88 DORIDIM. 



10. D. PROX'IMA, Alder and Hancock. 



D. proxima, A. & H. Brit. Nud. Moll. fam. 1, pi. 9. f. 10-16. 



BODY elliptical, orange-yellow: mantle with stout, conical 

 tubercles : dorsal tentacles linear or subclavate, laminated 

 nearly throughout : head-veil rather large, semicircular : gills 

 11, not quite closely surrounding the vent: liver large, ap- 

 pearing through the skin of a purplish-brown colour. L. 0-5. 



HABITAT : Among rocks and seaweeds at Birkenhead, where 

 it was found by Mr. Price ; but it has been now nearly extir- 

 pated by the alterations on that shore. Mersey and Dee (Col- 

 lingwood). It has not yet been found in any other locality. 

 [Bornholm Isle, in the Baltic (Meyer and Mobius).] 



D. proxima may be best distinguished from D. aspera by 

 the conical form of the tubercles. A good anatomical dis- 

 tinction is found in the tongue, which has 11 lateral plates 

 on each side : in D. aspera there are only 3 ; a satisfactory 

 character, confirming the small differences in the external 

 form. 



11. D. MURICA'TA, Miiller. 



D. muricata, Mull. Zool. Dan. iii. p. 7, pi. 85. f. 2-4 ; A. & H. Brit. 

 Nud. Moll. p. 42, and App. p. iii. 



BODY oval or roundish, yellowish -white : mantle with rather 

 large, close-set, rounded or clavate tubercles : gills? L. 0-3. 



HABITAT : Belfast and Strangford Lough. The only know- 

 ledge we have of this as a British species we owe to Mr. 

 Wm. Thompson, of Belfast, who took it in the above lo- 

 calities. [Scandinavian coasts (Miiller and others); Faroe 

 Isles (Morch).] 



12. D. LOVB'NI, Alder and Hancock. 



, Loven, Index Moll. Scand. p. 5. no. 18. .D. Love 

 I. H. 3rd ser. x. p. 262. 



BODY ovate, rather convex, yellowish -white : mantle with 



D. muricata, Loven, Index Moll. Scand. p. 5. no. 18. D. Loveni, A. & H. 

 in Ann. N. H. 3rd ser. x. p. 262. 



