136 
Rev. A. M. Norman on two 
animal itself, but the exact proportionate size of the two un¬ 
equally developed buds show the closest correspondence. 
There is nothing to alter in, though much, of course, might 
be added to, the description I gave of these animals, and which 
I have quoted above, except to substitute the word Loxosoma, 
for u tentacular appendages.” In the description of the 
plate the following corrections will make the figures intel¬ 
ligible :— 
Fig. 1. Phascolosoma Harveii, Forbes*, slightly enlarged, 
with a tuft of Loxosoma phascolosomatum, Vogt, in situ at the 
posterior extremity. 
Fig. 2. A fully developed Loxosoma. a, the 11 opening into 
the interior.” Around this in the figure will be seen conver¬ 
ginglines, which, under the condition in which the animal was 
when examined by me, appeared to be only rugse of contrac¬ 
tion ; but these lines, it is now evident, represent the re¬ 
tracted lophophore. b and c u supplemental processes,” as I 
called them, are two buds in different degrees of development. 
In the state in which they were examined by me no trace of 
internal structure could be satisfactorily made out, so as to 
lead to the slightest suspicion as to their real nature. Vogt 
says, u there are never more than two buds f, and they are 
always unequally developed.” 
Fig. 3. This figure, I now take it, was drawn from a male 
(as figure 2 was from a female) specimen. Compared with 
figures 3 and 4 of Vogt, it seems tolerably clear thaty repre¬ 
sents the anal aperture, that d and e are what Vogt calls the 
testicles, while below these is seen the reniform space which 
Vogt considers to be occupied by the stomach and hepatic 
cells. 
Now that the attention of our marine zoologists is called to 
the subject, it is probable that before long this Loxosoma will 
be rediscovered ; and, no doubt, several other species of these 
semiparasitic Polyzoa will be found in our seas. They should 
be especially looked for on the Annelida, also on Hydrozoa, 
Sponges, &c. 
It may perhaps be useful if I add here a list of species 
already discovered as far as known to me. 
* Syrinx Harveii, Forbes, =Sijmnculm obscurus, Quat ., = Phascolosoma 
margaritacenm, Keferstein (nee M. Sars), = Phascolosoma luteum , Tlieel, = 
Phascolosoma Harveii, K. & 1). This is the synonymy of the species as 
given by Koren and Danielssen in their ‘ Fauna Littoralis Norvegiaj,’ 
3 die Hefte, 1877, pp. 136 and 164; and, having examined the several 
authors’ works, I believe it to be correct, except that I should put ? before 
the Sipunculus obscurus of Quatrefages. 
t Other known species have many buds developing at the same time. 
