A MONOGRAPH OF THE EXISTING CRINOIDS 153 



But Koehler and Vaney found that the only comatulid dredged at this locality 

 (Talisman station 156, 1,480 meters, August 30, 1883) was a single specimen of Cro- 

 talometra porrecta and the figure certainly suggests this species much more than it 

 does Neocomatella europaea. 



Carpenter gave only a very meager account of this form, which he intended to 

 describe in detail in connection with his report on the Blake collections; but he pub- 

 lished an excellent figure of the Porcupine specimen which he had recorded in 1884. 



In 1895 and again in 1896 Prof. Ren6 Koehler recorded this type from six Caudan 

 stations in the Bay of Biscay and published notes upon his specimens, and in 1910 he, 

 in collaboration with Prof. Clement Vaney, listed the localities at which it had been 

 secured by the Travailleur and by the Talisman. 



In 1910 the present author examined at the British Museum the original Porcu- 

 pine specimen recorded in 1884 by Carpenter, which seemed to him to differ so much 

 from the West Indian type with which he was familiar through his study of the 

 Albatross collections as to merit the status of a distinct species. In his memoir on 

 the crinoids of the coasts of Africa, published in 1911, he therefore listed the African 

 localities from which this form is known under the heading " Necocomatella (new 

 species)" in the hope that Professors Koehler and Vaney in their final report upon 

 the Travailleur and Talisman collections would give it a name. 



In his notes upon the recent crinoids in the collection of the British Museum 

 the original Porcupine specimen is included under the name of Neocomatella europaea, 

 and its essential features are briefly mentioned. 



The only further reference to this form is by W. de Morgan, who in 1913 added 

 two localities to its known range as a result of the dredging operations of the Huxley. 



Genus PALAEOCOMATELLA A. H. Clark 



Actinomelra (part) P. H. CARPENTER, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, p. 93, and 

 following authors. 



Palaeocomalella A. H. CLARK, Proc. Biol. Soc. Washington, vol. 25, 1912, p. 18 (diagnosis; genotype 

 Actinomelra difficilis P. H. Carpenter, 1888); American Naturalist, vol. 49, 1915, p. 525 (bathy- 

 metrical range); p. 539 (asymmetrical disk); Unstalked Crinoids of the Siboga Exped., 1918, 

 p. 3 (in key); p. 7 (diagnosis; genotype). GISLEN, Zool. Bidrag fran Uppsala, vol. 9, 1924, 

 p. 38 (brachial homologies). 



Diagnosis. A genus of Capillasterinae in which the arms are more than 10 in 

 number, all of the division series are 2, the first pinnule of the undivided arms is on 

 the second brachial, there is always a syzygy between brachials 3 + 4 on the outer 

 and between brachials 1 + 2 on the inner arms, and the first 4 brachials are usually 

 grouped in 2 syzygial pairs; the brachials beyond the basal are triangular and about 

 as long as broad; and the centrodorsal is large with the cirri arranged in 25 closely 

 crowded and irregular columns of usually 2 each. 



Geographical range. From the Kei to the Philippine Islands. 



Bathymetrical range. From 256 to 275 meters. 



Remarks. This genus is known only from a single species represented by 2 

 mutilated individuals. It seems to differ from Neocomatella only in the large centro- 

 dorsal upon which the cirrus sockets are arranged in more or less evident columns. 

 Carpenter referred the Challenger specimen to Actinometra (Neocomatella) pulchella. 

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