OB LTTTLE-KNOAVIv' COMATULiE. 499 



The absence of pinnules on the second and tliird brachials dis- 

 tinguishes it from this last and also from E. varians. Althouo-Ji 

 E. itidivisus is richly provided with large sacculi at the sides of 

 the brachial ambulacra, they are smaller and more scanty in E. 

 varians than in Atelecriniis or in any Anteclon I know ; while 

 they are absent altogether in E. Seinperi and in the closely allied 

 E. japonicus. These organs occur in all the other genera of 

 Comatiilce which have a central or a subcentral mouth, viz. Atele- 

 o'imcs, Antedon, and Promacliocrimis ; while they are also found 

 in nearly all the genera of Stalked Crinoids which have the 

 mouth in this position, viz. Bliizocrinus, Penfacrimis, and Bathy- 

 crimes. I have no information as to their presence or absence 

 in llycrinus, but I have failed to find them in Holopiis. 



Eiidiocrinus Semperi, like other Comatulce, exhibits a certain 

 amount of local variation. All three specimens were obtained in 

 a very mutilated condition, hardly any thing remaining of one of 

 them but the calyx and the bases of three arms. But sufficient 

 remains of the other two to indicate a considerable amount of 

 flexibility in some of their characters. That from the lesser 

 depth (Station 169) is the larger of the two, and its disk bears 

 larger and more numerous plates ; while there are fewer cirri on 

 the centrodorsal, and the pinnule-joints are somewhat shorter and 

 less glassy than those of the individual from Station 164. In 

 the former also, both the antero -lateral rays have the first pinnule 

 on the left side ; while in the latter this is only the case in the 

 right anterior ray. 



4. EuDioCEiis'US JAPOJficus, n. sp. 



Centrodorsal relatively large, conical, and covered except at 

 the dorsal pole by 40-50 cirrus-sockets, with a well-marked arti- 

 cular rim around the opening of the central canal. Cirri more 

 than 35 mm. long, tapering, and consisting of 27-f- joints; the 

 first three are quite short, the fourth a good deal longer than 

 wide, and the next four the longest, but scarcely reaching 2 mm. ; 

 the following ones diminish slowly in size, but exhibit no traces 

 of any dorsal spine. 



Eadials just visible. First brachials trapezoidal, the proximal 

 edge being wider than the distal one, where the union with the 

 second brachial is by a ligamentous articulation. The proximal 

 faces are produced into large muscle-plates for articulation with 

 the radials. The second brachials, as seen from below, are also 

 trapezoidal, being narrower along their proximal edges. The 



