ART. 4 LYSIAliTASSID AMPHIPOD CEUSTACEAlSrS SHOEMAKEE 13 



with nine stout serrate spine-teeth, palp normal. Maxilla 2 normal. 



Maxillipeds, inner plate bearing three low teeth and a few spines on 

 truncated end, outer plate narrow, reaching end of second joint of 

 palp, bearing seven minute teeth on inner edge and two at the round- 

 ing apex, palp short, fourth joint bearing a minute nail with a seta 

 on outer edge just beyond the center. First four side plates much 

 deeper than their segments, first not expanded below and with lower 

 anterior corner broadly rounding. Gnathopod 1, second joint rather 

 stout, fifth and sixth subequal in length, fifth with lobe broad and 

 very slightly produced, sixth slightly narrowing distally, palm trans- 

 verse, defined by small tooth, slightly convex and finely dentate 

 throughout, seventh joint stout, curved to fit palm and not over- 

 lapping. Gnathopod 2, sixth joint not quite two-thirds the length 

 of fifth, palm slightly produced. Peraeopods 1 and 2 subequal in 

 length and normal. Side plate 4 deeply excavate with posterior lobe 

 broadly rounding. Peraeopod 3, side plate much deeper than second 

 joint, which is broadly expanded, fourth joint broadly expanded. 

 Peraeopod 4 longer than 3 or 5, side plate not as wide or as deep as 

 second joint, which is not so greatly expanded as that of peraeopods 

 3 or 5, fourth joint not greatly expanded. Peraeopod 5, second joint 

 much deeper than side plate and greatly expanded, fourth joint little 

 expanded. Pleon segment 3 with postero-lateral margin slightly 

 convex, postero-lateral angle very narrowly rounded but not pro- 

 duced. Pleon segment 4 with shallow sinus followed by a low, 

 rounding, dorsal process. Uropod 1 projecting farther back than 

 2 or 3 which extend back equally. Uropod 3, outer ramus slightly 

 longer than peduncle, inner ramus about as long as first joint of 

 outer ramus and equaling it in width. Telson reaching back slightly 

 beyond peduncle of uropod 3, divided nearly to center, lobes only 

 slightly gaping, rounding apically, and each bearing a terminal 

 spinule, a single spinule about the center of either lateral margin. 



Length. — 8 mm. 



Type.—QdX. No. 62727, U.S.N.M., Bay of Fundy, taken by the 

 U. S. Fish Commission in 1872. Two other specimens are in the lot 

 from which the type was taken, and another lot of seven specimens 

 bears the same locality label. Bay of Fundy, U. S. Fish Commission, 

 1872. 



OKCHOMENE MACSOSERRATA. new species 



Description. — Fetnale. — Head, lateral angles prominent with apices 

 rather broadly rounding, eyes pear-shaped, black. Antenna 1 with 

 four to nine joints in flagellum, accessory flagellum with four or five 

 joints. Antenna 2, flagellum about as long as fourth and fifth joints 



