New Series, No. 231 (Vol. 58, Part 3). Price 10s. net. 
Subscription per volume (of 4 parts) 40s. net. 
JANUARY, 1913. 
THK 
Q y ARTERL Y JO URN A L 
OF 
MICROSCOPICAL SCIENCE. 
EDITKI) HY 
SiE RAY LANKESTER, K.C.B., M.A., D.Sc., LL.D., F.R.S., 
HONOKAKT rsi.l.uw OK BX8TKR COLI.II6R A5D HOMOBART RTUDB?(T OK CHRIST CHURCH, OXFORD; 
MBMB8U OK TUK 1X8TITUTK OK KHAXCR (ASSOCli 6TRARG8B DB l.’ACADEMtE 1>ES SCIBXCBb) ; 
CORKK8KORDBRT OK TDR IMKKRIAI. ACAUHMT OK SCINRCRS OK 8T. KRTKIiaBURG, AND OK TUB 
ACADRMY OK BCIRXCK8 OK K II 1 1. A D R I.K U I A , AXO OK TUB BOTAt. ACADKMY OK 8C1BRCKS 
OK TUBIX; KOKKIQX HRMBRR OK TUB BOVAI. SOCIBTY OK BCIUXCBS OK 
eOTTIXGBX, ARD OK TUB RoYAI. BOIIBMIAX SOCIKTT OK 8C1BXCK8. AXD 
OK TIIR ACAD8MT OK THR MXCBI OK BOMB, AXD OK TUB AMHHICAX 
ACADEMY OK ARTS AXD 8CIBXCM8 OK BOATOX t ASSOCIATE OK TIIR 
ROYAI. ACADRMY OK BHI.aiUM; UOXORARY MRMBBB OK TH8 
KRW YORK ACADEMY OF 8CIHXCR8, AXD OK TUB 
CAMBUIDOR KIIII.080PH1CAI. SOCIETY, AXD OK 
TUB ROYAI. KliTStCAt. SOCIETY OK BDtX* 
B II It e II . AXD OK TUB 
BlOl.OBICAl. SOCIETY OK KARtS, AXD OK THE CAI.IKOHXIA ACADKMY OK 8CIBXC88 OK BAX KItANCIBCO, AXD 
OK TUK ROYAL EOOLOQtCAI. AXD MAt ACOLOOICAI. SUCIHTY UK BBI.OIUM; 
CORRRSPUXDIXO MRMBBB OK TUB SHXKBXBBRO ACADKMY OK K R A X KKURT- A' M ; 
KORBI6X ASSOCIATB UK TUB XATIOXAI. ACADRMT OK SCIBXCBS. U.R.. AXD MRMSKK OK TUB 
AMBRICAX rillLOSOKHlCAI. SOCIETY * 
UOXORARY KBLI.OW (»K THE ROYAI. SOCIBTY OK BDIXBURGU; 
f.ATB DIRECTOR OK THE XATUUAt. IIISTORT l> H K A H T M H X T ■ UK TXE BHITIBII MI’RKIIM ; I.ATR PKR8IDRXT OK THE 
BHITISU .18SOCIATIOX KOH THK ADTAXCRMBXT OK SCIRXCS; LATE Kltl.I.KHlAX PKOKESSOR OK 
Kll TSiOl.OBT IX THE ROYAI. INBTITUTIOX OKBKHAT EHITAIX. 
LATE I.IXACER PEOFE8BOE OK COMPABATIYE AXATOMT AXD KKM.OW OK MKHTOX C O M.E G K . O X K O H D ; 
EMBRITUB PEOPBSSUE OK ZOOl.OOT AXD COMPARATIVB AXATOMT IX UXIYBK81TT COI.I.R6K. UXIVRK81TY OK I.OXDOX 
WITH THK CO-OPKKATION OF 
ADAM SEDGWICK, M.A., F.U.S., 
KKI.I.OW OK TUIXITT COM.RGR, CAMRKIDOB. AXD PROKBSSOR OK ZOOLOGY IX TUK IMPKUIAI. COf.I.BGE OK 
BCIBXCK AXo TBCUXOl.OOT, l.OXDOX; 
SYDNEY J. HICKSON, M.A., F.U.S., 
BRTBE PROKKBSOH UK ZOOLOGY IX TIIR UXIVBHSITY OK MAXCIIKstEK; 
E. A. MINCHIN, M.A., F.R.S., 
PHOKKSSOH OK PHOT OZOOl.OGT IX THR UXIVBRSITY OK I.UXDUX; 
AND 
GILBERT C. BOURNE, M.A., D.Sc., F.R.S., 
I.IXACER PROKKSSOR OK COMPAKATITK AXATOMYy AXD FELLOW OP MERTON COLI.RGK. OXFORD. 
WITH LITHOGRAPHIC PLATES AND TEXT-FIGURES. 
I. O N D 0 N . 
J. & A. CHURCHILL, 7 GREAT MARLBOROUGH STREET. 
1913. 
Adlard and Son, Impr.,] 
[London and Dorking, 
