100 MARINE POLYZOA. 



. 



5. CUPULARIA PYRIFORMIS, H. S. PL CXXIV. 



Polyzoary subconical or depressed, stellate ; cells pyriform ; 

 upper part raised, contracted ; margin of aperture thin, smooth ; 

 an internal lamina, the lower border of the opening in which is 

 straight ; under surface deeply grooved, ridges carinate, obscurely 

 punctate, with a single row of dots on either side. 



Hab. St. Vincent. Collection B.M. 



At first sight this species offers a close resemblance to the 

 preceding, from which, however, it differs in several respects. 

 Among which are 1 . the raised and free superior extremity of 

 the cell, the contracted neck between the vibracular opening and 

 the aperture of the cell ; 2. the thin overlapping margin of the 

 aperture; and 3. the punctation, though obscure, on the poste- 

 rior surface. Both species appear to grow upon arenaceous par- 

 ticles. 



2. LUNULITES. 



Cells arranged in series radiating from the centre and bifur- 

 iting as they advance 

 with those of the cells. 



eating as they advance ; vibracula in linear series alternating 



if 



Syn. as for Cupularia (part.). 



The observations given under the preceding genus are equally 

 applicable here ; it is necessary in addition merely to remark, 

 that it is probable the vibraculum itself in this genus is distin- 

 guished by having a bifid or trifid extremity; and that it is 

 not unlikely, from the length, strength and disposition of these 

 organs, that they may be employed for the purpose of locomo- 

 tion as well as of defence. 



1. LUNULITES GIBBOSA, n. s. PL CXI. 



Polyzoary very irregular in its form ; area of cell arched above* 

 straight below ; margin granular ; no lamina ; vibraculum bifid 

 or trifid at the extremity ; under side of polyzoary nearly even, 

 marked with faint lines, punctured, punctures in single or double 

 series on each ridge. 



Hab. Off Cape Capricorn, Macgillivray. 



2. LUNULITES CAPULUS, n. s. PL CXII. 



Polyzoary conical, much raised; area of cell semilunar or 

 arched above, straight below, with a small bifid denticle within 



