A HISTORY OF SUSSEX 



EoLIDID-ffi 



1 60. Eohs papit/osa, Linnaeus. 



A fine species, and one that is always in 

 summer to be found on our coast. Length, 

 about 2 inches. The body is flesh- 

 coloured, powdered with opaque white ; the 

 papillae, which well clothe the sides, are 

 somewhat lanceolate in form and are usually 

 of a seaweed green finely speckled with 

 opaque white. The colours however run 

 through many gradations, as is seen in years 

 of great abundance, when all shades of 

 grey, green, orange, brown and brown- 

 purple make their appearance. Habitat, 

 along the shore under stones and crawling 

 upon mud and sand. Common. Hastings. 



161. /Eo/idel/a alden, (?) Cocks (? glauca). 

 A single specimen taken upon Lepralia 



foliacea from moderately deep water appears 

 almost intermediate in character between 

 this species and olidella glauca. In 

 form perhaps the specimen approaches 

 nearer to /E. a/deri, but in colouring, size 

 and habitat approximates to /E. glauca. 

 Length of specimen i inch, extending 

 when crawling to i^ inches. The papillae 

 are neither ' vermicular ' nor ' clavate,' 

 but are thickest at about the middle, 

 slightly conical at the apex, where there 

 is in many cases a small pimple-like in- 

 flation of the outer membrane. Under 

 magnification the internal gland is of a 

 seaweed green-brown, the sheath and apex 

 being pellucid white superficially and inde- 

 finedly banded with opaque sage-green 

 paling to white, with a glow of orange 

 upon the upper portions. The papillae of 

 the front row are semi-transparent white. 

 The oral tentacles are a little longer than 

 the dorsal ones, and are lightly tinged with 

 orange ; the latter are linear and obtuse at 

 the apex and of a bright orange colour 

 tipped with white. The tail is short and 

 not very pointed. From the veil, and ex- 

 tending midway down the back, the colour 

 is a bright orange, paling towards the middle 

 of the back. Hastings. 



162. Cuthona aurantiaca, Alder and Han- 



cock. 



Animal ^ inch in length. The papillae 

 are rather long ; gland of a rosy orange 

 colour finely granulated with red. The 

 apex and sheath are semi-opaque blue- 

 white ; below the apex and internally 

 is a zone of opaque white granules ; above 

 this zone and overlapping it somewhat 

 is a surface colouring of orange, toning 



down to yellow. Of the oral tenta- 

 cles, the sheath is transparent, colourless, 

 and the core semi-opaque white, rather 

 defined. This species bears some resem- 

 blance to the following species, but may be 

 distinguished by the absence of foot pro- 

 cesses, and by the presence of an orange- 

 coloured zone near the apex of the papillae. 

 Upon water-logged timber ; trawled ; rare. 

 Hastings. 



163. Cratena conanna, Alder and Hancock. 

 Length of specimen inch. The 



papillae are often carried bent ; they have 

 a sheath of blue-green or bottle-green, 

 the gland being orange coloured, or brown- 

 ish-orange speckled with dark brown ; but 

 very characteristic is a crown around the 

 apex, formed of linear opaque white gran- 

 ules, arranged perpendicularly to the surface. 

 These are generally very strongly marked, 

 but are occasionally absent, or nearly so. 

 The foot has two blunt processes. Rare. 

 Hastings. 



164. Tergipes despectus, Johnston. 



This little species is barely inch in 

 length, and when met with cannot be 

 confounded with any other. The body 

 is semi-transparent white, with a tinge 

 of red in front of and behind the 

 dorsal tentacles. Upon either side of the 

 back and arising from a central vessel are 

 three or four club-shaped papillae, with 

 glands of a mottled seaweed-green colour, 

 and apices of opaque white. The only 

 habitat is upon shore hydroids, particularly 

 Obelia gelatinosa and 0. geniculata, where it 

 will probably be first detected by the little 

 globular masses containing the eggs which 

 are deposited upon the stems. It may be 

 noted that the papillae of this little creature, 

 when gliding over the stems of the hydroid, 

 bear a striking resemblance to the egg cap- 

 sules of the latter, and hence may reap 

 some immunity from danger. During 

 some years this species is very plentiful. 

 Hastings. 



165. Galmna cingulata, Alder and Han- 



cock. 



Animal inch in length, long and 

 slender and with very tapering tail. The 

 character of the papillae in this species 

 has very faithfully suggested a comparison 

 to the quills of the ' fretful porcupine.' 

 In the Hastings specimens there are eight 

 rows of papillae, each papilla having three 

 surface bands of a marbled seaweed-green 

 colour ; above these is one of opaque white. 



102 



