36 EOLIDID/E. 



Genus I. EMBLETO'NIA^, Alder and Hancock. 



Body slender : tentacles 2, dorsal, linear ; the place of the 

 oval pair occnpied by 2 flattened lateral lobes : branchial pro- 

 cesses fusiform or clavate, set usually in single series on each 

 side of the back, occasionally in double [or triple] series or 

 clusters : oclontopliore linear, with a single series of plates, each 

 bearing a central spine and lateral denticles; jaws corneous. 



1. Embletonta pulchra^ Alder and Hancock. 



Pterockilus pidcher, A. & H. in Ann. N, H. 1st ser. xiv. p. 329. E. pul- 

 chra, Brit. Nud. Moll. fam. 3, pi. 38. 



Body fleshcoloured, spotted with white : tentacles short, set 

 wide apart : head-lobes rounded : branchial processes stout, 

 elliptical, orange-red spotted with white, 5 or 6 in single series 

 on each side : dorsal vessel red, undulating, appearing through 

 the skin. L. 0-2. 



Habitat: Within tide-marks at Eothesay, Isle of Bute 

 (Alder) ; Ardrossan, Ayrshire (Rev. D. Landsborough, jun.). 



2. E. MiNUTA_, Forbes and Goodsir. 



Eolidia minufa, Forb. & Goods, in Rep. Brit. Assoc. 1839. Embletonta 

 minuta, F. & H. iii. p. 607, pi. BBB. f. 5. 



Body pinkish-yellow, linear : tentacles rather longer than 

 the last, wrinkled : head-lobes produced : branchial processes 

 nearly linear, pinkish, tipped with white, 7 in single series on 

 each side of the back. L. 0-12. 



Habitat : Dredged in 7 fathoms among Laminarice at Ler- 

 wick (Forbes). 



3. E. pallida, Alder and Hancock. 



E. pallida, A. «& H. Brit. Nud. Moll. p. 52, and Appendix, p. xii. 



Body yellowish-white with a few black spots on the back : 

 tentacles approximating : head-lobes indistinct, forming a semi- 

 circular veil which is a little produced at the sides : branchial 

 processes nearly linear, very pale orange, set in a double longi- 

 tudinal row of 4 or 5 each on each side of the back. L. 0-1. 



* Named in compliment to Dr. Embleton, of Newcastle. 



