THE ENTEROPNEUSTA. 
TABLE 14, 
675 










Pt. flava, var. laccadivensis. 
| | | 
| No. of Length Tongue bars No. of Length Tongue bars 
tongue ee in mm. | per mm. | tongue bars | in mm. per mm. 
— I | | = 
104 10) he pea he 9°5 | 58 
98 18 54 || 52 10 5:2 
83 14 59 || 50 95 53 
79 14 56 50 9°5 53 
74 15 49 || 49 8 61 
71 135 53 || 48 9 | 8 
70 45 | 48 || 48 75 6-4 
66 reed ese eae jee 8 59 
64 10 64 || 40 ii 57 
| 62 120s eet: 2a | 20 7 See 
62 ul 56 || 38 6 63 
59 10 59 34 55 62 | 
57 10 57 || 32 5:5 58 
Be ro 56 || 30 45 66 
Average | 71:8 31 | 55 || 438 76 58 


EXPLANATION OF PLATES. 
advehent vessel of proboscis. 
anterior neuropore, 
basement membrane. 
branchial pouch. 
blood vessel. 
collar coelom. 
= collar canal. 
= chondroid tissue. 
central lumen of stomochord. 
cornua of nuchal skeleton. 
nuchal collar coelom (containing muscles). 
connective tissue. 
vascular ring of collar. 
dorsal nerve. 
dorsal proboscis coelom. 
dorsal septum, 
dorsal vessel. 
external longitudinal muscles of collar. 
efferent proboscis vessel. 
= gonad. 
ganglion cells. 
ged. 
gen. 
glo. 
gpl. 
il. 
int. 
Ide. 
7. 
lm. 
ls. 
lu. 
me. 
mdv. 
ml. 
mle. 
mld. 
ml. 
mlv. 
n. 
ngl. 
dorsal ganglion cells of collar cord. 
ventral ganglion cells of collar cord, 
gland cells. 
glomerulus. 
Ist gill pouch diverticulum. 
internal longitudinal muscles of collar. 
intestine. 
left diverticulum of dorsal proboscis coelom. 
lateral lumen of stomochord. 
longitudinal muscles. 
lateral septum. 
lumen of collar cord. 
circular muscles, 
dorso-ventral muscles. 
longitudinal muscles. 
longitudinal muscles of collar. 
longitudinal dorsal muscles. 
longitudinal lateral muscles. 
longitudinal ventral muscles. 
nuchal skeleton. 
gland cells of collar cord. 
