On neio Crinoids from the Dutch East Indies. 81 



liiiid tibire the liair is red apically ; hind basitarsi with hair 

 black on outer side and behind, on inner side and the broad 

 apical brush red, in front of basal part broadly white ; fifth 

 dorsal abdominal segment with a large eream-coloured spot 

 on each side. 



Hab. Quirigua, Guatemala [W. P. Cockerell). One of 

 each sex. 



Related to T. bunchosice, Friese, but in the female the 

 third central segment is like the second (not opaque and 

 strongly punctured), while in the male the clypeus has less 

 pale colour, and there are other differences. There are 

 several more or less related species in South America, none 

 having the same structure in detail as T. mayarum. 



T. bombitarsis, Vachal, must belong to this group, and, if 

 so, is not allied to T. maura, as Vachal states. The groups 

 containing maura and bunchosice differ in the spurs and other- 

 wise, and are only superficially similar. 



Named after the Mayas, who built temples and made 

 remarkable sculptured monuments at Quirigua. The male 

 is the type. 



At flowers of Pontederia cordata, L., at Quirigua, Feb. 11, 

 1912, Mrs. Cockerell took females of Tetrapedia calcarata, 

 Cress., and T. nicest a, Cress. 



III. — Preliminary Descriptions of Eleven neio Crinoids 

 belonging to the Families Himerometridaj, Mariametrida?, 

 ojid Colobometridse, discovered hy the ' Siboga ' in the 

 Dutch East Indies. By Austin H. Claek. 



The new unstalked crinoids described below will be con- 

 sidered in greater detail and figured in the memoir covering 

 the comatulids in the ' Siboga ' reports ; as the very extensive 

 collection brought back by the ' {Siboga ' will require a large 

 amount of study, especially as regards the data bearing on 

 the geographical distribution of these animals and on allied 

 problems, it has seemed advisable to publish descriptions of 

 the new forms discovered in advance of the final report. 



Family Himerometridae. 



Amphimetra propinqua, sp. n. 



This species is most closely related to A. producta, but it 

 differs from that form in its longer and more slender cirri, 

 which are composed of much longer segments. 



