Fam. 3, Plate 16. 



EOLIS LINEATA, Lov£n. 



E. gracilis, alba, pellucida, lineis tribus longitudinalibus, albis opacis ; branchiis linearibus, roseis 

 albo-lineatis, fasciculis 4 — 5 digestis ; tentaculis dorsalibus longiusculis, subcorrugatis, albis postice linea 

 opaca; angulis anterioribus pedis productis. 



Eolis lineata, Loven, Ind. Moll. Scand., p. 8. 



Aid. and Hanc. in Ann. Nat. Hist., v. 18, p. 294. 



Hab. Among rocks near low-water mark, Saltcoats, Ayrshire, Rev. D. Landsborough, junr. 

 Dredged in shallow water, Douglas, Isle of Man, J. A. 



Body an inch long, slender, transparent white, tinged with yellow or flesh-colour, with 

 three opaque white lines, extending along the body to the tail ; one of these runs along the 

 top of the back, bifurcating in front, and extending into the oral tentacles ; the other two 

 occupy the sides of the body, terminating anteriorly below the first cluster of papilla?. Dorsal 

 tentacles approximating at the base, rather long, linear, slightly tapering, and faintly wrinkled, 

 transparent yellowish white, with a line of opaque white down the back of each. Oral tentacles 

 slightly exceeding the dorsal pair in length, tapering, transparent, with a longitudinal opaque 

 white line : their bases form the sides of the head. Brancldce nearly linear, tapering a little 

 above. The central vessel, which nearly fills the sheaths, is of a bright carmine colour, and 

 slightly granular. There is an opaque white ring near the tip, which is prolonged into a line 

 down the front of each papilla. The papillae form five clusters on each side of the back, the 

 first and second distinct, the rest coalescing : the first cluster contains sixteen or eighteen 

 papillae, the others are smaller, decreasing in size as they approach the tail. Foot linear, 

 grooved in front, and produced into tentacular processes of moderate length at the sides. 

 The colour is transparent white, tinged of a pinkish hue, from the viscera appearing through. 



It is rather remarkable, that this species should have been described at nearly the same 

 time and under the same name by Professor Loven and ourselves, in the distant localities of 

 Sweden and Britain. That Professor Loven's species is the same as ours, we have had an 

 opportunity of ascertaining, independently of the description, by the inspection of a drawing 

 of the Swedish mollusk, with which we have been favoured by the author. 



With us, this species must be considered very rare, a single specimen only having been 

 got by Mr. David Landsborough on the Ayrshire coast, and two by ourselves in the Isle of 

 Man. The spawn occurs in June, and is deposited in a narrow, undulating, spiral cord of 

 four volutions. 



This beautiful Eolis comes very near to some of our other British species, but is readily 

 distinguished by the white lines on the body, particularly those on the sides, and by the 

 bifurcating line in front. 



Figs. 1, 2, 3. Eolis lineata, different views. 



4. Two of the papillae more highly magnified. 



5. The spawn. 



6. A portion of the same showing the ova. 



