64 



bands of red or with the free end red. Already from this colour of the spines it 

 might be supposed not to be T. Reevesii, and the examination of the specimens 

 shows them to be something quite different from that species; they belong to the 

 genus Gymnecbinus and must form a new species, which is described below as 

 Gymnechinus versicolor. Otherwise T. Reevesii is really found on Macclesfield Bank. 

 I have seen in the British Museum several specimens from that locality named T. 

 loreumaticus (not mentioned in Bei.i.'s Report), which are really T. Reevesii. 



The specimen mentioned by Bedford (Op. cit. p. 281) as Temnoplenriis Rey- 

 nuudi'} I have also examined in the British Museum; it is Salmacis dnssiimieri. Of the 

 specimens mentioned in the Challenger-Echini p. 107 as Tenmopl. Reynaiidi scarcely 

 one is really T. Reevesii. The specimen from St. 166 is very small (4'5 mm. in dia- 

 meter), without genital pores. There is a small red spot on the outer end of each 

 genital plate; a large anal plate covers the whole anal area. This may perhaps be 

 T. Reevesii, but it is not possible to say so without a very careful examination and 

 comparison with undoubted young specimens of Reevesii. To which species the 

 other specimens, from St. 192 and 219, belong I dare not say from the short exa- 

 mination of them I made during my visit in the British Museum last summer. I may 

 only remark that they have large pits, distinct down to the peristome; no ocular plate 

 reaches the periproct; the spicules are bihamate. These characters prove that the 

 specimens are not T. Reevesii. 



Only the three species of Temnopleurus mentioned here are known as yet. 

 T. japonicus v. Martens is stated by Agassiz (Rev. ofEch. p. 166) to be synonymous 

 with T. Hardwickii. — Dr. Meissner has kindly sent me the type-specimens (naked 

 tests), and, indeed, the whole material of Temnopleurus preserved in tne Berlin- 

 Museum, for examination, so I have been able to compare them with the other 

 species. As far as can be seen from the naked tests alone they are really identical 

 with T. Hardwickii. Two other specimens from Japan, determined by v. Martens 

 (1881) and Döderlein as T. japonicus, arc toreumaticus. 



Temnopleurus cavernosa Woods') is seen from the figures and the descrip- 

 tion to be a Pleurechinus, and it can even scarcely be doubted that it is PL ho- 

 Ihryoides, the only species known to grow to such a size as shown in these figures. 



The three species of Temnopleurus may be distinguished thus: 



1. Spicules biacerate (and bihamate); one ocular plate in 

 contact with the periproct. A distinct anal plate is found, 

 even in larger specimens. The pores are distant from the 

 edge of the ambulacral area. Pits very small on the 



abactinal side, almost as in Salmacis. Spines not ringed. T. Reevesii (Gray). 

 Spicules bihamate only; no ocular plate in contact 



') I. E. Teni.son-Woods. On a young specimen of a Temnopleurus. I'roc. Linn. Soc. N. S. Wales. V. 

 1880. p. 493-94. I'l. XV. Figs. 3-4. 



