400 
Th e Sell izorjregarines 
Host 
Habitat 
Parasite 
Remarks 
Doclecaceria coneharum 
Gut 
S. echinatum, C. & M.*, 1899 
Gametoeyst and sporocysts 
known 
Nerine sp. 
9 9 
S. pendula, Giard, 1884 
Type species; coelomic habitat 
first given is incorrect 
Nerine cirratulus 
9 9 
S. pendula in C. & M., 1899 
C. <fc M. showed type-species 
is intestinal 
Phyllodoce sp. 
99 
Selenidium sp., Claparede, 1861 
Poly cirrus aurantiacus 
9 9 
Selenidium spp., Fantham, 1908 
Original observation 
Polydora coeca 
9 9 
Selenidium sp., C. & M., 1899 
Polydora flava 
9 9 
Selenidium sp., C. & M., 1899 
Pomatoceros triqueter 
9 9 
Selenidium sp., C. & M., 1899 
Polymnia nebulosa 
9 9 
S. costatum, Siedlecki, 1903 
Also said to occur in coelom, 
rarely 
Protula tubularia 
9 9 
Selenidium caulleryi, Brasil, 1907 
Schizogony described in detail 
Pygospio seticornis 
99 
Selenidium sp., C. & M., 1899 
Sabella spp. 
99 
S. sabellae, Lank., 1863 
Salmacina dysteri 
99 
Selenidium sp., C. & M., 1905 
Scolelepis fuliginosa 
9 9 
Selenidium spp., C. & M., 1899, 1901 
Two species, one with single 
myoneme in which schizo¬ 
gony is known ; the other 
with numerous myonemes 
Scoloplos muelleri 
9 9 
Selenidium sp., C. & M., 1899 
Serpula contortuplicata 
9 9 
S. serpulae, Lank., 1863 
Spio fuliginosus 
9 9 
S. spionis, Kolliker, 1845 
Spio calcarea 
99 
S. spionis, Leger, 1892 
Notified by L6ger as a Platy- 
cystis 
Spio martinensis 
9 9 
S. spionis, Kolliker, 1845 
Sipunculus nudus 
9 9 
S. sipunculi, Dogiel, 1907 
The original account of schi¬ 
zogony is probably incorrect 
Petalostoma minutum 
9 9 
Selenidium sp., Brasil, 1907 
Phascolosoma vulgare | 
Selenidiidae 2 spp., Brasil & 
Schizogony and encystment 
Phascolosoma elongatum f 
9 9 
Fantham, 1907 
known 
* C. & M. = Caullery and Mesnil. 
4. Family Merogregarinidae, Porter. 
Trophozoite non-septate, ovoid, with a small, definite epimerite 
shaped like the head of a lance. Myonemes restricted to the anterior, 
pre-nuclear region. Schizogony intracellular. Sporogony known in 
part. Spores octozoic. 
One genus. 
(1) Genus Merogregarina, Porter. 
Schizont intracellular, uninucleate during growth, becoming multi- 
nucleate at the end of its growth. Number of merozoites produced 
