63 



tooth, that on the straight side farther down than that on the side with the terminal 

 widening. The outer corners of the basal part are broadly rounded (PI. VI. Figs. 3, 

 10). Tridentate pedicellariæ I have not found; the ophicephalous pedicellariæ are 

 like those of toreumaticus, only less elongate and with less developed meshwork; 

 the sinuations of the edge are rather deep (PI. VI. Fig. 12). The triphyllous pedi- 

 cellariæ do not present any peculiarities. The spicules (PI. VII. Fig. 37) are very 

 characteristic and unique among the Temnopleurids; they are biacerate, bowshaped, 

 without branches. They occur in the head of the globiferous pedicellariæ, in the 

 tubefeel, buccal membrane and gills. Common bihamate spicules may occur more 

 or less numerously among the biacerate ones. Very few, bihamate, spicules are 

 found in the walls of the intestine and genital organs. 



The buccal membrane has rather few plates inside and none outside the 

 buccal plates; the latter are placed one a little outside the other (in toreumaticus and 

 Hardivickii they are placed at the same distance from the mouth). The spines are 

 a little more coarsely spinous than in the two other species; this, however, is a 

 very unimportant difference. Upon the whole the spines of the Tenmopleurus-spec'ies 

 are very smoolli. It may also be remarked that the actinal primary spines are 

 curved, in all three species. 



This species was not taken by myself or by the „Skeaf'-Expedition, but 

 two specimens from the Gulf of Siam (Salmin) are preserved in the Museum of 

 Copenhagen. 



Agassiz makes T. Reeuesii Gray synonymous with T. Reynaudi L. Agass., and 

 all the later authors follow him therein. As staled above (p. 59) this is wrong. 

 As I had not remarked all the essential characters of the type-specimens of T. Rey- 

 naudi during my visit last summer in Paris, having not yet at that time studied 

 the Temnopleurids more profoundly, I asked Dr. Gravier to send me, if possible, 

 the specimens for a more close examination. With the greatest liberality, for 

 which I beg him to take my best thanks. Dr. Gravier sent me the specimens (those 

 from Ceylon (Reynaud); those from Malacca (Eydoux et Souleyet) cited in the „Cata- 

 logue raisonné" p. 56 are no longer in the Paris Museum). I could thus directly 

 compare them with the other species of Temnopleurus, and the result is that they 

 prove to be identical with toreumaticus, as might, indeed, have been supposed from 

 the diagnosis given in „Cat. rais." — The species described by A. Agassiz (Rev. of 

 Ech.) is therefore not T. Reynaudi, but it completely agrees with T. Reevesii Gray, 

 the type-specimens of which (two naked tests) present the characters pointed out by 

 Agassiz as distinctive of „ T. Reynaudi'' : one ocular plate reaching the periproct, 

 the pores placed at some distance from the edge of the ambulacral area etc. — 

 The name T. Reevesii must then be revived for this species, and the name T. Rey- 

 naudi must be dropped as a synonym of T. toreumaticus. 



In his paper „On the Echinoderms of Macclesfield Rank" Prof. Rell men- 

 tions two specimens of „T. Reynaudi' with rather long, creamy white spines, with 



