37 



slightly pointed on the outer, and wared on tlie lateral 

 margins. 



Ellis states that his specimen had no ovarian vesicle and 

 that he had never seen any ; Johnston, Lamouroux and all 

 other authorities to whom I have access do not mention 

 them, and the specimens I have are without any, so that at 

 present they appear to be unknown.* 



SHRUBBY CORALLINE. Plnmularia Frutescem. Stem 

 dark brown, composed of sub-parallel tubes irre;5ularly 

 branched, branches pinnate, pinnae alternate, bifid ; cells 

 distant, ovato-tubular with plain and sliijhlly everted rims; 

 vesicles ovoid, smooth, with small terminal apertures. 



Sertularia frulescens, Ellis and Solander's Zooph., p. 55, 

 pi. 6, fig. a A, pi. 9, figs. 1, 2, covered by an Alcyoniura. 

 Turton's Lin,, vol. 4, p. 680. Stewart's Elem., vol. 2, p. 445. 

 Plum, frutescens, Fleming's Brit. An., p. 547. Johnston's 

 Brit. Zooph., p. 149, pi. 20, figs. 2, 3. Aglaophenia fru- 

 tescens, Laraouroux's Cor. Flex., p. 173. 



Hab. On stones from deep water, from the Eddystone to 

 the Deadraan. Common, but not abundant. 



This species is of a dark brown colour and varies from one 

 to five inches in height. The stem is composed of aggregated 

 sub-parallel tubes of a dusky brown colour, and not polished. 

 The pinnae are closely arranged, formed of single tubes and 

 bifurcated, with one cell on each internode. The cells much 

 resemble old fashioned coffee cups, with patulous apertures 

 having slightly everted rims. They lie close to the pinnaa, 

 and are lodged in a slight cavity of the internode, with a 

 transparent triangular denticle between each. Sometimes 

 they are much branched and bushy, but most commonly are 

 only a simple frond. The vesicles are numerously produced 

 in March and April, on the upper edges of the pinnae. They 

 are small, ovoid, with prolonged terminal apertures. 



LAOMEDEA. Lamouroux. 

 Generic Character: Polypidom rooted by a creeping fibre, 

 plant-like, erect; jointed at regular intervals, the joints 

 ringed, incrassated, giving origin, alternately on opposite 

 sides, to the shortly pedioled cells; cells campanulate ; 

 vesicles axillary. Polypes hydraform. 

 SEA THREAD CORALLINE. L. Dichotoma. Stem 

 filiform, branched dichotomously ; cells alternate campa- 

 nulate, the rim even. 



* The vesicles of this species have since been seen by the Rev. 

 D. Lansborough of Ayrshire, he says " they are as remarkable as those 

 of P. Cristata," but does not describe them. Zoologist, vol, 1, p. 88. 



E 



