AN NU LATA. 
Verm. 11 
75. Robinet, C. Kecherches physiologiques sur la secretion des glandes 
de Morren du Lumbricus terrestris. C. R. xcvii. pp. 192-194. 
76. Saint-Loup, — . Sur la structure du syst&me nerveux des Hiru- 
dinees. C. R. xcvi. pp. 1321 & 1322. 
77. Salensky, W. Etudes sur le developpement des Annelides. 3, 
Pileolaria ; 4, Aricia fcetida ; 5, Terebella mecJceli. Arch. bid. iv. 
pp. 143-264, pis. iv.-ix. 
78. Sciiultze, 0. Boitr/igo zur Anatomie dos Excrotious-apparates 
(Schleifencaniile) der Ilirudiueen. Arch. mikr. Anat. xxii.pp. 78-92, 
pi. i. 
79. Timm, R. Beobachtungen an Phreoryctes inenkeanus , Hoffm., und 
Nais , ein Beitrag zur Kenntniss der Fauna Unter-Frankens. Arb. 
Inst. Wiirzb. vi. pp. 109-155, pis. x. & xi. (See also Biol. Centralbl. 
iii. p. 498. 
80. Vignal, W. Recherches histologiques sur les centres nerveux de 
quelques Invertebres. Arch. Z. exper. (2) i. ( Hirudinea , 
pp. 343-374 ; Oligochceta, pp. 374-408.) 
81. Yiguier, C. Sur YExogone ( Exotolcas , Ehler) gemmifera, Pagen- 
stecher. C. R. xcvi. pp. 728-731. (Ann. N. H. 5, xi. pp. 389-391.) 
82. Voigt, W. Die Varietaten der Brancliiobdella astaci , Odier. Zool. 
Anz. vi. pp. 121-125 & 139-143. 
83. Zeppelin, Max [Graf]. Ueber den Bau und die Theilungsvorgauge 
des Ctenodrilu8 monostylos, sp. n. Zool. Anz. vi. pp. 44-61, and Z. 
wiss. Zool. xxxix. pp. 614-652, pis. xxxvi. & xxxvii. 
Anatomy and Development. 
Salensky (77), among various points of great interest, directs attention 
to a fusion of the ventral ganglia in Pileolaria , which, though a well- 
known phenomenon among Arthropods, has never yet been observed in 
Annelids. In Aricia , as in some other Annelids, some of the ova, though 
quite normal, do not begin to develop as soon as the rest ; the separation 
of the ganglia from the ectoderm is very late in being effected. In 
Terebella , true blood-vessels are not developed till very late, but the 
animal is long before provided with blood, and with circulatory organs in 
the form of a cavity surrounding the median portions of the digestive 
tube. 
On the segmental organs of Aphrodita ; Haswell, P. Linn. Soc. N. S. W. 
vii. pp. 610 & 611. 
Viguier (81) does not confirm the view of Pagenstecher, that asetal 
forms of Exogone are agamic, as he has fouud males and females in the 
sexual condition, both with and without setre. 
The mode of division in Ctenodrilus monostylos (83) is more primitive 
than in C. pardalis, for there is no zone of gemmation. Ctenodrilus has 
relations to the Polygordiidce , but also to the Oligocheetous Naids, while 
