288 PLTJMULARIID^E. 



abundant ; Scilly (T. H.). Var. /3. Cork Bay (J. V. Thomp- 

 son) : Ilfracombe; South Devon (T. H.). 



[Belgium, on Fucus, very rare (Van Ben.): La Charente 

 inferieure, pretty common (Beltremieux) : Bay of Naples, 

 not uncommon, growing on small algas, frequently on the 

 stems of Caulinia oceanica, of small size; also from 1-2 

 fathoms depth; Messina, from 3040 fathoms, of much 

 larger size. Var. ft on Cystosira ericoides (Sars): Mossel 

 Bay, South Africa (Krauss) .] 



2. A TUBULIFERA, Hincks. 



PLUMULARIA CRISTATA, var., Couch, Corn. Faun. 32 ; Johns?, B. Z. 94, fig. 16. 

 TUBULIFERA, Hincks, Devon. Cat. Ann. N. H. (ser. 3) viii. 256, 



pi. vii. figs. 1, 2. 



Plate LXIII. fig. 2. 



SHOOTS tall, slender in habit; STEM divided by oblique 

 joints into short internodes, each of which bears a 

 pinna; pinnae alternate, long, approximate, springing 

 from the anterior aspect of the stem; HYDROTHEC^E 

 deep cup-shaped, slender, incurved above in front, 

 margin finely denticulate, very slightly everted; NE- 

 MATOPHORES tubular, with an oblong terminal aper- 

 ture, the lateral large and very prominent, forming 

 ear-like appendages on each side ; the anterior a long 

 spine-like process, tapering downwards, free through a 

 large part of its length, and sometimes projecting be- 

 yond the rim; CORBUL^ long, pod-shaped, with nume- 

 rous serrated ribs (7-11), which are very prominent and 

 sometimes rise at the top into crested ridges furnished 

 with an expanded spur-like process with serrated edges, 

 springing from the base at one side ; GONOTHEC^E oval, 

 shortly stalked, arranged in a double row along the cen- 

 tral line. 



THE plumes of this species are of a very delicate habit, 

 and reach the height of 2 or 3 inches ; they bear a strong 



