A MONOGRAPH OF THE EXISTING CRINOIDS 301 



Endeavour] between Fremantle and Geraldton, Western Australia [A. H. Clark, 

 1914] (1, W. A. M.). 



Hamburg southwest Australian expedition station 56 ; Koonibana Bay, 6-7 miles 

 southwest of Bunbury ; 14.5-18 meters; rocky bottom, with a few planthke organisms 

 July 28, 1905 [A. H. Clark, 1911, 1912] (3, U.S.N.M., 34933; H. M.; Berl. M., 5967). 

 PI. 32, figs. 96, 97. 



King George's Sound [A. H. Clark, 1911]. 



Port Phillip, near Melbourne, Victoria [A. H. Clark, 1911, 1912, 1913] (1, B. M.). 



Australia; HerrPreiss [J. Miiller, 1849; Dujardin and Hup6, 1862; W.B.Carpenter, 

 1866; P. H. Carpenter, 1879, 1882, 1888; A. H. Clark, 1911, 1912, 1913] (2, Berl. M., 

 1048). PI. 32, fig. 95. 



No locaUty [J. Muller, 1841, 1849; P. H. Carpenter, 1879, 1888]. 



No locality [Hartlaub, 1891]. 



No locality; Quoy and Gaimard [A. H. Clark, 1911] (2, P. M.). 



Erroneous locality. — ?Atlantic Ocean [Lamarck, 1816]. 



Geographical range. — Southwestern and southern Austraha, from Perth south- 

 ward and eastward to Port Phillip, Victoria. 



Bathymetrical range. — Inhabits shallow water, and has not been reported from a 

 greater depth than 14.5-18 meters. 



History. — This species was first described by Lamarck in 1816 under the name of 

 Comatula brachiolata. The locahty was given, with a query, as Atlantic Ocean. 



In 1841, Prof. Johannes Muller described Alecto rosea from a specimen without 

 locality in the Vienna Museum, and in 1843 he redescribed Lamarck's Comatula 

 brachiolata, from notes taken in the Paris Museimi by Dr. Franz Herrmann Troschel, 

 in the following terms: 



The entire dorsal surface of the centrodorsal is free, the cirri being arranged in a 

 single marginal row. The cirri are XV, 31-36. There are 10 arms. The first 4 

 brachials are united in 2 syzygial pairs. The following brachials are strongly produced 

 distally on alternate sides of the arm, these anterior processes forming blunted angles. 

 The intersyzygial interval is from 4 to 7 muscular articulations. P, is the longest 

 pinnule. "The last 8 segments are produced into teeth as in Comactinia echinoptera. 

 The segments of all the pinnules are strongly set off from each other so that the 

 pimiules are monihform. 



In 1841 Muller had referred both brachiolata and rosea to the genus Alecto, and 

 in 1843 he redescribed Lamarck's brachiolata under the name Alecto brachiolata. 



In his monograph published in 1849 he referred both of these species to Comatula. 

 He repeated his redescription of Comatula brachiolata, mentioning a dry specimen (or 

 specimens) in the Paris Museum. The locaUty he gave as unknowTi. This was 

 immediately followed by the description of Comatula rosea in the same terms he had 

 used in 1841. He mentioned the type specimen in the Vienna Museum, and also 

 others in the Berlin Museum which had been received from Australia ("Neuholland") 

 through Preiss. He noted that rosea is very close to brachiolata though not iden- 

 tical with it, as it differs in the characters of the first pinnules. 



Dujardm and Hup^ in 1862 repeated Miiller's redescription of Comatula brachio- 

 lata and added that the expanse is 100 mm. ; the arms, therefore, would be about 50 mm. 



