16 C. BOVALLIUS. REMARKS ON THE GENUS CYSTEOSOMA. 
The pleon and urus together are as long as the five first 
pereional segments. The first pleonal segment is the longest 
longer than the last pereional (9: 7). 
The flagella of the pleopoda are longer than the peduncles. 
The segments of the urus are not carinated. 
The peduncles of the uropoda are thick, inflated, serrated 
along the margins, narrower than the length of the free ramus. 
The peduncles are not twice as long as the outer rami. 
The telson is rounded, broader than long. 
Colour. Hyaline, yellowish. . 
Lenght. 57 mm. 
Hab. Off the west coast of Australia. 
Only one specimen; it was taken by the Danish Captain 
ANDRÉA, and is preserved in the Zoological Museum of the 
Universty at Copenhagen. 
Explanation of the plate: 
Thaumatops Lovéni. N. sp. 
Fig. 1—14. 
1. The animal from the side. 
2. One of the first pair of antenn. 
3. > > > mandibles. 
4 » » > first pair of maxille. 
5 AN 00 second pair of” 
6. The maxillipeds. 
7. One of the first pair of pereiopoda. 
8. $$ + ,secand >) 3 > 
9. The metacarpus of the fourth pair of pereiopoda. 
10. » > > fÄfth > ES > 
11. > dactylus Ing > FE » 
12. > metacarpus > > seventh > >» » 
13. One of the first pair of pleopoda. 
14. The urus. 
Thaumatops longipes. N. sp. 
Fig. 15—23. 
15. The animal from the side. 
16. Öne of the first pair of antenn. 
ME AR > > > pereiopoda. 
18. >» 3 2 second» > » 
19. The metacarpus of the fourth pair of pereiopoda. 
205. P » » > sixth > > 
21. A branchial sack from the sixth pereional segment. 
22. The last joints of the seventh pair of pereiopoda. 
23. The urus. 
