ON THE ANASPIDACKA, LIVING AND FOSSIN. 37 
eland-cells are concentrated, while in the Hucarida and 
Anaspides the gland-cells are distributed about among the 
absorptive cells. 
On the whole, therefore, the alimentary tract of Anas- 
pides, while showing certain peculiar features, points to 
Eucaridan and especially Decapodan affinities. 
(c) Excretory System. 
The excretory organ of Anaspidesis situated at the base of 
the second maxilla; it is a maxillary gland. We can dis- 
tinguish four chief regions: (1) A straight excretory duct 
with rather thick walls and darkly staining somewhat flattened 
nuclei (Pl. 12, fig. 10). This duct passes into the base 
of the second maxilla on each side and opens by a pore on 
the external border of the appendage. (2) The excretory 
duct passes internally into a coiled excretory tube with 
striated walls and greatly flattened darkly staining nuclei 
(Pl. 12, fig. 11). (8) This coiled tube passes insensibly into 
another coiled tube with an epithelium of a more glandular 
nature and with oval nuclei containing granules of chromatin 
(Pl. 12, fig. 12). The cytoplasm of these cells is more 
granular but has a faintly striated appearance. (4) The 
glandular tube is coiled into an expanded sac, the end-sac 
into which it opens. ‘The end-sac is lined with a flattened 
epithelium, the cells of which contain globules of a yellowish 
colour (PI. 12, fig. 18). 
The presence of a maxillary gland, and the entire absence 
of an antennary gland, is only found elsewhere in the 
Malacostraca among certain Isopods and in Nebalia. It is 
unknown either in the “ Schizopoda” or Decapoda. 
(p) Reproductive Organs. 
Female.—The external sexual characters of the female, 
together with the spermatheca, have been described (pp. 
516-518). The ovary of an adult Anaspides is a lobed 
