REPORT ON THE CRINOIDEA. 



225 



A. No pinnule on the third brachial. 



I. Two post-radial axillaries ; the inner arms of each ray usually without 



a pinnule on the second brachial, .... 

 II. One post-radial axillary; the second brachial always has a pinnule, 

 R The third brachial has a pinnule. 



I. One post-radial axillary ; the rays quite free laterally. 



a. Thirty cirrus-joints ; brachials very short ; sides of rays smooth, . 

 p. Twenty cirrus-joints ; brachials not specially short ; irregular pro- 

 jections at the sides of the rays, ..... 

 II. Two or more post-radial axillaries. 



a. Second pinnule larger than third. 



1. The rays free laterally. 



a. The second pinnule stiff and styliform, of twelve to 



eighteen much elongated joints. 

 (i) Rays have marginal projections ; third pinnule not 

 greatly shorter than the second. 

 a. Forty cirri ; axillaries more than twice as long 

 as second radials, .... 

 /?. Twenty-five cirri; axillaries less than half as 

 long again as second radials, 

 (ii) Margins of rays smooth ; third pinnule considerably 

 shorter than the second, 



b. The second pinnule has twenty-five or more joints, 



which are not specially elongated, 

 (i) The lower pinnules are larger on the outer arms of 

 each distich ium than on the inner ones. 

 a. Third pinnule quite short, 



ft. Third pinnule not specially short, nearly as long 

 as the second on inner arms, 

 (ii) The lower pinnules fairly uuiform in size on all the 

 arms. 

 a. The fourth and fifth brachials bear large and 



tolerably equal pinnules, 

 /3. The pinnule on the fourth brachial larger than 

 that on the fifth. 

 Third pinnule smaller than the first ; second 



syzygy about the twentieth brachial, 

 Third pinnule equal to the first ; second syzygy 

 about the thirteenth brachial, 



2. The rays in close contact laterally. 



a. Spiny cirri. 



(i) The second pinnule not greatly larger than the 



third ; no post-palmars ; the fifth brachial has 



the first syzygy in arms which spring from a 



distichal axillary, .... 



(ii) The second pinnule considerably longer than the 



third ; post-palmars ; the first syzygy always in 



the third brachial. 



a. Over thirty cirrus-joints ; the first pinnule not 



much larger than the second. The lower 



brachials have flattened sides, * j j 



(ZOOL. CHALL. EXP. — PART hX. — 1887.) 



1. manca, n. sp. 



2. diseiformis, n. sp. 



3. clemens, n. sp. 



4. marginata, n. sp. 



5. tubereulata, n. sp. 

 spicata, Carpenter. 



indica, Smith, sp. 



protecta, Liitken, MS. 



6. conjungens, n. sp. 



xquipinna, Carpenter. 



Iwvicirra, Carpenter. 

 imparipinna, Carpenter. 



regime, Bell. 



gyges, Bell. 



Ooo 2a 



