Orttstacba. 



461 



row of spines or tubercles ; terminal portion of the walking legs 

 short and pointed. 



No British example of this species has hitherto been known ; 

 but a specimen has come to my hands that belongs to this 

 section, though I have not been able to refer it to any known 

 species. 



It was found in a crab pot in June, 1837, and though of smaU. 

 size, appearing to the fisherman to be of rare occurrence, it was 

 reserved for my inspection. It was scarcely the fourth of an 

 inch across the carapace, the form and and colour resembling 

 those of the common edible crab, but the antennae were covered 

 with small wavy protuberances. On the margin between the 

 ocular cavities were five segments (lobes) the central most pro- 

 jecting ; on the lateral margin were nine crenations, each, as 

 those between the eyes, distinctly but finely notched. Antennae, 

 small, fine, simple, and with the palpi resembling those of the 

 common crab. Hand claws and walking legs short, the two 

 outer segments (joints) with a serrated crest, and the finger also 

 notched at its root, walking legs with short bristles. 



It may be that it is not uncommon, as its small size may easily 

 cause it to be overlooked." 



Most probably this is the young of some known species. I 

 am not aware that it has been seen by any one but Mr. Couch. 

 Bell does not notice it. It appears to me to resemble Pilumnoides 

 of Edwards and Lucas. 



Genus, Piltjmnus. 

 Second portion of the outer antennae placed in the inner can- 

 thus of the orbit, and extending beyond the front. Carapace 

 rounded over the summit and without lines. 



PiLTjMNTJS HiETELLUS. — Furry pilumnus. — Leach, Malac. Brit., t. 

 12; Milne Eww arch Hist, des Crust., t. 1, p. 417; Pennant, 

 pi. %,fig. 11. 

 " Common under stones at low water." 



This appears to be a widely extended species, having been 

 found, according to Bell, in Mediterranean, Eed Sea, East Indies, 

 and other parts of the coast of Asia, Australia, and both Eastern 

 and Western coasts of South America. 



