48 



dorsal pair, set on the upper surface of the lips : branchial 

 processes few, stout, cylindrical, of a yellowish olivecolour, 

 with transverse bars of a darker shade, sometimes indistinct ; 

 tips pale ; they are set in 6 or 8 rows of 3 or 4 each : foot 

 with the anterior angles obtuse. L. 0-5. 



HABITAT : Under stones between tide-marks, "Whitley and 

 Cullercoats, not rare (A. & H.) ; Ardrossan, Saltcoats, 

 Rothesay, and Lamlash (Alder); Burghead (Murray); Pen- 

 zance (Alder). [Dee estuary, Cheshire (Collingwood) ; Fal- 

 mouth (Cocks) ; Shetland (Norman).] 



This Eolis is subject to a little variation in colour; the 

 olive sometimes assumes a reddish or greenish tinge. It 

 may, however, generally be recognized by the red lines on 

 the head and tentacles. The localities quoted will show that 

 it is pretty generally diffused, though it is nowhere abundant. 



24. E. AURANTI'ACA, Alder and Hancock. 



E. aurantiaca, A. & H. in Ann. N. H. 1st ser. ix. p. 34 ; Brit. Nud. Moll, 

 fam. 3, pi. 27. 



BODY rather robust, buffcoloured : dorsal tentacles of mode- 

 rate length, rosy-orangecoloured : oral tentacles shorter, 

 whitish : branchial processes linear oblong, rather stout, pur- 

 ple-orange below, with a white ring above, and bright orange 

 tips ; set in 10 or 11 rather close rows, commencing at the 

 sides of the head : foot pellucid white, tapering to a fine point 

 behind ; the anterior angles very obtusely rounded. L. 0-5. 



HABITAT : Between tide-marks and in shallow water, Cul- 

 lercoats and Whitley, Northumberland (Hancock) . Ardrossan, 

 Ayrshire ; Powey Harbour, Cornwall ; not uncommon (Alder). 

 Liverpool (Collingwood). [Lamlash (Landsborough) ; Shet- 

 land (Norman). W. Sweden (Loven).] 



E. aurantiaca has a considerable range. The south-coun- 

 try specimens are generally brighter- coloured than those in 

 the north, the colour of the papi]la3 sometimes approaching 

 scarlet in the under part. There is also occasionally a diffe- 

 rence in the proportional colouring of the parts, the orange of 

 the tips, however, being generally conspicuous. 



