224 
C. BADHAM. 
McMurricli (2) gives a useful account of the conchula in 
the various species of Peachia. In the larva of P. hi lli 
the peripheral ends of the lips of the siplionoglyph project 
as a pair of small processes (Text-fig. 2, S. 1.), while from the 
base of the external opening there projects a median lobe. 
In this manner the conchula presents a simple three-lobed 
Text-fig 1. 
Drawing of a fully-extended, living larval specimen of Peachia 
liilli (x 1|). The subject has been kept detached from its 
host for a few days and the conchula (C.) is somewhat con- 
tracted. The oesophageal folds and the character of the 
tentacles are seen. The grooves on the surface of the body 
are clearly shown and some of the pores of the physa. The 
trilobed character of the conchula is evident. 
structure, such as appears to be the basis of the conchula of 
all species of the genus Peachia. Haddon (6), writing* 
of P. hastata, says that the conchula varies greatly in 
complexity, but that “ one basal, and two lateral lobes may 
