84 LEPAS ANSERIFERA. 



second pair; spine-bearing surfaces only slightly protu- 

 berant. Caudal appendages smooth, curved, pointed. 



Size. — The largest specimen which I have seen, had a 

 capitulunTone inch and a half in length. 



Colours. — The white valves are edged with bright 

 orange membrane ; and are so close to each other that 

 no interspaces, coloured from the underlying corium, are 

 left. Peduncle, dark orange-brown, with the uppermost 

 part under the capitulum bright orange all round; the 

 chitine membrane itself being thus coloured. Sack, in- 

 ternally, dark purplish lead-colour. Body and cirri, 

 either nearly white or pale purplish-lead colour, with the 

 arms of the second, third, and fourth cirri, and pedicels of 

 the fifth and sixth, more or less tinted with orange. A 

 specimen preserved during fourteen months in good spirits 

 had only a tinge of orange left round the orifice and round 

 the upper part of peduncle, and on the cirri. In some 

 other specimens, badly preserved, the chitine membrane 

 was quite colourless, and sack and cirri dirty lead-colour. 

 Fresh ova, peach-blossom-red ; immature ova, in ovarian 

 tubes, pale pink. 



Monstrous Variety. — In Mr. Stutchbury's collection, 

 there was a specimen, with the scuta, broad, smooth, thin, 

 and fragile, without any ridge running from the umbo 

 to the apex, and with the occludent margin reflexed. 

 This seemed caused by the shell having been attacked by 

 some boring animal, and from having supported Balani. 

 In the same specimen the first cirrus on one side was 

 monstrously thick and curled ; the second cirrus had its 

 posterior ramus in a rudimentary condition. In Mr. 

 Cuming's Collection, there are small specimens with 

 the zones of growth overlapping each other, with thick 

 irregular margins, and with the carina distorted. 



This species has cost me much trouble : I have 

 examined vast numbers of specimens, from a tenth to 

 half an inch in length, attached to light floating objects, 

 such as Janthinae and Spirulse from the tropical oceans, 

 which all resembled each other, and slightly differed 



