^., ECHINOIDEA. II. 



Analytical table of the Echinocardium species. 



1. Anterior ambulacrum deepeued 2. 



— uot deepened, flush with the test 3. 



2. The furrow continuing to the apical system; the pores within the internal 



fasciole in close, double series. Larger tubercles are found scattered on the 



I coraamm. 



anterior interambulacra above the ambitus 



[ (anstralcj. 

 The furrow ending abruptly at the anterior end of the internal fasciole; 



the pores within this fasciole distant and in single series. No larger tubercles 



above the ambitus mcditerranenm. 



3. No larger primary tubercles in the interambulacra above the ambitus; the 

 labrum very short, not reaching be>oud the middle of the first adjoining 



ambulacral plates pennatifidiivi. 



Larger primary tubercles are found at least in the anterior interambulacra 



above the ambitus; the labrum generally reaching the second adjoining 

 ambulacral plates 4- 



4. Very prominent primary tubercles in all the interambulacra above the am- 



Ijitus flavesce^is. 



The primary tubercles above the ambitus little prominent, and occurring 

 onl\' in tlie anterior interambulacra 5- 



5. Internal fasciole very small; a distinct saddle-shaped depression in the apical 



region capensc. 



Internal fasciole large; no saddle-shaped depression in the apical region .. intermedium. 



33. Brissopsis lyrifera (Forbes). 



PI. III. Figs. 2—3, 7, II — 12, iS, 20—23. P'- I^'- J'igs. 2—3, 9, 14—17. PI- XVIII. Figs, i, 6, 12, 18, 25—26. PI. XIX. Figs. 3, 6, 10, 



15, 18—21, 29, 34. 



Synonyms: Schizaster incerius Aradas. 

 Brissus pulviiiatus Phil. 

 Brissopsis pariiid \'al. 



Principal literature: Forbes: P>ritish Starfi.she.s. 1841. p. 187. — Diibcu & Koren: Skaudinav. 

 Echinodermer. p. 280. Tab. X. 46. — IMiilippi: Beschreibung einiger neuen Echinod. Arch. f. Naturg- 

 1845. P-347- — L. Agassiz & Desor: Catalogue raisonnc. p. 121. PI. X\'I. 12. — Sars: Norges Echi- 

 nodermer. p. 96. — A. Agassiz: Revi-sion of P^chini. p. 95, 354. PI XIX. Figs. 1—8 (non Fig. 9), XXI. 

 Figs. I— 2, XXXVIII. 36— 38. — Perrier: Recherch. .s. les pedicell. p. 173. PI. VII. 9. — Loven: Etudes 

 s. les Echinoidees. PI. I. i, II. 27-31, HI. 32, XII. loo-ioi, XXXVII. 213— 18. 6\\ Pourtalesia. PI. VIII. 

 66, IX, XIX. 223— 31. — Wyv. Thomson: -Porcupine -p;chinoidea. p. 750. — A. Agassiz: < Chal- 

 lenger -Echinoidea. p. 189. — Koehler: Recherches .s. les Echinoidees des cotes de Provence, p. 135. 

 Meissner & CoUiu: Beitr. z. Fauna d. siidost. u. ostl. Nordsee. II. Echinodermen. p. 334. (Figure.) 

 — Ludwig: Echinodermen d. Mittelnieeres. p. 562. — Bell: Catalogue Brit. Echinoderms. p. 172. — 



