XII 
8. Organs of Secretion, 
9. Organs of Generation, . . .» 
ODOT Hp od ee 
© GOTH Sup oo bo ee 
PCoOronpnre 
Classification and Bibliography, . . 
. Cutaneous Envelope and Skeleton, - . 
. Muscular System, and Organs of Locomotion, . . . . 
. Nervous System, ‘ 
. Organs of Sense, . 
. Digestive Apparatus, 
Circulatory System, . 
. Respiratory System, . 
. Organs of Secretion, 
. Organs of Generation, 
Classification and Bibliography, 
. Cutaneous System, . . 
. Muscular System, and Organs of Locomotion, 
. Nervous System, 
Organs of Sense, 
. Digestive Apparatus, 
. Circulatory System, 
Respiratory System, 
. Organs of Secretion, . - 
. Organs of Generation, . 
Classification and Bibliography, .. .« 
. Cutaneous System, . 
. Muscular System, and Locomotive Organs, . . 
Nervous System, and Organs of Sense, . 
. Digestive Apparatus, 
Circulatory and Respiratory bc amed 
. Organs of Secretion, 
. Organs of Generation, . . 
Classification and Bibliography, . 
. Cutaneous System, 
Muscular System, and Locomotive Organs; eu 
. Nervous System, and Organs of Sense,. . 
. Digestive Apparatus, 
Circulatory and Respiratory Systems, 
. Organs of Secretion, . see 
Classification and Bibliography, . 
. Cutaneous System, . 
CONTENTS. 
Iv. THE ECHINODERMATA 
Muscular System, and Locomotive Organs, «+... .. 
SECTION 
ee i Bh wh ee ee, Gel 65 
Sigheiiel acl uae decent sata ara:. (OG270 
shea hee aleal feast “GI ah hte al 
Bisse avis eo wie a a OPER TB 
See eae 2 1678 
cS So eo wh ina a Be we 99280 
Sain ee ew Sa Giahe sols Bee 81 
Sime goede a qs a8 Sle eects 82-86 
te ee ee ee 87-88 
Nis Sap dao jel cey ah Carchad. tet eyo a eee eee ew ee 689-98 
Bsc GaGn thay thus. ee erat aa a3 fe ; 94 
Ble nay ad tea) We Pa ods e wile te es) 106298 
VY. THE HELMINTHES. 
arias Tas Bc Macy os er a 99 
Bob . aouelss ihn ae oe ee OOO 
oe Be 3 ee eee © 102-108 
eee ee wine ae 104 
ee ce a Bs eae 6 208 
iene ee sae «6106-109 
eat oie oad te ew LLOSTET 
oe eH 8 8 we we 112 
era a he! eo fer te ww 113 
Se ea ae a eR T19 
VI. THE TURBELLARIA, 
tee RHR DED © & 120 
aa ee ae 121 
eee ee eS PS 
ie ables eh ah de cit ios ans we DBT 
Gita tal airehe evutiwery. | aOR 
se Tate ete Keel GEL Shahar 126 
Bana Belie wee sig op ohtes da wae eyo AT 
. see ee 6 128-129 
VI. THE ROTATORIA. 
CRE Saaee: F180 
5 gy “efias eee : ree i) 
ios wiles a Gis vo LBD=TBS 
8 esi a oo 184-185 
eae yi cue 
YI ‘tHe ANNELIDES. 
3 SO Yee ah 142 
(eee eM we Be 143 
wee 144-145 
