566 DORIDID^. 



Length nearly an inch. The aspect of this species 

 reminds us of a Planaria. It was discovered by Mr. 

 AUler in Lamlash bay, Arran. 



6. D. REPAXDA, Alder and Hancock. 



Doris repanda. Alder and Hancock, Annals. Nat. Hist. vol. ix. p. 32. — 

 Monograph, part 3, fam. 1, pi. 6. 



Body depressed, elliptic, of a waxy white hue. Oloak 

 ample, covered with small, distant, inconspicuous, white 

 tubercles, a row of yellowish-white spots down each side. 

 Dorsal tentacles rather long, white. Oral tentacles flat, 

 broad, forming a veil. Branchial plumes small, five, white, 

 retractile within a single cavity. 



Length above an inch. It has been taken on the east 

 coast of England, and the west coasts of Scotland and 

 Ireland. 



7. D. uLiDiANA, Thompson. 



Dons ulidiuna, Thompson, Ann. Nat. Hist. vol. xv. p. 312. 



Body depressed, ovate oblong, pale yellow. Cloak not 

 ample, rough with spicula, and covered with large, unequal, 

 obtuse tubercles, the spicula collected in bundles, and 

 radiating at their base. Dorsal tentacles long and whitish, 

 without sheaths, the edges of the apertures plain. Bran- 

 chial plumes eleven, pinnated, white. Foot rather broad. 

 Veil above the mouth semicircular. 



Length half an inch or more. Upon oysters on the 

 north-east coast of Ireland (Thompson). 



