70 PROCEEDINGS OF SOCIETIES. 



Of course, the nomenclature which appears in the above work is strictly followed, 

 with one exception, which one is sufficiently accounted for in the proper place. 

 But as Dr. Gray's edition of Turton's Manual of Land and Fresh-water Mollusca 

 is in extensive use among naturalists in this country, it has been thought better to 

 give his names as synonyms, hoping, by this means, that collectors will adopt the 

 prior, though apparently new?, names for those mollusca, fully confident as we are 

 that this History, by Messrs. Forbes and Hanley, must unque'stionably rank as the 

 first work upon this subject, and will be the standard of reference to all who study 

 the objects upon which it treats. 



The figures after the authority for the specific names, refer to the volume and 

 page where the history of the mollusc is given in Messrs. Forbes and Hanley's 

 work. The synonyms, in italics, are the names given by Dr. Gray in his edi- 

 tion of Turton's Manual of Land and Fresh-water Shells. 



ACEPHALA TUNICATA. 



I. BOTRYLLID^E. 



1 Aplidium ficus, Linneus. v. 1. p. 11. 



2 Aplidium fallax, Johnston, v. 1. p. 11. 



3 Aplidium nutans, Johnston, v. 1. p. 12. 



|4 Sydnyum turbinatum, Savigny. v. 1. p. 14. 



5 Polyclinum aurantium, Milne-Edwards, v. 1. p. 14. 

 |6 Amouroucium proliferum, Milne- Edwards, v. 1. p. 15. 



7 Amouroucium Nordmanni, Milne-Edwards, v. 1. p. 15. 



8 Amouroucium Argus, Milne-Edwards, v. 1. p. 16. 



f9 Leptoclinum maculosum, Milne- Edwards, v. 1. p. 16. 

 flO Leptoclinum asperum, Milne -Edwards, v. 1. p. 17. 

 fll Leptoclinum aureum, Milne- Edwards, v. 1. p. 17. 

 jl2 Leptoclinum gelatinosum, Milne -Edwards, v. 1. p. 17. 



13 Leptoclinum Listerianum, Milne-Edwards, v. 1. p. 17. 



14 Leptoclinum punctatum, Forbes, v. 1. p. 18. 

 f!5 Distoma rubrum, Savigny. v. 1. p. 18. 



f!6 Distoma variolosum, Gartner, v. 1. p. 19. 

 f!7 Botryllus Scholsseri, Pallas, v. 1. p. 19. 

 f!8 Botryllus polycyclus, Savigny. v. 1. p. 21. 

 fl9 Botryllus gemmeus, Savigny. v. 1. p. 22. 



20 Botryllus violacens, Milne-Edwards, v. 1. p. 22. 

 |21 Botryllus smaragdus, Milne-Edwards, v. 1. p. 22. 

 |22 Botryllus bivittatus, Milne- Edwards, v. 1. p. 23. 

 f23 Botrylloides Leachii, Savigny. v. 1. p. 23. 

 f24 Botrylloides albicans, Milne- Edwards, v. 1. p. 24. 

 f25 Botrylloides rotifera, Milne- Ed wards, v. 1. p. 24. 

 f26 Botrylloides rubrum, Milne-Edwards, v. 1. p. 24. 



II. CLAVELINID^E. 



f27 Clavelina lepadiformis, O. F. Midler, v. 1. p. 26. 

 f28 Perophora Listen, Wiegmann. v. 1. p. 28. 



III. ASCIDIAD^E. 



29 Ascidia intestinalis, Linneus. v. 1. p. 31. 



|30 Ascidia canina, O. F. Midler, v. 1. p. 31. 



f31 Ascidia venosa, O. F. Muller. v. 1. p. 31. 



f32 Ascidia mentula, O. F. Muller. v. 1. p. 32. 



33 Ascidia arachnoidea, Forbes, v. 1. p. 32. 



|34 Ascidia scabra, O. F. Muller. v. 1. p. 33. 



35 Ascidia virginea, O. F. Muller. v. 1. p. 33. 



f36 Ascidia parallelogramma, O. F. Muller. v. 1. p. 34 



f37 Ascidia prunosa, Muller? v. l.p. 34. 



j-38 Ascidia orbicularis, Muller. v. 1. p. 34. 



