458 ZOOPHYTES. 



feet in breadth, quite horizontal above, and nearly flat below, with 

 the whole frond (including branchlets) about five inches in thickness. 

 In the following species, which this somewhat resembles, the calicles 

 are much unequal, giving the branchlets a ragged look. 



Madrepora appressa (?), Ehrenb., G. Ixix., sp. 3 : " Novempollicaris, prostrata, rcpens, 

 ramosa, ramis reliculato-coalitis, horizontalibus, ramulis, angulo recto surgentibus obli- 

 quisve, pollicaribus, simplicioribus, tubuliferis, imbricatis, tubulis myxatis, arete appres- 

 sis, amplis, hispidis, stellulis terminalibus tumidis, validius hispidis, obsolete striatis." 



25. MADREPORA ECHIDN^EA. (Lamarck.} Dana. 



M. late cespitosa (?), ramulis proliferis et irregularibus, ferme 3-4'" 

 crassis, tritico habitu affinibus sed gracilioribus. Corallum caliculo 

 apicali valde elongato; later alibus stride appressis, inaequalibus, tubi- 



formibus obtuse rostratis, scepe 3-4'" longis, extus levibus; apertura 

 minima, suborbiculatd ; stelld bene conspicud, duabus lameltis infra 



fere conniventibus. 



Broad cespitose (?), branchlets proliferous and irregular, about 3 or 4 

 lines thick; near the triticum in habit, but more slender. Corallum 

 with the apical calicle much elongate; the lateral close appressed, 

 unequal, tubular, obtusely rostrate, often 3 to 4 lines long, exterior 

 smooth ; aperture minute, nearly circular ; star very distinct, two of 

 the lamellae nearly meeting below. 



Plate 35, fig. 3, branch, natural size ; 3 a, calicle, natural size ; plate 

 31, figs. 9 a, 9 b, different views of calicle, enlarged. 



The East Indies. Sooloo Sea. Exp. Exp. 



Only a few fragments of this species were obtained by the author; 

 but their oblique mode of growth appears sufficient to indicate that 

 they belong to a horizontally growing zoophyte, resembling the plan- 

 taginea, and it may possibly come from the marginal portions of that 

 species. The branchlets are very unevenly covered with long cylin- 

 drical calicles having a smooth appearance and an obtuse elongated lip, 

 with the minute aperture situated a little below the apex. 



Mad. rosea, Esper, i. 115, tab. 15. Heteropora echidncea, Ehrenb., G. Ixix. sp. 



Oculina echidnaa, Lamk., ii. 457, No. 6. 13. 



