34 ‘ EMBRYOLOGICAL MONOGRAPHS. ; an 
; A (te 
43. Larva of Hormiphora plwmosa, gen. Ag. sp. Sars. ga. Stomach. J.tb. Lateral tube. OGY. Otocyst. 
or. Mouth. sph. Funnel. : 
44, Embryo of Beroé rufescens, Forsk. (Forskalea, Chun.) J. tb. Lateral tube. ol. Otolith. The otocyst is not 
yet formed about the otolith. or. Mouth.  ' 
45. Larva of the last named, which has reached sexual maturity. 7. Otolith already enclosed in its toepatl “a 
or. Mouth. pig. Pigment. ‘ 
46. Beroé roscola, from Agassiz, op. cit. Pl. III. fig. 18. Embryo seen from “ abactinal” vole, ol. Otolith. — 
7. Row of vibratile flappers. ; oy 
47, Beroé rufescens, from Chun, op. cit. Pl. XIV fig. 11. Larva seen from one side. ocy. Otocyst. ’ 
or. Mouth. tb. Chymiferous tubes. >) 
48-50. Beroé roscola, from Agassiz, op. cit. Pl. III. figs. 19, 20, 22. 
48. Larva somewhat older than that shown in figure 47, in which the two chymiferous tubes, under the co! 
nearest the medial line of the figure, have pushed their way to the vicinity of the mouth. ga Stomach, 
which occupies the whole body cavity. or. Mouth. 7. Vibratile flappers. 
49, View of an older larva, seen at right angles to the last. The two tubes, which in fig. 48 were represen 
as approaching the mouth, have in this united, forming a ring about it. The other tubes are advancing 
the labial region. ga. The whole cavity of the larva forms a stomach ; the portion marked (ga) one 
the tubes of the body walls. ocy. Otocyst. 7. Vibrating flapper. 
50, Larva of Beroé roseola. ga. Stomach. ocy. Otocyst. 
