A MONOGRAPH OF THE EXISTING CRINOIDS 31 



it recalls the metacarpal III of a horse; the 58 septa run over these faces. On the 

 distal end of the first brachial there are 42 septa, 34 dorsally and 8 ventrally directed; 

 15 are complete. In another case there are 43 septa, of which 4 are rows of tubercles. 

 On the distal end of the third brachial in two cases there are 39 and 40 septa. On 

 the eighth brachial there are 42 septa, on the fifteenth 43, on the twentieth 44, of 

 which 10 are complete. The areola is narrower than in the preceding species. The 

 septa are distinct, but broad and rather low. 



Comantheria delicata grandis. — In a specimen with the arms about 110 mm. 

 long the third brachial has 34 septa, with 6 ventral rows of tubercles, the degree of 

 strength being 3. In another case there are 37 septa. The areola is broad, but low 

 and rather indistinct. 



Comaster serrata. — In a specimen with the arms about 60 mm. long the articula- 

 tion in the IBr series is a pseudosyzygy; the areola is rather broad with 5 finished 

 tubercular septa and in addition two concentric rings of tubercles; the degree of 

 strength is 3. The distal face of the third brachial has 19 septa, broad and low, of 

 which 10 are complete. The areola is narrow. 



Comantheria grandicalyx. — In a specimen with the arms about 120 mm. long 

 the IVBr 3 has about 31 septa with the strength 4. All the septa are incomplete, 

 not reaching the stout areola. Between the areola and the inner ends of the septa 

 there is a ring of 8 or 9 tubercles. There is a stout ventral beam and also a similar 

 short finished one. A third brachial on the outer side of a division series has 31 

 incomplete septa, and an inner ring of 11 tubercles, with a distinct synapticle ring 

 dorsally. The ventral beam is rather indistinct; the areola is stout. In another 

 third brachial on the outer side of a division series there are 29 septa, three of them 

 complete. The ring of tubercles is developed on one side only, and includes 6 tubercles. 

 The ventral beam is stout and lobed. Hypozygals from the distal parts of the arm 

 have 15-17 septa, all incomplete, with the degree of strength 3. The areola is narrow 

 and insignificant. 



Comanthus japonica. — In a specimen with the arms about 110 mm. long the 

 IIBr 3 has about 44 septa; of these 21 are complete, most of them finished, 18 are 

 incomplete, and there are 5 ventral rows of tubercles. The degree of strength is 4. 

 The areola is stout, well marked, and rather broad. The twenty-sixth brachial 

 (fourth brachial hypozygal) has 35 septa of which 11 are complete. The areola is 



rather narrow. 



Zygometridae 



Catoptometra rubroflava — In a specimen with arms about 100 mm. long the 

 distal end of the IBr, has 28 septa, of which 8 are complete; these are broad and 

 rather low, with the strength 3 (—4) ; the areola is of medium width. The distal end 

 of the third brachial has in one case 25 septa, and in another 23. The ninth brachial 

 has 24 septa. 



Zygometra microdiscus elegans. — In a specimen with the arms 105 mm. long the 

 distal end of the IVBr 3 has 30 septa, about 13 complete, with the degree of strength 3; 

 the areola is absent. 



