REPORT ON THE CRUSTACEA MACRURA. G27 



Pandalxypsis, n. gen. (A. Milne-Edwards in lit/.). 



Like Pandcdus, but having the first pair of antennas twice the length of the 

 carapace. 



Chlovotocus, A. Milne-Edwards. 



Carapace smooth, dorsally carinate. Frontal crest and rostrum serrate above 



and below. 

 Second pair of pereiopoda having the carpos Particulate, and uniform in length. 



Dorodotes, n. gen. 



Like Chlorotocus, but having the carpos of the secondpair of pereiopoda six- 

 articulate. 



Heterocarpits, A. Milne-Edwards. 

 ffetewcwpus, A. Milne-Edwards, Ann. d. Sci. Xafc., ser. 6, t. xi. art. 4, p. 8, 1881. 



The carapace is laterally compressed, dorsally carinated, anteriorly elevated into a 

 crest, and produced to a long rostrum that is generally armed with teeth on the upper 

 and lower margins. The lateral surface of the carapace is traversed longitudinally by 

 two or more carinas. On the ventral surface of the sixth somite of the pereion there are 

 two small processes. 



The pleon is generally laterally compressed, frequently carinated, and dorsally armed 

 on some one or more of the somites with denticular processes, but there are never any on 

 the sixth somite, which is constantly smooth and short and produced posteriorly on 

 each side at the base of the telson to small sharp teeth. 



The telson is long and laterally compressed, and has the longitudinal dorsolateral 

 angle reduced by the lateral compression, and is generally armed with small spines, 

 ecpiidistant from each other but varying in number. 



The ophthalmopoda are short, and the ophthalmus is orbicular. 



The first pair of antennas has the peduncle short, the first joint being furnished with 

 a pointed stylocerite, and terminating in two long and slender flagella, the outer of 

 which, especially in the males, is the more robust for a considerable distance, and then 

 suddenly narrows to the diameter of the inner branch ; the latter is the longer, but both 

 only reach a little beyond the distal extremity of the rostrum. 



The second pair of antennas carrying at the anterior and inner angle of the first or 

 coxal joint a long and narrow phymacerite, the external orifice of the green gland. The 

 second joint is produced to a sharp tooth on the inner anterior margin, and there is 



