A MONOGRAPH OF THE EXISTING CRINOIDS 317 



high, with a straight proximal border. All the IIBr series except for a single deformed 

 one are 2, in contrast to the condition in granulifera. There are no IIIBr series. 



There is striking agreement between the present specimen and the specimen of 

 granulifera in respect to the ornamentation of the division series and lower brachials. 

 The surface of the ossicles is beset with thick, erect, coarse, sometimes sharp and some- 

 times more blunt spines or teeth which are partially coalesced, their distribution being 

 approximately uniform without a tendency to greater development along the borders 

 of the ossicles. The distal limit of this ornamentation lies at about the tenth or twelfth 

 brachial. The surface of the following brachials is in both cases flat, and their edges are 

 thickened and slightly crenulate. 



There are 16 arms. The change in shape of the lower brachials is noteworthy. Up 

 to the third brachial on arms arising from a IIBr axillary, or fourth brachial on arms 

 arising from a IBr axillary, the articulations are transverse and the brachials therefore 

 discoidal or quadrangular; then follow about four bluntly wedge-shaped brachials with 

 diagonal articulations; then one or two rectangular brachials with transverse articula- 

 tions, which usually delimit the basal ornamentation. The brachials following are longer 

 and approximately triangular. Toward the arm tips the brachials again become shorter 

 and more bluntly wedge-shaped, and finally almost cornet-shaped with widely flaring 

 ends. Hartlaub remarked it is worthy of note that a similar condition may be seen on 

 some of the arms of the granulifera specimen, especially in the lower brachials. 



The sequence of the syzygies on two similarly preserved arms arising from a IBr 

 axillary are: Between brachials 3+4, 5 + 6, and 14+15; and on the other arm between 

 brachials 3+4 and 16+17. On arms arising from a IIBr axillary the first syzygy is 

 almost always between brachials 1+2, as in the granulifera specimen. In a few cases 

 this is followed by a syzygy between brachials 3 + 4; whether this last is present or not 

 the next syzygy is from between brachials 14 + 15 to between brachials 20 + 21, and that 

 following is from between brachials 22+23 to between brachials 28+29. A syzygy 

 between brachials 10 + 11, often present in granulifera, Hartlaub could not find in this 

 specimen. 



On arms arising from a IBr axillary P! is unfortunately preserved only as far as the 

 fourteenth segment; the first five segments, as in P D in the specimen of granulifera, are 

 broad with a spiny border. On arms arising from a IIBr axillary Pi is shorter with fewer 

 segments, about 5 mm. long with about 15 segments of which the first four are also broad- 

 ened and spiny edged. The following pinnules gradually decrease in length and in the 

 number of their component segments. From about P 4 onward the pinnules are short, 

 only 4 mm. long, with about 7 segments of which the first two are short and those fol- 

 lowing are elongated. In a few pinnules in which gonads are in process of formation, 

 the third and fourth segments are broadened. Toward the arm tips the pinnules become 

 longer again; here they are slender, about 5 mm. long, with 10 segments. 



The ambulacral plating consists of prominent side and covering plates. The sacculi 

 are rather small. The disk is 6 mm. in diameter, brown, and rather deeply incised. 



The skeleton, in alcohol, is dingy yellow brown. 



Locality. — West Indies. 



