122 
SIDNEY E. HARMED. 
On dividing a Phoronis transversely with a pair of 
scissors Schultz found that regeneration took place readily in 
both the pieces thus separated. Although he did not deter- 
mine the minimal size of the fragments which were capable of 
regeneration , he states that this process occurred, in both the 
proximal and the distal portions, wherever the cut was made. 
The distal portion regenerates a proximal end, for instance, 
even if the part separated consists only of the lopliophore and 
a part of the body containing the commencement of the 
oesophagus and the extreme end of the rectum. The proximal 
portion regenerates a new distal end whether the cut be made 
through the commencement of the oesophagus, or at practi- 
cally any lower level, while the distal end regenerates a new 
proximal end with a similar disregard of the region where the 
section has been made. The details of the process of 
regeneration are described. 
In a later paper (1903 2 ) Schultz shows that regeneration 
takes place in the Actinotrocha larva of Phoronis, similarly 
divided by transverse cuts, although it proceeds at a much 
slower rate than in the adult animal. 
None of the papers so far quoted contain any suggestion 
that the regeneration in Phoronis may be associated with a 
process of reproduction by fission. 
In his monograph of the Phoronidea of the Gulf of Naples 
(1907, pp. 161—) de Selys-Longcliamps gives further infor- 
mation with regard to the regeneration of species of this 
group. No evidence was obtained that the lophophoral end 
spontaneously thrown off was capable of regeneration. The 
lophopliore may be' thrown off several times in succession by 
the same individual, which regenerates this portion after each 
reduction. The proximal end of the body, or “ ampulla,” is 
incapable of regeneration, a process which appears to be con- 
fined to the muscular region. On cutting this part, in P. 
psammophila, into six pieces of approximately equal size,, 
each of these pieces regenerated so as to become a complete 
individual, while the lophopliore and the ampulla did not 
regenerate. Fragments hardly longer than wide in which tho 
