| OCR Text |
Show 1882.] CLASSIFICATION OF THE COMATULCE. 745 Symbol used. Character. Distichal. Palmar. Two joints, the axillary a syzygy . . 2d1 2 p. Three joints, the axillary a syzygy. . 3 3. Four joints, the axillary not a syzygy 4 4.1 As in Prof. Bell's system, the insertion of any sign within brackets ( ) would indicate the variable occurrence of the corresponding character. I subjoin the formulae for some typical examples of the proposed system, all of which, with the exception of Act. jukesi, are to be found described at length elsewhere. Antedon. rosacea A. 10. macronema A. 2. palmata A. 2.2.(2). rubiginosa . , A. 3. savignii A. 3.2. philiberti ... A. 3.3. Actinometra. a/-J Solaris a3 jukesi 3 nova-guinea meridionalis .... pulchella y rotalaria fimbriata J multiradiata .... aliernans parvicirra ... a. R. 10. |. ... a. R. -g- ... a. R. 3. p p'f -b* ... a. 10. ... a. 10. and a. 2. ... a. 2.3. a. 3. a. 3.2 b. ... a.3.2{p.(p')b} a. 3.2.3.2. .... a. 3.(3). a. The 2 might be omitted in accordance with Rules 1 and 2; but its presence more readily indicates the relationship of these two species to Act. nova-guinea, &c. 3. Another figure might be usefully added in order to indicate whether the next syzygy is in the third or in some subsequent brachial. y. As determined by myself. Muller's description is incorrect. g. The brackets { } are used in order to avoid repeating the 2 before each letter. The b. might be omitted in accordance with Rule 5 but is retained to indicate the relationship of this species to Act. fimbriata. 1 Hitherto unobserved. |
