68 Description of Genera ami Species. 



an orbital and an antennal spine. The postero-lateral angles are rounded oil. The 

 posterior margin is only slightly hollowed out, nevertheless it does not cover the dorsal 

 part of the last trunk segment. There is only a slight indication of a cervical fold, 

 and the only ornament is the narrow double border to the side lappets and the 

 posterior margin. The trunk segments are incomplete along the back, and, seen 

 sideways, they appear as wedges as in the former species. This is well shown in fig. 3, 

 where the carapace is broken away. 



The tail is incomplete and onl}' part of its six segments preserved, but it is 

 remarkably prawn-like, especially when seen in relief as in the specimen shown 

 in fig. 3. The first segment is short and deep, with deep narrow epimera pointed 

 downwards and l^ackwards, which are evidenth' overlapped by the posterior wings of 

 the carapace when the tail is folded up. The second segment is larger than the first, 

 and is provided with similar pointed epimera. and there is not so great a disparitj- in 

 size between those of the two segments as usual. The tliird segment is longer along 

 the line of the back than the second, and seen sideways is more wedge-shaped than it, 

 indicating that there was the same habit of arching the back as in AntJirarophausia 

 dunsiana. The epimera are also pointed and directed backwards. The next three 

 segments are incomplete, but sufiicient is shown to see that they diminish rapidly in 

 depth successively, showing that there was considerable taper of the tail. Sufiicient of 

 the epimera of the fourth and fifth segment are preserved to show that they were deep 

 and pointed and set backwards like the preceding ones. There appears to have been 

 a ridge along the back of the sixth segment. The only ornament on the segments are 

 slight transverse bands on the anterior parts of the tergites and the thickened facets on 

 the anterior edge of the epimera, which all overlap each other in the usual manner. 



The appendages of the trunk are not well preserved. The eye is of moderate size, 

 short stalked, and placed as in the former species. The peduncle of the antennule 

 seems to be about the same length as the rostrum, and gives off two lashes, but their 

 relative length has not been observed. The antenna has the basal scale of the same 

 caridean type as in the former species. The fiagellum is massive, and the peduncles 

 shorter than the scale. The bodies of the mandibles are preserved in situ in the 

 specimen that fig. 3 is taken from. The specimen is preserved uncompressed in a 

 calcareous nodule. The bodies are tumid and massive, but the molar and biting parts 

 are not exposed. The long basal joint of the palp of the mandible is seen outside the 

 form, and appears to be much as in the other species. 



The maxilte have not been observed, but two joints of the massive eudopodite of 

 the maxillipede are seen in fig. 3. The long joint of the limb is massive, carinated 



