152 



ECHINOIDKA. II. 



Analytical table of the Echinocardium species. 



i. Anterior ambulacrum deepened 2. 



— not 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 



1 cordatum. 



anterior interambulacra above the ambitus 



\ (australe). 



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 mcditcrraneum. 



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

 labrum very short, not reaching beyond the middle of the first adjoining 



ambulacral plates fennatifidum. 



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- 

 bitus flavesccns. 



The primary tubercles above the ambitus little prominent, and occurring 



only in the 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. 



^. Brissopsis lyrifera (Forbes). 



PI. III. Figs. 2—3, 7, 11 — 12, iS, 20—23. pl - Iv - Fi g s - 2 —3. 9. H— 1 7- pl - XVIII. Figs. 1, 6, 12, iS, 25—26. PI. XIX. Figs. 3, 6, 10, 



15, iS— 21, 29, 34. 



Synonyms : Schizaster incerlus Aradas. 

 Brissits pulvinatus Phil. 

 Brissopsis parma Val. 



Principal literature: Forbes: British Starfishes. 1841. p. 187. — Diiben & Koren: Skandinav. 

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

 1845. P- 347- - ~ L. Agassiz & Desor: Catalogue raisonne. p. 121. PI. XVI. 12. — Sars: Norges Echi- 

 nodermer. p. 96. -- A. Agassiz: Revision of Echini, p. 95, 354. PI. XIX. Figs. 1 — 8 (11011 Fig. 9), XXI. 

 Figs. 1 — 2, XXXVIII. 36 — 38. -- Perrier: Recherch. s. les pedicell. p. 173. PI. VII. 9. — Loven: Etudes 

 s. les Echinoidees. PI. I. 1, II. 27 — 31, III. 32, XII. 100 — 101, XXXVII. 213—18. On Pourtalesia. PI. VIII. 

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

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

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

 - Ludwig: Echiuodermen d. Mittelmeeres. p. 562. — Bell: Catalogue Brit. Echinodernis. p. 172. — 





