of the Pacific Shores of North America. 451 



habits deep water on the coast of Oregon, where it was 

 found by the U. S. Exploring Expedition. 

 Mus. Expl. Expedition. 



HERBSTIA PARVIFRONS. Randall. 



Herbstia parvifrons, Randall ; Journal of the Academy of Natural Sciences of 

 Philadelphia, viii. 107. Gibbes ; Proceedings of the American Association for the 

 Advancement of Science, 1850, p. 170. 



" Western America." (Nuttall.) This species I have 

 not seen. 



LOXORHYNCHUS. nov. gen. 



Carapax pyriformis, plus minusve spinosus et pubescens ; regione stomachali 

 ampla, convexa ; regionibus hepaticis parvis, prominentibus, spina una saltern 

 valida in medio armatis. Rostrum bifidum, plus minusve deflexum ; cornu- 

 bus divaricatis. Orbita imperfecta, supra infraque sinu profundo longitudinali 

 interrupta; cavo pediculi subtubulato. Oculi sat breves, retractiles, non sese 

 latentes. Dens praeorbitalis validus ; spina postorbitalis acuta, fere longitu- 

 dinalis, sub qua spina parva juxta basim externam articuli primi antennae 

 externas sita. Pars mobilis antennarum externarum rostro vix celata, flagel 

 lis longis ; articulus immobilis latus, fere quadratus, apice externo spina acuta 

 lateraliter porrecta armato. Epistoma magna, subtrapezoidalis. Maxillipedes 

 externi fere ut in Pisa ; apice interno articuli secundi valde producta et rotun- 

 data. Pedes subcylindrici, secundi paris longiores ; tarsi breves non spinulosis 

 digiti primi paris maris fasmineeque margine interno toto denticulate Abdo- 

 men 7-articulatum. 



This genus is proposed for the reception of two new 

 species of Maioid crabs, which, though differing from each 

 other considerably in the characters of the surface of the 

 carapax, and some other points, yet are so closely allied in 

 the structure of the orbits and antenna? that they cannot be 

 generically separated. They unite the characters of several 

 generic groups, so that their position is somewhat doubtful, 

 although probably among the Pisince. The deflection of 

 the rostrum is quite characteristic, but this feature is much 

 less developed in one species than in the other. The eyes 

 are short, and do not reach the tip of the post-orbital spine. 



