722 MR. s. KEMP OX DECAPOD [June 15, 



and infra-antennary angles are strongly acute and a very small 

 bi-anchiostegal spine is present. The distance between the 

 cervical and post- cervical grooves, measured dorsally, is about 

 one-third the distance from the post- cervical groove to the hinder 

 edge of the carapace. The mid-doi-sal carina is not evident 

 behind the latter groove. 



The eyes are in very poor condition, one missing and the 

 other badly damaged. The second joint of the antennular 

 peduncle is ver}^ short ; measured dorsally it is less than half the 

 length of the ultimate segment. The antennal scale (PI. LXXIII. 

 fig. 4) is three times as long as broad and not much narrowed 

 apically ; the convex outer margin terminates in a minute spine, 

 which hardly extends as far forward as the lamella. 



The ultimate joint of the mandibular palp (PI. LXXIII. fig. 5) 

 is fully as long as the width of the first joint. In the second 

 maxilla the anterior lobe of the internal lacinia is not constricted 

 behind its apex and is not nai'rower than the adjacent lobe of the 

 external lacinia. In the latter lacinia the anterior lobe is about 

 one and a half times the width of the posterior. The endopod 

 (PI. LXXIII. fig. 2) is furnished with two stout curved spines 

 behind the apex, beyond which the narrow distal prolongation 

 bears four setse on the inner margin. The endopod of the first 

 maxillipede reaches slightly beyond the exopod. The third seg- 

 ment is one and a quarter times the length of the second ; the 

 fourth segment is extremely minute. Three stiff curved spines 

 are situated on the inner distal margin of the basal joint. In the 

 second maxillipede the merus (PI. LXXIII. fig. 3) is rather less 

 than twice as long as broad ; its anterior prolongation (?'. e. the 

 portion extending beyond the insertion of the carpus) is about 

 one-third the total length of the segment. 



The first pair of pereiopods is missing. In the second pair the 

 carpus is nearly half as long again as the chela, and the dactylus 

 is distinctly shorter than the palm. The carpus of the third pair 

 is exactly the same length as the merus and more than twice the 

 length of the chela ; the dactylus is slightly shorter than the 

 palm. 



The abdomen is cai^nate only on the sixth somite and the median 

 spines on the sterna are all very blunt and inconspicuous. On 

 the lower margin of the telson there are basally two rounded 

 lobes. The apex (PI. LXXIII. fig. 6) is rather broad and convex. 

 A short stout spine marks each outer angle ; between these there 

 a^^e nine plumose setse of which the middle one is the longest. 



The petasma is veiy complex ; its numerous lobes and folds are 

 shown in PI. LXXY. fig. 1. 



This species bears a close superficial resemblance to Amalo- 

 penceuseleyans*. Apart from the generic character — the presence 



* My statement (Fisheries, Ireland, Sci. Invest, for 1905, V. 1906) ihntG-. parvus 

 and A. elegans are synonymous I now regard as erroneous. The mistake is probably 

 traceable to the close resemblance of the two forms and to the fact that an authentic 

 example of A. eleqans occurs in the collection under the name of (?. partmn. 



