Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 31 



anterior and is very convex dorsally; there are two incisions in this 

 joint at the basal lateral angle, another two near the distal angle and 

 one in the median distal margin ; these incisions and their attendant 

 depressions enhance the convexity of the distal portion of the carapace 

 and permit of its fitting into the molluscan shell. The lateral and 

 posterior margin of the proximal joint of the telson are sparsely setose, 

 and those of the distal joint are continuously fringed with setae. The 

 rhipidura have the basal joint, which arises from the proximal half of 

 the telson, curiously produced and curved, marked with a slight in- 

 cision at the base of the small branch, and with a deep, crooked 

 depression at the base of the larger branch. The smaller branch is 

 closely appressed to the basal joint and has its lower margin arcuate 

 and the upper one curved. The outer surface is covered with golden 

 yellow squamosities, similar to those on the propodus of the fourth 

 leg. The larger branch of the rhipidura has two tubercles near the 

 base, is elongated with the lower margin arcuate, and the upper 

 rounded. The outer surface of the distal part is covered with a plate 

 of golden yellow squamosities like those on the smaller branch. Both 

 branches are fringed with long, feather-like setae. 

 Synonymy. — Calcinus olscurus Schmitt (not Stimpson), Zoologica, 



N. Y. Zool. Soc, vol. 5, No. 15, p. 170, 1924. 

 Calcinus explorator Boone, Zoologica, N. Y. Zool. Soc, 1930 (in 



press). 



Subfamily : Eupagurinae. 



Genus: PAEAPAGUKUS Sydney I. Smith, 1874. 



Parapagurus pilosimanus abyssorum Henderson. 



Plate 4. 



Name : Abysmal anemone hermit. 



Diagnostic characters : This species is confined to the ocean abyss 

 and is almost invariably found in the association of the anemone which 

 invests the gastropod mollusk shell selected by the hermit as a home. 

 The most conspicuous characters of this hermit are the somewhat 

 square-shaped, decidedly calcified carapace and the exceedingly long 

 and slender ambulatory legs, the dactyli of which in some adult males 

 are longer than the entire body. 



Type : The type material of Parapagurus pilosimanus S. I. Smith 

 was taken ''probably on a trawl line, in 250 fms., hard bottom, off the 

 coast of Nova Scotia, nearly due south of Halifax, and was inhabiting 



