On the Phylogeny and Anatomy of the Echinodermata. 361 



Lystrus longimaniis. 



L. trapezoideus, fusco-niger, parum nitidus ; antennis ferrugineis ; 

 rostro dimidio basali lineis elevatis instructo ; pedibus anticis 

 valde elongatis, tibiis eorundem fortiter arcuatis. Long. 2^ liu. 



Hah. Sumatra. 



Trapezoidal, brownish black, slightly glossy, antennas 

 ferruginous ; rostrum modera,tely long, basal half with raised 

 lines, the intervals punctured ; antennas with the club as long 

 as the funicle ; prothorax rapidly broader to the base, with 

 close-set granules in short transverse lines ; scutellum round'; 

 elytra narrowly striate, the interstices broad, with contiguous 

 punctures ] body beneath densely covered with pale greyish 

 scales ; intermediate and posterior legs very short, ferrugi- 

 nous, the tibige of the former with a tooth on the outer edge 

 at the base ; fore legs very long, their tibise strongly curved, 

 their tarsi of moderate length. 



A broader species than L. latipennis (Linn. Soc. Journ. 

 xii. p. 44, pi. iii. fig. 1) and differently sculptured. It is 

 possible that the remarkably long anterior legs may be a 

 sexual distinction, at least to a certain extent. 



L.- — On the Phylogeny and Anatomy of the Echinodermata. 

 By Ur. Otto Hamann *. 



1. Origin of the Echinodermata. 



If we set before us the question to what group of the Meta- 

 zoa, with reference to the whole of their peculiarities of 

 organization, are the Echinodermata most nearly related, the 

 answer will serve at the same time to throw light upon their 

 phylogenetic origin. I have said if we take into considera- 

 tion '' the w^hole of their peculiarities of organization," and 

 therefore the constitution of the nervous system, the body- 

 cavity, &c., and would thereby indicate that I must regard as 

 failures all the attempts which look only to a single system 

 of organs, such as has lately been made by Kleinenberg, who, 

 by taking into consideration only the nervous system, has 

 been led into the most wonderful speculations as to the origin 



* The concludiug chapter of a memoir on the Histology of the Echino- 

 dermata, translated from the ' Jenaische Zeitschrift,' Band xxi, pp. 232- 

 251. 



