74 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Parasite. Gisl6n noted that two of the specimens from Mjoberg's station 10 

 were parasitized by a species of Eulima (=Sabinella sp.; see Part 2, pp. 648-649). 

 He said that Dr. Nils Odhner, of Stockholm, to whom he submitted the specimens 

 for determination, kindly gave him the following statement. 



The largest specimen, attached to the centrodorsal of a specimen of Oligometrides 

 adeonae, is 1.5X0.7 mm., and has nearly 8 turns. It is possibly identical with Eulima 

 capillastericola of Bartsch, but as the description of this species does not contain 

 anything especially characteristic and is not accompanied by any plate, it cannot 

 with certainty be identified the less so as even full-grown species of the genus 

 Eulima are extremely difficult to determine on account of their slightly characteristic 

 exterior and the absence of a radula. 



History. This species was first described by Lamarck as Comatula adeonae in 

 1816 from specimens that had been collected in Australia in 1803 by Francois Peron 

 and Charles Alexandre Lesueur during the expedition of the Geographe and Naturaliste 

 commanded by Capt. Nicolas Baudin. The species was named adeonae because it 

 was often found attached in large numbers to the broad foliaceous expansions of the 

 polyzoan Adeona. Lamarck's original description was republished by Henri Marie 

 Ducrotay de Blainville in 1818, by Jean Vincent Felix Lamouroux in 1824, and again 

 by de Blainville hi 1830. In 1836 de Blainville republished Lamarck's description, 

 and by a curious error illustrated the species by a reproduction of the figure of Comat- 

 ula multiradiata (=Heterometra savignyi) published by Savigny in 1817 (1826). 

 Lamarck's description was republished in the third edition of his work in 1837. In 

 the Penny Encyclopedia in 1837 the redescription of Comatula adeonae published by 

 de Blainville in 1836, together with Savigny's figure of Comatula multiradiata (=Hetero- 

 metra sangnyi), was included. Lamarck's original description again appeared in the 

 second edition of his work edited by Gerard Paul Deshayes and Henri Milne Edwards 

 and published in 1840. 



In 1841 Prof. Johannes Miiller included Alecto adeonae (Comatula adeonae Lam. 

 Blainv. Actinol. Tab. XXVI) in a list of previously noticed, but mostly incompletely 

 described, 10-armed species of comatulids. 



In 1843 Miiller redescribed Alecto adeonae on the basis of notes made by Dr. 

 Franz Herrmann Troschel on the type specimens in the Paris Museum. His rede- 

 scription was as follows: 



10 Arme. 20 Ranken am Knopf, aus 20 Gliedern bestehend, deren vorletztes nach innen einen 

 kleinen Dorn tragt. 3 Glieder der Radien. Diese so wie die nachst folgenden Glieder sind breit 

 und bilden zwei scharfe Kanten. Uber dem radiale axillare hat das dritte Glied das erste Syzygium. 

 Weiterhin 3-5 Glieder zwischen den Syzygien der Arme. Die Pinnulae an den Armen sind alle 

 lang, die ersten 3-4 aber die langsten. Grosse 4 Zoll. 



Neuholland. 



In his monograph on the comatulids published in 1849 Miiller republished ver- 

 batim this redescription, adding that the specimens were in the Paris Museum and had 

 been collected by P6ron, but omitting the locality. 



It is rather curious that in 1841 and again in 1849 Miiller referred to de Blainville, 

 1836, including a definite mention of the figure of Comatula multiradiata, but made no 

 comment on the fact that it represents a multiradiate and not a 10-armed species. 



In the monograph on the echinoderms written by Felix Dujardin and completed 

 and published in 1862, two years after his death, by L. H. Hupe", Comatula adeonae is 



