508 MR. p. H. CAEPENTER ON NEW 



and closely united laterally ; the second longer and sharply wedge- 

 shaped. Third (syzygy) aiid five or six following joints short and 

 oblong. The next ones triangular, more than twice as wide as 

 long and overlapping ; gradually becoming smoother and more 

 oblong in the middle and outer parts of the arms. 



Pirst syzygy oji third brachial ; the next on 12 or 13, then an 

 interval of 7-10 joints between successive syzygia. 



Pinnules variable. The distichal pinnule seems to have been 

 less stout than that on the second brachial. The third brachial 

 bears a small pinnule, usually less than half the length of that on 

 the fifth joint. On the outer arms of the rays the fourth, fifth, 

 and sixth joints bear large pinnules like that on the second ; 

 sometimes the fourth, and sometimes the sixth, bears the larger 

 one. The next pair, on the seventh and eighth joints, are smaller 

 again. On the inner arms the fourth joint, like the third, bears a 

 small pinnule ; and the next two pairs are large, the second pair 

 (on 7th & 8th br.) being the larger. Sometimes, however, the only 

 two really large pinnules are those of the sixth and seventh joints, 

 the previous pair being smaller, but not specially so, like the 

 pinnule on the third joint. These long lower pinnules consist of 

 about 25 stout joints, the distal ends of which have forward pro- 

 jecting lateral processes. In the large lower joints tliese are 

 chiefly limited to the outer side, but they appear on both sides 

 in the later joints. Similar, but less marked, processes are visible 

 on the cylindrical joints of the remaining pinnules, which increase 

 again in size after the fifth pair, but never become as long as the 

 large lower pinnules. 



The colour of the skeleton seeras to have been white, and the 

 perisome purplish. 



One broken specimen from the neighbourhood of Borneo. 



Bemarks. — The foregoing description is based upon some dried 

 fragments of a moderately large Anteclon which appears to be new. 

 Besides tlie three other species belonging to the Savignyii group 

 which are described in this communication, I am acquainted with 

 about a dozen more, nearly all of them from the Eastern Seas. 

 But I have been unable to identify any of them with the form 

 under consideration, which is peculiar in the crenulation of its 

 first radials, the shortness of its arm-joints, and the form of the 

 spines on the cirri and pinnules. It is altogether a larger species 

 than Ant. variipinna, from which it is readily distinguished by 

 its ctenulated first radials, tubercular arm-bases, and smoother 



