type-specimens for examination, so that I am able 

 to say this with full certainty. What Agassiz describes under the name of T. 

 Reynaudi in „Rev. of. Ech." is not this species but Temnopl. Reeuesii (Gray). 

 (See below.) 



Temnopleurus granulosus (Gray) is made synonymous with T. Reevesii („T. 

 Reynaudi") by Agassiz (Rev. of Ech. p. 166). Bell (Op. cit).) maintains it as a 

 distinct species. After having examined the type-specimens of Gray in the British 



8* 



