142 I'. (;I^sL^:^. 



I'eferred the species lo a new genus of feminine gender, lie still pre- 

 served the second name ruber with a masculine inflection. To adapt 

 the adjectival second name to the genus-name, I have thei'efore called 

 the species E. rubra. 



Clarkometra n. gen. 



In all morphological ehararactei-istics this new genus proves to 

 be a Macrophreat form and is to be included in the subfamily Perome- 

 trinoi. (Nevertheless I \\\\\ call attention to the fact that the dorsal 

 prominence on 5*— 8''' cirral is a transversely curved, even crista. 

 This reminds one of the condition in the family Colobometridce, where 

 the crista is, however, always forked or serrate.) 



Clarkometra agrees with the Central-American genus Hijpalo- 

 metra in the absence of Pj and P^. but differs from this one by a low, 

 flattened Cd, by short cirri, which are composed of a rather small 

 number of about cubical segments, and by the occurrence of 2 pairs 

 of oral pinnules. Of the other distinguishing marl<;s I ought, perhaps, 

 to mention the appearance of the cirrus-soclvcts on Cd. (The per- 

 foration for the central canal is situated in the middle of a relatively 

 large calcareous wart located in the central pai-t of the cavity in which 

 the cirrus is fixed) — A. H. Clark in a letter to me has supposed 

 that the species described below might possibly be identical vnih, or 

 nearly related to, »Antedon impinnata'» mentioned by P. H. Carpenter 

 from Mauritius (Chall. Exp. p. 206). It is possible, though not very 

 likely, that the new species might be nearly related to Carpenter's 

 species — from his very incomplete description one only learns that 

 Pa. P,, and P, are absent — that it is identical with my species I con- 

 sider to be out of the question, partly because of the statements about 

 the number of cirri and cirrals, partly on account of the geographical 

 distribution. Besides, the statements about the pinnulation rather point 

 to a young animal than to a full-grown individual. For in connection 

 with the notice of absence of P.^, P:, and P,, nothing is said about P, , 

 and one must therefore suppose that this pinnula is present. 



This new. very interesting genus I have called after A. 11. Clark, 

 who has done such very meritorious work on the systeniisation of 

 the Comatulids. 



