2 go Shell Life 



{Antennularia antennina), at whose base it is fond 

 of resting:, and there, no doubt, its erect cerata min^^le 

 with, and pass as, the Hydra tuba. Tliere are two 

 other species. 



The Marbled Slug {Lomianotiis onarriioratus) has the 

 head hidden by a slight veil Avhich appears to be 

 a modification of the true tentacles. These are 

 mimicked by prolongations of the foot in front. 

 The rhinophores are club-shaped, and withdrawn at 

 pleasure into sheaths. From the back four or five 

 pairs of rounded and fringed lobes spread out, their 

 colour varying from fawn to reddish or dark brown, 

 spotted with white or brown. It attains a length of 

 2^ inches, and feeds upon corallines wliich it closely 

 resembles in colour and ornamentation. It swims 

 with considerable rapidity. Three other species are 

 included in the British list, but Mr. Garstang con- 

 siders all four to be but varying forms of one species 

 which he proposes to call Zoriianotus genei. 



The Plumed ^olis {yEolis papillosa) is very slug- 

 like, but the back is covered with numerous cylindrical 

 overlapping cerata, arranged in rows of about ten, 

 and with two erect slender tentacles such as in many 

 of the foregoing species bear the organs of smell 

 {rhinophores), but which are plain in this instance. 

 There is, in addition, a pair of ordinary tentacles 

 from near the mouth. The slug attains a length of 

 nearly 3 inches ordinarily, but examples have been 

 recorded measuring 4 and 4J inches. Its colour is 

 purple-brown, which harmonises with the smaller 

 wracks growing near low-water mark. The cerata 

 serve a double — nay, a fourfold — purpose : first, they 

 are the breathing organs, oxygenation of the blood 



