A MONOGRAPH OF THE EXISTING CRINOIDS 619 



One of the specimens from Bantayan reef, Cebu, has 40 arms which are about 

 150 mm. long. 



In 28 fully developed specimens from Port Galera, Mindoro, which were exam- 

 ined in detail, the number of arms varied from 30 to 53, averaging 41. Of these 28 

 specimens, 16 had exactly 40 arms. The length of the arms varied from 140 to 280 

 mm., averaging 193 mm. A small specimen from the same locality has 25 arms 55 

 mm. long. 



One of the specimens collected by Dr. Th. Mortensen at Port Galera, Mindoro, 

 has 40 slender and attenuated arms. Of the 10 IIBr series 6 are 4 (3+4) and 4 are 2. 

 The cirri are IX, 14-16, 9 mm. long, small, slender, and weak. A second specimen 

 has 36 arms, the greatly attenuated anterior arms reaching 150 mm. in length. The 

 10 IIBr series are all 4 (3+4). Of the 16 IIIBr series 15 are 2 and only 1 is 4 

 (3 + 4). There is a single rudimentary cirrus 5 mm. long and a few cirrus stumps. 

 In spite of the very large number of IIIBr 2 series this specimen can not represent 

 a species of Comantheria as it lacks all the other characteristics of species of that 

 genus. Another specimen has 34 slender and elongated arms. Of the 10 IIBr 

 series, 7 are 4 (3 + 4) and 3 are 2. The cirri are V, 15, from 10 to 12 mm. long, 

 slender and delicate. The fourth specimen has 29 arms of which the slender and 

 attenuated anterior are 150 mm. and the posterior are 70 mm. long. Of the 10 IIBr 

 series, 6 are 4 (3 + 4) and 4 are 2. The cirri are X, all more or less rudimentary. 



Caipenter's variety 3 of Actinometra polymorpha from Bohol was characterized 

 as follows: 



The centrodorsal is large and thick, with only 3 cirrus scars. 



The IBrj are completely united all aiound the calyx. 



The arms are 39 in number. 



The intersyzygial interval varies from 2 to 8 muscular articulations, being 

 usually 4. 



Combs occur on the pinnules of the division series and of the first 2 brachials, 

 occasionally also on the pinnules of the third, fourth, and fifth brachials. 



The color is reddish brown, the center of the dorsal surface of the skeleton from 

 the centrodorsal to near the end of the arms being marked by a faint white line with 

 dark borders. 



Carpenter said further that of the 10 IIBr series present, 8 are 4 (3 + 4) and 2 

 are 2. There are 19 IIIBr series of which 15 are 4 (3+4) and 4 are 2. Following 

 IIBr 2 series there are 2 IIIBr 2 series and 1 IIIBr 4 (3+4) series, and following 

 IIBr 4 (3+4) series there are 14 IIIBr 4 (3 + 4) series and a IIIBr 2 series. 



In this specimen the first arm syzygy is always between brachials 3+4, but the 

 position of the subsequent syzygies is subject to considerable variation. The follow- 

 ing irregular distribution of the first 3 syzygies occurs. Between brachials 3 + 4, 

 5 + 6, 11 + 12 (once); between brachials 3+4, 5 + 6, 12+13 (once); between brachials 

 3 + 4, 8 + 9, 13+14 (twice); between brachials 3 + 4, 9 + 10, 14+15 (twice); between 

 brachials 3+4, 10 + 11, 15 + 16 (seven times); between brachials 3 + 4, 11 + 12, 

 15 + 16 (four times); between brachials 3 + 4, 11 + 12, 16 + 17 (sixteen times); between 

 brachials 3+4, 11 + 12, 17+18 (once); between brachials 3 + 4, 11 + 12, 19 + 20 

 (once); between brachials 3 + 4, 12+13, 17+18 (three times). 



