20 SYNONYMY OF PHERECARDIA LOBATA, 
they consist of a dichotomously branched stem, situated 
behind and at the median side of the dorsal bristle-fascicle. 
The prostomium has a syncipital region, that is some- 
what rectangular with rounded lateral sides, bearing four 
large indistinct violet eyes, the posterior of which are the 
largest; from its middle the stout unpaired antenna, that 
measures half the length of the caruncle, arises. In front 
of it lies the palpar region, emarginated in the shape of 
a V, with two small paired antennae on each side !). 
Malaquin and Dehorne describe this part of the head as 
four-lobed; perhaps this was caused by the state of con- 
traction of the animal. 
The large heart-shaped caruncle covers the total dorsal 
side of the four anterior segments and extends till upon 
the fifth one. Like in Hermodice it consists of a median 
axis and a number of lateral lamellae, that are however 
directed backward and not forward like in that genus. The 
axis is a wedge-shaped ridge, with crenulated borders, that 
is provided on each side with 10 or 11 Jamelliform appen- 
dages; these lamellae have both sides furnished with pa- 
rallel vertical folds. In the specimen, examined by Malaquin 
and Dehorne, these folds are described as branched ridges; 
I dare not state whether this must be considered as a spe- 
cific character, or if it may represent an abnormality, be- 
cause their specimen bears another small superfluous ca- 
runcle at the right side of the median axis. 
The mouth appears to be bounded laterally and poste- 
riorly by the anterior four segments *). The anus is a 
1) According to Racovitza (Arch. Zool. Expér. 3e sér. vol. IV) in Zwrythoë 
and Euphrosyne the anterior pair of antennae should represent the stylodes 
of the palpi; Malaquin and Dehorne however demonstrated, that this does 
not hold for Notopygos and Pherecardia (Eucarunculata), in which the organs 
are independent from the palpi and innerved from the dorsal side of the 
encephalon. 
2) [ do not understand why Racovitza (loc. cit. p. 184) disapproves this 
Manner of expression of systematical Annelidologists, for, though in Amphi- 
nomidae as in other Annelids the roof of the mouth-cavity may be formed 
by the first (buccal) segment, yet he cannot deny that in this family also other 
segments take part in the external bordering of the mouth-opening. 
Notes from the Leyden Museum, Vol. XXXIV. 
