284 ZOOLOGY: 
this position of the branchiae; in each segment it gives off a 
pair of lateral arteries, and in front it ends in ophthalmic and 
antennary arteries (Fig. 165). 
The liver extends into the abdomen, and is divided into 
ten pairs of caeca. <A pair of glandular diverticula open into 
the rectum near the anus; they are regarded as excretory. 
Fic. 165.—A Squilla mantis, with the 
shell removed from a portion of the 
dorsal surface to show the internal or- 
ganisation. After Leuckart and Nitsche. 
1. Ist pair of antennae. 
2, 2nd pair of antennae. 
21, Scale, exopodite, of 2nd antenna. 
3. 2nd maxillipede. 
4, Heart, with thirteen pairs of ostia, and 
numerous paired vessels supplying 
the limbs. 
5. Median unpaired vessel supplying the 
eyes and antennae, 
6. Ovary. 
7. Oviduct opening at base of (8) in Fig. 
164. 
8. Stomach, 
9, Liver diverticula from the intestine, 
these lie under the ovary. 
10. 6th abdominal appendage. 
The generative organs also lie in the abdomen, the oviducts, 
however, reaching into the three free thoracic segments, being 
situated between the alimentary canal and the heart. The 
vas deferens opens on the last pair of thoracic appendages, the 
oviduct on the last but two. An antennary gland does not 
appear to be present. 
Unlike most Crustacea, the Stomatopoda do not carry their 
eges about with them, but deposit them in the burrows in 
