214 ACTINLK OF AI.HATROSS EXPLORATIONS MOMURRICH. 



Fitj. 33. luiKU- portion of transvorso section of moNontory of li. hnvicornis. Zeiss A2. 



S4. I'tirartis Imeolatu. Nat. size. 



35. Tiansvorse section of iini)«'rfect mesentery <>f Paraciis lineolafa. Zeiss a 2. 



3G. Transverse section of sphincter ninscle of /'. linvolata. Zeiss a 2. 



37. I'aractis r'niosa. Nat. size. 



3S. Transverse section of tentacle of /\ rliinm. Zeiss A. 2. 



39. Portion of transverse section of mesentery of /'. viiiosa. Zeiss A 2. 



40. Portion of transverse section of spliincti'r ninselc of /'. riin>i<a. Zeiss D 2 



Pi, A IK. wiv. 



FUj.dl. Transverse section of si»liincter of /'. rhiosa. Zeiss a 2. 



42. Transverse section (somewhat ohiiiiiic) of l>as(^ of a tcnta( le of .((7(»(<»ii».s' 



plthciiis. Zeiss A 2. 



43. Portion of transvers<' section of sphincter iniisclc of .(. y/Zr/icnis. Zeiss A 2. 



44. Portion of transverse sec^tion of priin.iry mesentery of .1. plchc'uis. Zeiss A 2. 



45. Transverse section of mesentery of A. pIchciKH. Zeiss a 2. 



46. Section, partly <iiaf>rammatic, showini; tiic arrangement of the mesenteries 



of Jclinontoht callosH. 



I'l.ATK XXV. 



Fi(l.47. AcilnosfoJa callom. Nat. size. 



4S. Transverse section of a tentacle of .1. cidlosit. Zeiss A 2. 



49 and 50. Transverse section of a ]ierf»'ct mesentery of A. callosa. Zeiss A 2. 



51. Transverse section of sphincter mnscle of A. caUoitd. x 2. 



52. I'ortion of transverse section of sphincter mnscle of /. cdllomi. Zeiss A 2. 



Pl.ATK XWI. 



Fig. 53. Aciinofiioln crccha. Nat. size. 



54. Transverse section of sphincter mn.scle of .1. cxrelstx. Zeiss a 2. 



55. Transverse section of perfect mesentery of J. excehu. Zeiss a 2. 

 56". Transverse section of [>ortion of a tentacle of J. twcclsa. Zeiss a 2. 

 57. Aclinonloht pertiamenlavta. Nat. size. 



•5S. TaiH'ential section of portion of the disk of a speeimen of Atlinostoht ptrqa- 

 mcutaaa. Zeiss A 2. 



Platk xxvii. 



Fig. 59. Transv(>rse section of spliincter mnscle of ./. pcrf/amcntacca. Zeiss a 2. 

 00. Portion of transverse section of a tt^ntacle of .1. pcrfidnuiitiicta. Zeiss A 2. 



61. Portion of transverse section of mesentery of .1. pergamenfacva. Zeiss 1) 2. 



62. Outer jiortion of transverse section of nu>sentery of .1. pirgumenttictti ahove 



the level of the parietc)- basilar muscle. Zeiss a 2. 



63. Mithlle portion of sanu> section as tliat from Avhich Fig. 4 was drawn. 



64. I'licinnilhiiH nialifmmix. Nat. size. 



65. Transvers(> st>ction of sphincter nniscle of /'. iiKdifontiis. x 1. 



66. Ptution of transverse section of aphimter mnseli> of P. mnliformis from the 



region indicatrd in I'Mg. (15. Zeiss 1) 2. 



67. Transverse section through a perfect mesent«'ry of /'. nmli/ormis. Zeiss a 2. 



Pl.ATK XX\1II. 



Fig.6S. Tangential section through disk of :> specimen of /'. inuli/ormis. Zeiss A 2. 



69. Ci/mhartis ftUHldild. Nat. size. 



70. Transverse se<tion of sphincter ninscle of ('. fdciihtild. Zeiss a 2. 



7i. Transverse section of nu'sentery of lirst cycle of (\ focidniid. Zeiss a 2. 

 72. Sagailid laclca. Nat. size. 



