226 J^otes on North American Crustacea. 



extus profundae ; angulo externo sat prominente ; lobo suborbitali valido, 

 prominente, superficie laevi, margine crenulato. Oculi magni, pedun- 

 culis gracilibus valde elongatis, corapressis ; corneis sat validis. Frons 

 inter bases oculorum perangusta, antice multo dilatata, margine undu- 

 lata, breviter cristata. Antennae et antennulae eis Podophthalmi similes. 

 Maxillipedes externi eis Luparum vix diversi, necnon mero oblique qua- 

 drate, vix longiore quam latiore, marginibus non incisis, angulo externo 

 late rotundato. Chelipedes longi, manu forte compressa. Pedes pos- 

 tici toti natatorii ; dactylis primi secundi tertiique paris late lauceolatis, 

 quarti paris ovatis. 



This very distinct and interesting new genus appears to be 

 nearest allied to PodophthalmuH^ which it resembles in the cha- 

 racters of the front, antennae, etc., and in the great development 

 of the eye pednncles, which is the most striking feature. But 

 the orbits are shorter than in that genus, and closed externally, 

 well surrounding the eye-bulbs when retracted. The carapax 

 also is very different in its rounded sides and want of spines. In 

 fact the general form resembles more that of some Lwpidae^ while 

 the character of the antero-lateral margin and feet recalls 

 Polybi'us. 



This is one of the very peculiar forms now so rapidly turning 

 up from the west coast of America. But one species is yet 

 known. 



Euphylax doTii, nov. sp. 



PI. V. fig. 5. 



Carapax transversely oval, one half broader than long, smooth and 

 glabrous, but minutely punctate, unevenly convex ; cardiac region more 

 protuberant than the gastric. Antero-lateral margin much shorter than the 

 postero-lateral, undulated and obscurely five-toothed, including the angle 

 of the orbit, which is much larger and more prominent than either of 

 the other teeth ; posterior tooth minute, subspiniform ; intermediate 

 ones very minute, indistinct, and unequally distant. Margins of orbit 

 crenulated. Suborbital lobe large and very prominent, with polished 



