POLYPI. 79 



Ammothea SAV. Polypary ramulose or shrubby, with Polyps 

 retractile into unarmed warts, clustered on the last branchlets. 



Sp. Ammothea mrescens SAVIGNY, Descr. de I'JSgypte, Polypes, PL n. fig. 6. 



Sympodium EHRENB. Common body, membraneous, effuse, with 

 Polyps retractile into unarmed warts that project only slightly, 

 without stem. 



Sp. Sympod. fuliginosum EHRENB., Anthelice species AUDOUIN, Descr. de 

 VEgypte, Polyp. PL I. fig. 6. 



Some Antkelice have retractile Polyps. They cover various marine bodies 

 as an incrustation. One species of this genus was described by PALLAS as 

 the crust of a Gorgonia: Gorg. corattoides, Elench. Zoophytor. p. 192, 

 ESPER Gorgon. Tab. xxxn. 



Evagora PHILIPPI. Polypary incrusting, formed of stolons 

 conjoining the several Polyps. Polyps with a basal portion harder, 

 coriaceous, a terminal retractile, soft. 



Sp. Evagora rosea PHILIPPI, WIEUMANN u. ERICHSON Archiv f. Naturgesch. 

 VIII. 1842, i. s. 36. Taf. i, f. i, c. Zoantha thalassantha LESSON (see above, 

 p. 77) appears to be another larger species of this genus. 



Alcyonium Cuv. MILNE EDW. (Lobularia LAM. Alcyonii 

 species L.) Body fleshy, turgid, usually inciso-lobate, covered with 

 Polyps scattered. 



The separate polyps are entirely retractile within the common 

 body, formed by the union or concretion of the external covering 

 of the polyps. This is thick and spongy, and contains a great 

 quantity of small irregular crystals of carbonate of lime. Propaga- 

 tion is by eggs and buds (gemmce). The form and size may be very 

 different in one and the same species, so that the distinction of 

 some of the species proposed by authors is uncertain. 



Sp. Alcyonium lobaturn PALL., Ale. digitatum L., JUSSIEU, Mem. de I'Acad. 

 des Sc. de Paris, 1742. PL ix. f. i. A J ; ELL. Corall. PL xxxiii. fig. a, A; 

 SPIX, Ann. du Mus. xin. 1809. PL xxxm. fig. 8 (named Ale. exos); LA- 

 MOUROUX, Hist, des Polypiers flexibles, PL xn. fig. 4, PL xm. PL xiv. 

 fig. i, JOHNSTON, Hist. Br. Zooph. 174. P1L xxxiv. xxxiv*. This species, 

 called by the Dutch fishermen, according to Pallas, dooden manshand or 

 duimen (deadman's hand or thumb), occurs in the North Sea, and attains a 

 size of o. 14 0.2 inillim. ; the form is very irregular, which, as it seems to me, 

 the name given to Pallas well indicates; the colour is brown -yellow. Ale. 

 palmatum PALL. Ale. exos L., BOHADSCH De quibusd. anim. mar. Tab. ix. 

 f. 6, 7. ESPER Alcyon. Tab. n. &c. This species occurs in the Mediterra- 

 nean ; it has the form of a little tree or shrub, and the branches are coloured 



