PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 71 



While at the Museum of Comparative Zoology at Cambridge, Massachusetts in, 

 the summer of 1908, Mr. Samuel Henshaw most kindly permitted me to look over the 

 letters sent to Prof. Louis Agassiz by Capt. Nicholas Pike at the time when he was 

 United States consul at Mauritius. In one of these letters Captain Pike in his usual 

 charming style described a little crinoid which he found on the reef near Port Louis 

 about the year 1867, but which broke all to pieces so that he was unable to preserve it. 

 However he made a color sketch of it and this I was able to recognize as representing 

 a species near D. nana. 



In a review of Chadwick's paper on Mr. Cyril Grassland's Red Sea crinoids 

 published in 1909, I mentioned the occurrence of a species of the D. nana group at 

 Mauritius, and when Professor Mobius' collection of crinoids from that island was 

 sent me through the kindness of the Berlin Museum I found in it a number of specimens 

 of this species; these served as the basis of my description of Iridometra matiritiana 

 published in 1911. With these specimens from Mauritius I recorded another from 

 Madagascar which had been collected by M. Grandidier in 1905 and which I had found 

 in the Paris Museum; this was again mentioned in the following year. 



In my account of the crinoids of the Berlin Museum published in 1912 Professor 

 Mobius' specimens were again mentioned, and a comparison was given between this 

 species and D. nana. 



In 1917 this species was removed from the genus Iridometra and placed in 

 Dorometra. 



DOROMETRA ANDROMACHA A. II. Clark 



Dorometra andromacha A. H. CLARK, Temminckia, vol. 1, 1936, p. 295 (listed), pp. 316-317 (descrip- 

 tion; locality Celebes). 



Diagnosis. The third to fifth cirrus segments are the longest, being about three 

 times as long as their median width. PI is 10 mm. long with 13 segments; P 2 is 3.5 mm. 

 long, with 10 segments and P 3 has 20 segments. [NoxE BY A.M.C.] The length of the 

 first pinnule is surprising and comment would be expected if it really is 10 mm. long. 



Description. The cirri are about XL, 12-14, 10 mm. long. The longest segments, 

 the third to fifth, are about three times as long as the median width, with the distal 

 ends moderately flaring. The antepenultimate segment is about one third again as 

 long as broad. 



The arms are about 40 mm. long. 



P! is 10 mm. long with 13 segments. P 2 is 3.5 mm. long with 10 segments. P 3 

 has 20 segments. 



The color in alcohol is black. 



Locality. Willebrord Snellius; Lembeh Strait, Celebes; September 25, 1930 [A. 

 H. Clark, 1936] (1 broken specimen, Leyden M.). 



DOROMETRA NANA (Harllaub) 



FIGURE 3,d 

 [See also vol. 1, pt. 2, figs. 574-575 (p. 298), 751 (p. 349)] 



Antedon nana HARTLADB, Nachr. Ges. Gottingen, May 1890, pp. 108, 170 (description; Amboina; 

 Tonga Is.); Nova Acta Acad. German., vol. 58, No. 1, 1891, p. 89 (more detailed description and 

 comparisons), pi. 5, figs. 57, 58; Bull. Mus. Comp. Zool., vol. 27, No. 4, 1895, p. 143 (range). 



