NO. 1547. .1 NEW CRIXOID FROM THE PACIFIC— CLARK. 553 



and ag-ain near the base. The stem is smooth and very slender, all the 

 joints being- practically cylindrical; it tapers oradually from the base 

 iH)\vard, expanding again slightly near the calyx. There appears to 

 be a rather unusual amount of tlexil>ilit3' in the stem of this species, 

 especially near the calyx, for in some of the specimens it is so much 

 arched that the arms point straight down: on removing them from 

 the alcohol, the stem may be straightened out again without injur}'. 



Interradial plates are present, similar in character to those of Cala- 

 iiioo'lnus dhniicd;*'^ but much larger in proportion. 



Some of the specimens are parasitized by Euliina ptilocrinicola 

 Rartsch, which in one has resulted in a very considerable distortion 

 of the calyx. Another has three holes completely perforating the 

 plates of the calyx, evidently made l)y this species. 



BATHYCRINUS AUSTRALIS Clark, new name. 



In ISTG'* Sir C. Wyville Thomson described a new Bathycrimis 

 from a single specimen taken by the Challenger at Station No. 106, 

 August 25, 1873, in 1- 17' north latitude, 21^ 26' west longitude, 

 under the name of BatJnjcrinus oMricluanm, illustrating his de- 

 scription with a woodcut of a drawing made on board the ChaUeiujer. 

 Subsequently about a dozen other specimens of Bathycrinus were 

 obtained by the OhaUenger, which were referred by Sir Wyville to this 

 species. 



In working up the stalked crinoids of the Challenger collection. Dr. 

 P. Herbert Carpenter'' found that Sir Wyville had united two species 

 under the name of B. al</richl(/nvs, not realizing at the time that the 

 single small specimen ol)tained near the equator was specifically dis- 

 tinct from the larger examples secured in the South Temperate Zone. 



Now unfortunately Doctor Carpenter in his great work applied Sir 

 Wyville's name B. aldrlchianus to the specimens o])tained in the 

 South Temperate Zone, being led into error through Sir Wyville's 

 later writings, where he limits the name B. aldriehianus to these same 

 examples; and he gives the new specific name Bathycrinus caw.pbelli- 

 aniix (Wyville Thomson MSS.) to the single specimen obtained at 

 station No. 106, the ver}' one which eight years before served as the 

 type of B. aldriehianus. The woodcut originally used in 1876 to 

 illustrate B. aldriehianus was used again in 1878'" to illustrate the 

 same species; l)ut Doctor Carpenter in 1884 used the same woodcut to 

 represent his B, canqihellianus. It is clear, then, that the names 

 B. cddricJiianiis and B. eampbellianus are synonyms, being founded 

 on the same specimen, and also that the name B. aldriehianus used by 



o Jour. Linn. Soc. London, Zoology, XIII, p. 50, fig. j). 49. 



^Challenger Reports, Report on the Crinoidea, vol. xi of Zoology, p. 239. 



cThe Atlantic, II, p. 85, fig. 23. 



