184 Miscellaneous. 



1. Epibranchs, which have them on the back (Doris, Glabellina, 

 &c.). 



2. Peribranchs, which have them round the mantle (Tritonia, 

 Glaucus, Scyllcea, Plocamocera, &c.). The Eolidce would be 

 allied to both the Epibranchs and Peribranchs. 



3. Hypobranchs (the Inferobranchs of Cuvier). The Thetydes would 

 approximate all three Orders. 



4. Pleurobranchs, which have the branchiae on the side ^Pleuro- 

 branchus, Pleurobranchidium, Laniogera, &c.). The Pleuro- 

 branchs lead both to the Stegibranchs by their small test, and to 

 the bulk of the Endobranchs by the pectinated form of the 

 branchiae. 



II. The order of Stegibranchs ((trey?/, a roof) would include 

 four divisions : — 



1 . Stegibranchs proper, corresponding to the Tectibranchs of Cuvier 

 (without the Pleurobranchs) and to the Scutibranchs of the same 

 author. 



2. Cyclobranchs, corresponding with Cuvier's group. 



3. Heteropod Stegibranchs (Heteropoda of Cuvier), which, if we 

 take Carinaria as the type, have the heart and branchiae within a 

 small shell. The shelless Heteropoda must be left with Carinaria. 



4. The lanthince, which have their branchial laminae half concealed 

 by the shell, and which, like the Heteropoda, deserve to be sepa- 

 rated on account of their curious appendage. Their pectinated 

 branchiae also form a transition from the Stegibranchs to the 

 Endobranchs. 



III. The order of Endobranchs would correspond with the 

 Pectinibranchs and Tubulibranchs of Cuvier. They may be divided 

 into Turbinata and Tubulata. 



1. The Turbinata (the old Pectinibranchs) might retain the old 

 Cuvierian subdivisions, or the much more natural division of De 

 Blainville into Siphonobranchs and Asiphonobranchs. 



2. The Tubulata are the old Tubulibranchs. 



Comptes Rendus, Nov. 16, 1863, p. 826. 



Fucus anceps, Ward & Harvey. 

 " Notwithstanding all that has been said pro and con, I have now 

 to inform you that the Kilkee Fucus is neither F. distichus nor yet 

 F. fuscatus, nor yet any species known to Prof. Agardh, from whom 

 I have just received a specimen of the true F. distichus of the elder 

 Agardh ; and so, being constrained to give it a name, I propose to 

 call it Fucus anceps, Ward & Harvey ; and I request you to make 

 known this alias to all to whom you have (on my authority) given 

 the wrong name. This Fucus seems to combine the characters of 

 the ribbed and ribless species, and therefore it may with propriety 

 be named F. anceps." — Prof. J. H. Harvey to Dr. Gray, Dec. 26, 

 1563. 



