410 GILMAN A. DREW 
the position of the opening from the side of this gland. This 
opening communicates with a complicated portion in which 
the spermatophore is completed. Marchand calls this (appen- 
dix) the blind sae of the distal vas deferens. It is not a true 
blind sac, as it has two openings, and the term appendix, which 
has been applied by other writers, has no meaning. I will call 
this (figs. 29 to 32, FG) the finishing gland. In passing the oral 
end of the spermatophore from the outer tunic gland into the 
opening of the duct leading to the finishing gland (fig. 32, FD) 
this end of the spermatophore is considerably folded, and, as 
the further movement is now with this end directed forward, 
the folds are held and compressed while the outer tunic hardens. 
around them. 
Just how much of the gland is responsible for the formation 
of the outer tunic is uncertain, but judging from the structure 
of the gland, the appearance of the tunic as seen in sections, and 
the appearance of spermatophores removed from the gland, 
I am inclined to think that the whole structure, from the end 
of the middle tunic gland to the end which extends into the 
hardening gland, is very active and that the duct leading from 
this portion to the finishing gland, the finishing gland duct, 
and the finishing gland itself, adds to the outer tunic over the 
oral end of the spermatophore. 
Spermatophores taken from this position in the organ exhibit 
great differences in the appearance of the oral ends, and, as 
spermatophores. are common in this position, the meaning 
probably is that the spermatophore is held here until the oral 
end is shaped and covered. It is then passed, oral end first, 
down the duct to the pointed end of the finishing gland. 
The duct to the finishing gland is much larger than the lumen 
of the outer tunic gland and has a very definite groove along 
the side away from the visceral mass, which ends on the side 
of the finishing gland in a pouch (figs. 29 to 32, PF). The 
spermatophore usually lies in the part of the duct away from this 
groove and pouch, but in a few cases I have found the oral end 
of the spermatophore in this pouch. This position may not 
have been normal, for, in opened animals, the mechanism con- . 
