A MONOGRAPH OF THE EXISTING CRINOIDS 101 



Remarks. The species of the genus Koehlermetra are very robust, indeed the most 

 robust of all the species of Thalassometridae. In this respect they are parallel to the 

 species of Crinometra and Crossometra in the family Charitometridae, in which family 

 Pachylometra in a general way corresponds to Crotalometra. 



The two species of Koehlermetra seem not to differ except in the number of cirrus 

 segments, and Hartlaub has suggested that they may represent varieties of the same 

 specific type. I have examined all the known specimens of both species, but un- 

 fortunately did not have time to study them in detail. 



KEY TO THE SPECIES IN THE GENUS KOEHLERMETRA 



a 1 . Cirri with 40-50 segments, 55 mm. long; 20+ arms 150 mm. long (Ascension Island to the Bay 

 of Biscay; 768-1,420 meters).. porrecta (p. 101) 



a 5 . Cirri with about 30 segments; 20 arms (northern part of the Bay of Biscay to the Canary Islands; 

 753-1,410 meters) flava (p. 105) 



KOEHLERMETRA PORRECTA (P. H. Carpenter) 



[See vol. 1, pt. 2, pi. 34, figs. 1207-1209.] 



Comalidc PARFAIT, Rapport sur la campagne scientifiquc du Talisman vn 18S3, 1884, p. 57 (4559' N., 

 629' W.; 1,480 meters). FILHOL, La Nature, vol. 12, 1884, p. 329 (the figure of a multibrachiate 

 comatulid from off Rochefort, 1,500 meters); La vie au fond des mers, 1885, plate between pp. 

 10-11 (same). DE FOLIN, Sous les mers, 1887, p. 335 (Gulf of Gascony, 1,480 meters). A. H. 

 CLARK, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 48. 



Antedon sp. P. H. CARPENTER, Philos. Trans. Roy. Soc., vol. 174, 1883, 1884, p. 921 (pentacrinoid from 

 near Ascension [Challenger station 344]; characters; comparison with Thaumatocrinus) , pi. 71, 

 fig. C; Bijdr. Dierk., Aft. 14, 1887, p. 48 (3 pentacrinoids from Ascension; comparison with the 

 Varna pentacrinoids). 



Antedon porrecta P. H. CARPENTER, Challenger Reports, Zoology, vol. 26, pt. 60, 1888, p. 250 (descrip- 

 tion; Challenger station 344), pi. 52, figs. 3-5; Journ. Linn. Soc. (Zool.), vol. 24, 1891, p. 66 

 (comparison with [Stiremetra] lusitanica). KOEHLER, Rev. Biol. Nord France, vol. 7, 1895, p. 475 

 (compared with Antedon flava, sp. nov.) ; Ann. Univ. Lyon, vol. 2G, Resultats scientifique de la 

 campagne du Caudan, June 1896, p. 97 (compared with/Zawa). HAMANN, Bronn's Klassen und 

 Ordungen des Tier-Reichs, vol. 2, Abt. 3, 1907, p. 1582 (listed). A. H. CLARK, Proc. Biol. Soc. 

 Washington, vol. 21, 1908, p. 126 (belongs to the genus Thalassometra) ; Proc. U. S. Nat. Mus., 

 vol. 34, 1908, p. 225 (referred to Thalassomelra) ; Proc. Biol. Soc. Washington, vol. 22, 1909, p. 18 

 (not placed in the revision of the Thalassomotridae). HARTLATJB, Mem. Mus. Comp. Zool., 

 vol. 27, No. 4, 1912, p. 285 (in the Granulifera group; doubtless different from granulifera) , p. 286 

 (referred by Clark to the Thalassometrinac) . MORTENSEN, Handbook of the echinoderms of 

 the British Isles, 1927, p. 25. 



Anledon mullispina (part) P. H. CARPENTER, Challenger Reports, Zool., vol. 26, pt. 60, 1888, p. 118, 

 last paragraph (3 pentacrinoids from station 344), pi. 14, figs. 5-7. KIRK, Proc. U. S. Nat. Mus., 

 vol. 41, 1911, p. 75, footnote (quoting [incorrectly] A. H. Clark), pi. 7, figs. 8-10 (from Car- 

 penter). 



Actinometra pulchella (part) P. H. CARPENTER, Challenger Reports, Zool., vol. 26, part 60, 1888, pp. 

 305, 306 (Talisman record; off Rochefort, 1,500 meters; reference to Filhol's figure). 



Actinomelra, sp. W. MARSHALL, Die Tiefsee u. ihr Leben, 1888, pi. 4; figure of a multibrachiate comat- 

 ulid (from Filhol, with identification by Carpenter). 



Thalassometra porrecta A. H. CLARK, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 126 (Antedon 

 porrecta should be assigned to Thalassometra) ; Proc. U. S. Nat. Mus., vol. 34, 1908, p. 225 (same); 

 Amer. Nat., vol. 42, 1908, No. 500, p. 542 (characteristic oceanic species); Gcogr. Journ., vol. 32, 

 No. 6, 1908, p. 603 (same). 



Antedon (Crotalometra) porrecta KOEHLER and VANLY, Hull. Mus. Hist. Nat. Paris, 1910, No. 1, p. 26 

 (collected by the Travailleur or the Talisman), p. 32 (45 C 19' N., 629' W.; 1,480 meters). 



Crotalometra porrecta A. H. CLARK, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 8 (west coast of Africa), 

 p. 37 (near Ascension, 420 fathoms; also Bay of Biscay, 1,480 meters); Smithsonian Misc. Coll., 



