INTEKNAT. ANATOxAIY OF S(^UHJ.A. 
425 
Posteriorly to this opening the gland extends back on each 
side as a wide sac in close contact with the narrow intestine 
(wliich is thus effectively hidden from view), and gives off 
nuinerons lateral diverticula in its course. Tliese diverticula 
are somewhat narrow proximally but dilate and branch dis- 
tally; in the sixth abdominal segment they extend into the 
basal joints of the appendages borne on that somite, and they 
occupy the greater part of the cavity of the telson. Text-fig. 
9 represents on its left side a section passing through the 
a,nterior extremity of the opening of the pyloric gland into 
the stomach, which is thus seen to be narrow and ventro- 
lateral ; the right side of the same figure passes through the 
posterior extremity of the opening, which is thus evidently 
wide and lateral. Sections also show that the whole of the 
gland is enveloped in a lai’ge blood-sinus containing much 
blood. 
The cells of the digestive glands are of several kinds, the 
most noticeable being the ordinary granular cells [L. C.), cells 
wedged in between the ordinary cells and containing large 
vacuoles {G. C. ; these vacuoles burst into the gland cavity) and 
small cells with very large darkly-staining nuclei {S.L. C.). 
The Rectal Glands. 
The rectal glands are found in both sexes underlying the 
ramifications of the ‘Miver ” in the telson. They are two in 
number, are large, with spacious lumina, and open in the adult 
as in the larva (see Claus [5]), laterally at the posterior end 
of the rectum. In addition to these rectal glands there are 
present some small accessory tubules opening into the gut in 
the same region, which apparently bear some resemblance in 
structure to the urinary tubes of Amphipods. 
The mesenteron is very long in Squilla and extends from 
the stomach to the region of the anus, where the cuticle of 
the proctodmum becomes inturned for only a short distance. 
