452 MR. G. W. BUTLER ON THE SUBDIVISION OF [Nov. 19, 
A communication was read from the Rev. Thomas R. R. Stebbing 
and Mr. David Robertson containing the descriptions of four new 
British Amphipodous Crustaceans. These were named Sophrosyne 
robertsoni, Syrrhoé fimbriata, Podoceropsis palmatus, and Podocerus 
cumbrensis. Of these, Sophrosyne robertsoni belonged to a genus 
first observed at Kerguelen Island. 
This paper-will be printed entire in the Society’s ‘ Transactions.’ 
The following papers were read :— 
1. On the Subdivision of the Body-cavity in Lizards, Croco- 
diles, and Birds. By Gerarp W. Butter, B.A. 
(Communicated by Prof. G. B. Howss, F.Z.S., F.L.S.) 
[Received November 14, 1889.] 
(Plates XLVI.—XLIX.) 
ConTENTs. Page 
Ly, Mritroductory ccsatsesere eset cee hae sneas ones Us aoteeer tees AdeMearuiateaed-ee 452 
TI. On the Subdivision of the Body-cavity in the adult Fowl ess cece re 453 
III. On the Development and Homelogies of the various Septa in the 
Body-camiiypotbhe) ObiGkKs recs ectest oc sen eacc anh oceaaues eee vaecase 455 
(a) On the Development of the Air-sacs in relation to the parts of 
the Avian Diaphragm ...............sesseesecseeeeeeseceesereeeeeseenees 456 
(6) Certain previous opinions with regard to the Avian Diaphragm. 458 
(c) On the Development of the Pulmohepatic Ligaments and 
TROCESSBS fis sito etc nk petiar ane saae eee ap decom edee Vusuinerae tad dons se eates 460 
(d) On the Homology of the Avian and Mammalian Diaphragms... 461 
(e) On the Development of the two parts of the Post-hepatic Septum 
of thé Bird .2.20.cccccsnasatecms eee ee ace te tte ttscckees ah eeeae sees 463 
IV. On the Body-eavity of the Lacertilia and of the Teiide in particular. 464 
(a) Dhe Dacertilia, wonoralliysesceterencmese<nendaesso-0ss0-2e00cehsaa-neepns 464 
(G) phe Mer dee jase seeane erate Ree eene os aaee's an: casTatsavoassceo, cncupeie' 466 
V. On the Body-cavity of the Crocodilia ............seeseessssssssseeeeeeees 467 
Vil? (Convlusionis fee. sca. t recor cereeeeeremrenteds ce vs acres ote scveassvesuanccusneteet 470 
VII. List of Memoirs and Papers referred to, and Postscript............... 471 
Villy Wxplanation of the pe lates tt-ce-n-.20.2:-e2---ssace-0ds-as venniden cavenarnuecs 472 
I. InrrRopuctToryY. 
There are embodied in this and another communication on the 
** Relations of the Fat-bodies of the Sauropsida”’ (see below, p. 602), 
the results of some months’ work, carried on in the Biological Labo- 
ratory of the Normal School of Science and Roval School of Mines, 
at the instigation of my teacher, Prof. G. B. Howes. To him my 
best thanks are due for most of the material employed, and still 
more for the time and trouble which he has always been ready to 
devote to furnishing me with suggestions and advice. For lesser 
gifts of specimens I have to acknowledge my indebtedness to Dr. A. 
Ginther, F.R.S., to Mr. G. A. Boulenger, to Prof. Wiedersheim 
of Freiburg, and to my fellow-student, Mr. E. W. L. Holt. Mr. 
Boulenger has, moreover, on various occasions kindiy furnished me 
with welcome information. 
