70 SVEN LOVÉX, ON THE ECHINOIDEA DESCRIBED BY LINN/EUS. 



apicem contiuue distincta; iuterradiorum in assiilis primis dii- 

 abus fere nuUa, in tertia — septima aucta. deinde distincta, 

 triangula, apice adorali, superius deminuta. Lateralia duplicis 

 ordinis: majuscula trianoula ad suturas interradialium, serie 

 fere continua; minora illis interposita tria — quinque, inaequalia, 

 ad suturas assularum ambulacralium primarias, prope ambitum 

 distincta, superius e vanida. 



AuEicuL^ perditffi. 



CoLOR sordide viridis, ab ambitu sursum in areis et areolis 

 mediis obscurus; maculse albas: in interradio omni singula sub- 

 apicalis sagittata, altera ad ambitum, media, major, fere qua- 

 drata; in ambulacris nonnihil supra ambitum tres, elongatae, 

 media et lateralis utrinque, pauUum superior, in zona porifera; 

 quibus omnibus respondent in basi, interjectis maculis sub- 

 sagittatis obscuris, totidem strise carneo-albse a peristomio 

 radiantes. 



The peculiar colouring described appears to be charac- 

 teristic and a leading feature for the recognition of this spe- 

 cies. A yoiing specimen, 17 mm. by 10 mm., from the Ma- 

 cassar Straits, shows verv distinctly the identical pattern, the 

 green colour of the upper area^ and the white spöts, which 

 seen from above form a slightly pentagonal figure. The Sal- 

 macis Woodsi Ramsay shows the white spöts of the interradia, 

 at the ambitus. The specimen is no doubt a deformed one^). 



Among the species of Salmacis described one alone seems 

 possibly to fall under the E. sphteroides L., the one described 

 by Louis Agassiz-) as S. rarispiua, with characters that, va- 

 riable as thcy are and mostly common to the other species, 

 almost leave it to the trivial name alone to give a clue to 

 the species intended. This may be the S. rarispina described 

 by Alex. Agassiz^;, ouiy it cannot well be that >in the in- 

 terambulacral space above the ambitus» the primary tubercles 

 form »only two continous vertical rows near to the poriferous 

 zone», and that they are similarly arranged in the ambulacra, 

 — all contrary to the general rule, and to what is seen 

 in the photographs given. With this observation, a specimen 



') Ramsay, Catalogue of the Echinodermata in the Australian Mu- 

 seum I. p. 47. t. II, fig. 1 — 3. 



') Ao. et Desoe, Cat. Rais. 1847. p. 55. 

 ') Revis. p. 475, t. VIII b, t. 4—6. 



