528 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.50. 



Especially noteworthy are the number of large, circular forms of 

 Inachinic, the great variety of Hyastenus, and the occurrence of a 

 species of AntiUMnia, a genus known previously from a single South 

 African species. 



All measurements are in millimeters. 



Family INACHID.^1 



Subfamily IlS^^CIIl^^r.gI:. 

 ACH^US VILLOSUS, new species. 



Type-locality.— on Jolo: Jolo Light, S. 51° W., S.G miles; lat. 6° 

 Of/ N.; long. 121° 02' 30" E.; 20 fathoms; co. S.; Feb. 14, 1908; 

 station 5139, Alhatross. 



Uolotype.—M^\Q, soft shell. Cat. No. 48207, U.S.N.M. 



Measurements. — Approximate. Entire length of carapace, 8.3 

 width of same, 6.G; length of rostrum, from front edge of orbit, 0.7 

 free portion of antenna, 3.7; length of hand, 3; width of same, 2 

 length of first walking leg, 30 ; merus, 10 ; carpus, 3.8 ; propodus, 9.5 

 dactylus, 4.3; second walking leg, 28.7; merus, 10.3; carpus, 3.4 

 propodus, 7.8 ; dactylus, 5 ; third walking leg, 23 ; merus, 8 ; carpus, 

 3; propodus, 5.6; dactylus, 4.4. 



Carapace covered with soft hairs, mostly straight, a band of 

 curved hairs on either side extending from the ends of the posterior 

 margin to the orbit. Regions deeply separated and without spines 

 or tubercles. Rostrum with a deep median groove, tip subtruncate, 

 with a slight notch. Constriction behind eyes very short, hepatic 

 region projecting almost at once. 



Basal antennal segment bowed outward, ventral surface spinulous, 

 second segment nearly as long as third and a little stouter. A 

 spinule above eye at extremity. 



Chelipeds covered with two sorts of hair, of Avhich the curved 

 ones are mostly on the surfaces and the straight ones on the margins ; 

 merus joints swollen, margins spinulous; palms swollen, fingers a 

 little longer than upper margin of palm; fingers gaping and irreg- 

 ularly dentate for the basal three-fifths. Dactylus of first leg 

 straight or nearly so, of second leg slightly curved, of third leg a 

 little more curved, fourth leg unknown. 



Relationship. — In the smoothness of the carapace, this species is 

 related to A. japonicus.^ The general shape is the same except for 

 the absence of a "neck" in viUosus, the supra-orbital hood being 

 close to the hepatic protuberance. In japonicus the third leg has a 

 more strongly curved dactylus. 



1 Inachus (Achacus) japonicus de Ilaan, Fauna Japon., Crust., 1839, p. 99, pi. 20, 

 fig. 3 ; pi. H. 



