﻿PAPILLATE MONTIPOE^. 87 



spaces, confined as a rule to a slight protrusion of the lower margin of the calicle 

 ((/. M. gracilis). The surface is a delicate reticulum, web-like with small echinulations ; the 

 branches are very light and brittle. 

 The colour is yellowish. 



This is the description given by Dr. Klunzinger of one of Ehrenberg's types in the 

 Berlin Museum recognised by the former as a Montipore. Dr. Klunzinger suggests its affinity 

 with the M. midtilobata of Milne-Edwards and Haime. 



This is one of the many tufted forms from the Eed Sea, cf gracilis, crista-galli, circum- 

 vallata. 



67. Montipora circumvallata. 



Porites circumvallata, Ehrenberg, Korallenthiere (1834) p. 115. 

 Mampffra circumvallata, Dana, Zooph. (1848) p. 496. 



Montipora monasteriata, Klunzinger {non Forskal), Korallenthiere, pt.'ji. (1879) p. 34, taf. vi. fig. 2 ; 

 V. fig. 9. 



Description. — Corallum a tuft of branches tending to expand above, yet aU reaching to 

 about the same height. Below, they tend to fuse into leaf-like plates, even the free branches are 

 not round but slightly flattened and angular ; they end bluntly. The lower portions of the 

 stock die away. 



Calicles crowded, conspicuous, with six septa, sometimes more. Coenenchyma moderately 

 porous. The papillate uprisings tend to form protruding under-lips to the calicles. Towards 

 the tips of the branches these are more numerous, and individual calicles may be surrounded, 

 but in that case, the individual papillse composing the rampart are usually recognisable. 

 The papillse, which make the whole appear very rough, are 1 to 2 mm. in breadth and height. 



This is the substance of Dr. Klunzinger's redescription of Ehrenberg's type. It agrees 

 well with the photographs. On Ehrenberg's suggested identification of it with Forskal's 

 monasteriata, a suggestion adopted by Klunzinger, see p. 137. 



Dr. Klunzinger's photographs show that this type is much more distinctly papillate than 

 either M. crista-galli or M. gracilis. The papillse appear to fill up the whole of the interstitial 

 spaces and not merely, as in these forms, to project as under-lips to the calicles. 



68. Montipora stalagmites. 



"Montipora stalagmites, Ortmann, Zool. Jahrb., iii. (Syst.) (1888) p. 154, pi. vi. fig. 2. 



Description. — Corallum mounts up from an explanate, encrusting, but not extensive base 

 into a fused mass of upright processes which may be either thin and cylindrical, often hardly 

 5 mm. thick, or broader and leaf-like ; these fuse together, their tips give off blunt or slightly 

 pointed branches which often coalesce and then again break up into thin cylindrical branchlets. 

 The branches often attain a height of 15 cm. 



