MONILIGASTER GRANDIS, A. G. B. 373 
M. rubra, A. G. B., 1886. 
I can, unfortunately, give no further details here with 
regard to this species. For the present I merely place a figure 
of it on record. 
I now give, as far as information is available, diagnoses in 
the form I have adopted above of the species which have 
been previously described by others. 
M. deshayesi, Perrier (1), 1872. 
Size, 150 mm. long (Perrier), “‘ largeur 6 mm.” 
Nephridiopores in the direction of the outer seta row. 
Male pores between the outer and inner seta rows. 
Spermathecopores in the direction of the inner seta rows. 
Gizzard in three or four lobes, apparently occupying about 
Segments x1v—xvi._ Perrier describes also an anterior gizzard. 
Habitat.—Ceylon. 
M. barwelli, Beddard (2), 1886. 
Size, about 40—50 mm. long. 
- Pigment, very little present in the body-wall. 
Spermathecopores in the direction of the outer seta row. 
Prostates oval. 
Gizzard in four lobes. 
Habitat.—Manila. 
M. houteni, Horst (4), 1887. 
Size! probably about 820 mm. long, about 55 mm. in cir- 
cumference. 
Segments, 443. 
Setz 1 mm. long ; ventral gap twice the length of a lateral . 
Sap. 
1 Horst gives the length as 1500 mm., and the greatest circumference as 
about 55 mm. From experiments with poorly-preserved M. grandis I 
calculate that the natural length of M. houteni, when living and at rest, 
would not be less than 820 mm., a greater length than M. grandis ever 
attains. The circumference, where it is greatest, viz. in the anterior 
region, does not vary to any appreciable extent with the state of preservation 
and extension, as it depends upon the size of the sperm-sacs, &c. 
