264 REPORT—1843. 
towards the north of England, and are not found at allin Scotland. The 
generic forms wanting in Ireland are Lithodomus, Capsa, Panopea, Galeoma, 
Unio, Crenatula, Neera*, all of which, with the exception of Unio, are very 
rare :—they have each but one representative British species. 
Distribution. 
S\2/¢|4 
$ 2 | 3 
Mollusca Tunicata. tad a a a 
Ascidia mentula, Mull. Zool. Dan. vol. i. p. 6. t. 8. f. 1-4. (Phallusia, Sav.)| , |...| 4 
» rustica, = a » p.14.t.15.f. 1-5. (Phallusia)...| , « 
»»  venosa, ” » by eRe 2Oerta 20, (Le)! eteserescenenanet uh 
»  prunum, * ie » p.42.t. 34. f.1-3 ...... aes eels 
» conchilega, ,, cs yy Po 42. 6.34. f,4-6  crcccecsvecees P 
»  parallelogramma, ,, vol.ii. p.11.t.49. (1) ......eeeeee seomeel 
>»,  canina, - 35 »» p-19.t.55.f. 1-6.(Phallusia) (1.)|...)... _ 
>»  aspersa, % + joe POSZt HOD LQ.) Meee sseeeel'y 
»  scabra, iy ts v9 Po 33. t.65. 1.3. (1) sesesecsseee] ye loon] y 
»  orbicularis, ,, , 99 ps OSHt7O. dy WS2e Ge) Nees veel y 
»  echinata, 43 »  VOl.iv. p.10.t.130.f.1...... Beiedes cscs 
»  mammillaris, Delle Chiaje, vol. iii. p. 187. 197.t.45. f. 14. (I.)... 
»  gemina, Templeton (R.) Mag. Nat. Hist. vol. vii. p. 129. f. 24. (I.) . 
>» anceps, = ” ” pre pe 130. F.2oe 
A. prunum ? (1.2)....ccsevecceseecrerevees ‘i 
» communis, Forbes MSS. e 
Phallusia intestinalis, Sav. Mem. p. 169.t.11.f. 1 
Cynthia microcosmus, ,, sie WA Ato Bi feley(Le) ces ws sebevenee venta eh 
ite claudicans, 5 pp imiplbOntsQetidiG.)enees. ssid Sal ee aeeaee ; i 
Clavellina lepadiformis, Sav.; Ascidia lepad., Mull. Z. D. vol. ii. p. 54. 
‘in 79.f. 5. Came e eer eee e ee eereeeeeeeesees Pee deeeerenreseee Fe eeeeresee Ce ePerercereee * 
3 variolosum, Gaert. Sav. Mem. p.38.&178? . 
Aplidium ? (more than One SPeCies) .....e.ssseeveeeerees setsevessee 
Sydneum turbinatum, Sav. Mem. p. 239? ...... 



Amaroucium proliferum, Hdw. Ascid. Compos., p. 67. pl.1.f.3. (L.) ...| 4 
Leptoclinum gelatinosum, __,, rr 35 p83. pless folie 
aa maculosum, ef Ms 53 p: 81s ple 8if. 2.0.) 22), 
8 asperum, - oe 35 p82..pl.8.f. 39) somes 
rr durum, A By A p- 82. pl.8.f.4. (1.) ol y 
Botryllus Schlosseri, Lin. (sp.) Phil. Trans. vol. xlix. p. 449. pl. 14 «.++.-! x 
»  Leachii, Sav. Mem. p. 199. pl. 4. f.6. & pl. 20. f.4 ...ccseseeseee s 
5 polycyclus, Sav. Mem. p.47. pl.4.f.5 (L.) wccsssssecescsseeeeenees | |e] a 
»  gemmeus, Sav., Edw. Ascid. Comp. p. 89. pl. 6. f. 5. (1.) sss) 4 
>»  bivittatus, Edw. ,, PS 35 p- 92. pl. 6.f. 7. (1.) ig 
In Loudon’s Magazine of Natural History, vol. vii. p.129, Mr. R. Temple- 
ton described and figured two species of the Moll. Tunicata, and eighteen 
more were recorded by myself in the Annals of Nat. Hist., vol. v. p. 93 :—in 
the 13th volume of the latter work the additional species introduced here will 
be more particularly noticed. My knowledge of the Tunieata not being ad- 
vanced beyond the identification of the species with those of the authors cited, 
the names are given in the consecutive order in which they appear in their 
works, without any attempt being made to bring the species (“simple” Asci- 
diz) under their modern genera. Such of Muller's species as Savigny brought 
under certain of his genera have these added within brackets in the accom- 
panying table. 
* The introduced Dretssena is not included. 


