ON THE GENUS EAMULINA. 



351 



5. Ramulma cervicornis (Chapman, PolymorpMna Orbignii, 

 var. cervicornis, 1892). 



Eigs. 45-51. 



Specific Characters. — Test attached ; commencing with a Poly- 

 morphine series, and continuing (usually from the apex, though 

 not always confined to that region) to grow in a strong, branching 

 manner, often closely resembling the antlers of deer. Apertures 

 at the terminal points of the branchlets. 



1. PolymorpMna OrMgnii, var. cervicornis, Chapman, 1892, 



G-eol. Mag., dec. 3, vol. ix. p. 54, pi. ii. fig. 5. — Test 

 attached to a fragment of Nucula. The initial series is that of 

 'PolymorpMna fusiformis, Eomer. The cervicorn outgrowth 

 is five or six times the length of the initial series of chambers. 

 ' It is apical, and, after proceeding for a short distance in a 

 vertical direction, branches off laterally, bearing the longest 

 part of the outgrowth. Gault ; Folkestone. — Fig. 45. 



2. Specimen A — Chapman Collection. — Commencing series 



broken open, and revealing a Polymorphine septation ; the 

 outline is that of P. angusta, Egger. At the apex there is a 

 slight constriction, upon which follows a tubular extension, 

 with a lateral offshoot. The whole is attached to a frag- 

 ment of molluscan shell. 



It is worthy of notice that tlie constriction above referred 

 to, as occurring between the Polymorphine series and the 

 outgrowth, probably facilitates the separation of the two 

 kinds of growth, giving rise to PamulincB without distinct 

 commencements, as in the aculeate examples. Grault ; Folke- 

 stone. — Fig. 46. 



3. D — Chapman Collection. — An elliptical commencement, re- 



sembling P. fusiformis, Eomer, is followed by an apical 

 outgrowth, which, before extending far, sends out a lateral 



