A MONOGRAPH OF THE EXISTING CRINOIDS 243 



Another lO-ainied specimen has the arms 100 mm. in length. The centrodorsal 

 is rounded pentagonal, 3 mm. in diameter, very thin discoidal. The cirri are XVIII, 

 15. The terminal comb on the lower pinnules has 8-12 (usually 8-10) teeth. 



A third 10-armed specimen has the arms about 65 mm. long. The cirri are XX, 

 15-16. The terminal comb has 8-12 (usually 8-9) teeth. 



Another 10-armed individual has the cirri XXII, 13-14 (usually 14). 

 There are 7 additional 10-armed specimens from this locality. 

 A specimen with 1 1 arms has a single IIBr 2 series. Of the 2 arms arising from 

 the IIBr axillary the inner has the first syzygy between brachials 2 + 3 and the outer 

 has the first syzygy between brachials 3 + 4. On the inner arm the first brachial 

 bears a pinnule, while on the outer arm the first pinnule is on the second brachial. 



Another specimen with 1 1 arms has a single IIBr 4 (3+4) series. Of the 2 arms 

 arising from the IIBr a.\illary the inner has the first syzygj^ between brachials 2 + 3 

 and the first pinnule on the first brachial, wliile the outer has the first syzygy between 

 brachials 3 + 4 and the first pinnule is on the second brachial. 



In another specimen with 11 arms and a single IIBr 4 (3 + 4) series, both arms 

 arising from the IIBr axillary have the first syzygy between brachials 3+4 and the 

 first pinnule on the second brachial. Two other 11-armed individuals are similar to 

 this. 



In a specimen with 12 arms there are 2 IIBr 4 (3 + 4) series. The first pinnule 

 is in all cases on the second brachial. On 3 of the arms arising from the IIBr axil- 

 laries the first syzygy is between brachials 3+4, but on one of the inner arms it is 

 between brachials 10+11. 



Another example has 12 arms and 2 IIBr 4 (3 + 4) series. AH 4 of the arms 

 following the IIBr axillaries have the first pinnule on the second brachial and the 

 first syzygy between brachials 3+4. Another 12-armed specimen with 2 IIBr 4 

 (3-|-4) series is similar to this. 



In a specimen with 12 arms there are 2 IIBr 4 (3 + 4) series. Following one of 

 the IIBr axillaries, the inner arm has the first syzygy between brachials 3 + 4 and the 

 first pinnule on the second brachial, while the outer has the first S3'zygy between 

 bracliials 1+2 and the second between brachials 10+11, and the first pinnule on 

 the epizygal of the first syzygial pair (second brachial). The 2 arms following the 

 other IIBr axillary both have the first syzygy between brachials 3 + 4 and the first 

 pinnule on the second bracliial. 



A very interesting specimen with 12 arms has one IIBr 4 (3 + 4) series and one 

 IIBr 3 (2 + 3) series. Following the axillary on the IIBr 4 (3 + 4) series, the outer 

 arm has the first syzygy between bracliials 6 + 7 and the inner arm has the first syzygj' 

 between brachials 3 + 4; on both arms the first pinnule is on the second brachial. 

 Following the axillary on the IIBr 3 (2 + 3) series, the inner arm has the first syzygy 

 between brachials 2 + 3 and the first pinnule on the first brachial, while the outer arm 

 has the first syzygy between brachials 3 + 4 and the first pinnule on the second 

 brachial. 



Two specimens with 13 arms have 3 IIBr 4 (3 + 4) series. On all the arms 

 foUowTing IIBr axillaries the first syzygy is between brachials 3 + 4 and the first 

 pinnule is on the second brachial. 



