720 ZOOPHYTES. 



difications. When several lines proceed together in growth, their mutual influence appears 

 to result in a radiated structure. But whether this be so or not, this structure is the 

 highest to which cellule developement alone can attain. The unsymmetrical forms which 

 are exhibited in certain flowers, may all come under the general laws stated on page 99, 

 and be owing to a more rapid reproduction on one side than the opposite. 



Euphyllia aspera. p. 164. Mussa fastigiata. p. 175. 



The Euphyllia aspera, which appears to be in part the Caryophyllia fastigiata of 

 Lamarck, might with some propriety have been retained under his specific name. But 

 the term is bad, as the species grow in hemispherical forms-, a necessary result of their 

 furcato-ramose mode of increase. There can be no fastigiate zoophytes among the 

 Euphyllia). 



The term Mussa fastigiata, in page 175, is equally objectionable. This species has 

 been confounded with the E. aspera, although, taking Ellis's figure as at all correct, it is 

 strikingly different in its larger calicles, and the appearance of the exterior coste, and of 

 the slightly erose lamellae. It is probably a fragment from a hemispherical clump. 



Euphyllia costata. (D.) A specimen, placed in the hands of the author by Mr. J. S. Phil- 

 lips, of Philadelphia, has the strongly-ribbed exterior, non-spinulous and nearly smooth, of 

 the Mussa fastigiata, with the size of the E. aspera. The costs are very stout, and hardly 

 acute, and become quite obsolete, leaving the surface even below, an inch or less from 

 the summit. In a transverse section, the star is closely multiradiate, and the septum 

 enclosing it is very solid, and has the unusual thickness of a line to a line and a half. 

 The locality is not known. It is a species intermediate between the Musssc and Euphyl- 

 lise. The lamella; are entire, as in the latter genus, but scarcely meet at centre, a narrow 

 interval, the bottom of the cell, intervening. They are unequal, the largest somewhat 

 exsert, and cultriform. 



Astraa : Appendix. p. 252. 



A. Orbicella orion. (Dana.) A polypis parvulis (!'" latis), lamellis 24. Corallum 

 percellulosum : transverse secto, stellis orbiculatis, subtiliter annulatis, 1'" latis, medio 

 valde porosis, tenuiter 12-radiatis, aliis radiis intermediis obsoletis : septis percellulosis, 

 cellulis 1-2-seriatis ; verticaliter secto, textura subtilissime cellulosa, stcllie medio irregu- 

 laritcr minute porulosa. 



Polyps very small (11 lines broad), lamella? 24. Corallum light and cellular: in a 

 transverse section, stars circular, delicately annulate, a line broad, with a very porous 

 centre, delicately 12-rayed, with other obsolescent rays intermediate; septa very cellular, 

 cellules in one to two series; in a vertical section, texture very finely cellular, and irregu- 

 larly minute porous along the centre of the star. 



This new species, from Ceylon, of which I have only seen a worn specimen, is figured 

 on plate 14 : fig. 14, is a transverse section, natural size ; 14 a, same, enlarged ; 14 b, a 

 vertical section, natural size. The species resembles the annularis, but is more delicate 

 in texture, and unlike that species, has the centre of the star very delicately porous. In a 

 vertical section, three to four of the cellules in a longitudinal series (where coarsest) oc- 



