( 'uvikkia. RADIATA. FISTULID/E. 483 



11. H. Montaguii. — Tentacula eight, with two small conti- 

 guous subsidiary ones. .Mouth simple. 



H. pen. var. Mbnl. Lin. Trans, ix. p. 112. tab. vii. f. 4.— Milton Sands, 



Montagu ; Frith of Forth, Mr Neill. 



The body is eylindric, white, covered with a mottled cuticle ; towards the 



head the whole becomes purplish-brown ; margin of the mouth white ; while 



alive, the two small subsidiary tentacula are alternately in motion, covering 



the mouth ; vent, pentangular, red The subdivisions of the tentacula are not 



so numerous as in the preceding species. 



12. H. NcilUi.—TentaculcL ten, with ten subsidiary ones stir- 

 rounding the margin of the mouth. 



Frith of Forth, Mr Neill. 

 This species, in form and colouring, bears a near resemblance to the pre- 

 ceding, but it differs in the exterior tentacula being more subdivided, and in 

 the number of the interior ones.. These last are similar in form to the outer 

 ones, though only about one-fourth of their size. This species was brought 

 to Mr Neill by a Newhaven fisherman, 3d September 1818. Being in 

 company with this intelligent observer of nature at the time, he kindly 

 presented it to me, and remarked, that it was different from the two species 

 which Professor Jameson, on his authority, had recorded (Wern. Mem. i. 

 p. 558.), as natives of the Frith of Forth, circumstances which indicate the 

 propriety of its specific appellation. I have since received a specimen from 

 Cape Wrath, through the kindness of my friend Dr Coldstream. 



13. II. dissi mills. — -Body pentangular, tapering to both ex- 

 tremities, suckers hard, conical ; tentacula of two kinds ; those 

 which are plumose are shorter than the five simple ones which 

 are opposed to them. 



A single specimen of this probably new species, about two inches in length, 

 was found by Dr Coldstream on Leith shore. 



14. H. pellucida. — Ten branched tentacula, translucent, with 

 numerous white papillae. 



Mull. Zool. Dan. t. exxxv. f. 1 In the Zetland seas, rare. 



Length about six inches, diameter scarcely one inch ; whitish ; five lon- 

 gitudinal muscular bands. The milky colour and delicate translucency of 

 this species readily serve as distinguishing marks. 



Gen. VII. CUVIERIA (Perm).— Body thickest in the mid- 

 dle, ascending, and attenuating towards the extremities. 



15. C. pliantapus. — Anteally obtuse, cylindrical; retrally 

 acuminato-conical. 



Holothuria phantapus, Linn. Syst. 1089. No. 2. Zool. Dan. tab. cxii. 



f. 1, 2, 3 Ascidia rustica, Penn. Br. Zool. iv. p. 48. tab. xxiii. f. 35. 



— Occasionally found from Devon to Zetland. 

 The body is usually from 6 to 8 inches in length, of a dark brown, rough, 

 with transverse wrinkles ; the head is a rich carmine, with ten cylindrical 

 tentacula divided at the ends ; the vent is surrounded by simple tentacula ; 

 the disk has two longitudinal marginal rows of suckers, and three in the 

 middle. 



Hh2 



