1x 
TO THE BINDER. 
The Binder will place the Plates thus :— 
Puate I. Hirudines, to front . : : : : » Page 
ie Hirudo octo-oculata, 
Ite Hirudo sanguisuga, 
LV. Hirudo stagnalis, 
Vv. Hirudo vitrina, 
VI. Gordius fragilis, . : 
VII. Gordius fragilis, figs. 1, 2, 3, 
WARD: Gordius fragilis, figs. 1 to 15, 
VILI. Gordius maximus, 
TX. Gordius viridis, 
Xe Gordius tenia, 
D,@ Gordius spinifer, 
UTE Gordius fuscus, 
XIII. Gordius anguis, 
XLV: Planaria cornuta, 
Vi: Planaria lactea, 
XVI. Planaria lactea, 
XVII. Nais, 
XOV LT: Cirratulus, 
XIX. . Lumbricus marinus, 
XX. Nereis and Spio, 
XXI.~ Nereis hirsuta, 
XXII. — Nereis bullata, 
XXIII. Nereis remex, 
XXIV... Aphrodita, 
XXV.\— Sabella, , 
XXXVI. Terebella littoralis, 
NXVII. y Terebella figulus, 
DORVAL. Terebella conchilega, 
X XIX. Yerebella tuberculata, 
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