246 Mr. G. Lewis on 



recognized by the characteristic formation of the terminal 

 portion of the pleon ; it differs from G. damnomensis, Stebbmg, 

 in liaving a flat expansion to the bases of the third pereiopod 

 and in having the apex of the inner plates of the maxillipeds 

 truncate; in the latter point and in some others it agrees 

 with the new genus Paracyproidea, 8tebbing,_but it appears 

 to differ from this genus in the form and size of the telson. 



EXPLANATION OF PLATE V. 



Fig. ] . Cyproidia otakmsis. X 24. 



Fiy. 1 a. s. Superior antenna. 



Fi'ff. 1 «. i- Inferior antenna. 



Fi(/. If/n. 1. First gnathopod. 



Fi}/. 1 (/n. 2. Second gnathopod. 



Fu/. 1 ;»7-i. 1-5. First to fiftli pereiopods. 



Fu/. 1 ur. 3 & T. Third uropod and telsou, side view. 



(All the details highly magnified.) 



XXXIII. — On new Species q/ Histeridoe and Notices of 

 others. By G. Lewis, F.L.S. 



[Conckided from p. 234.] 



Hister lavimargo^ sp. n. 



Ovalis, parum convexus, niger, iiitidus ; frontc stria Integra, supra 

 oculos angulata ; tliorace stria interna basi vix abbreviata; elytris 

 striis 1-4 integris, 5 et sutm-ali apicalibus, suturali longiore ; 

 propygidio postice dense punctate, basi margineque laterali late 

 IjBvibus ; prosterno bistriato ; mesosterno leviter emargiuato, 

 stria marginali Integra; tibiis anticis 3-dentatis. 



L. 4i mill. 



Oval, rather convex, black and shining ; the head, frontal 

 stria well-marked, sinuous behind the mandibles^ angulate 

 above the eyes ; the thorax, marginal stria very fine, con- 

 spicuous at the anterior angles only, ceasing behind the eyes, 

 lateral stria almost complete, but a little shortened before the 

 base, feebly bisinuous behind the neck ; the elytra, striae 1-4 

 complete, 5 apical, sutural dimidiate and apically turning 

 slightly away from the suture, the humeral strise are absent 

 except a very fine oblique stria joined to the first dorsal stria 

 at its base ; the propygidium is densely punctured trans- 

 versely behind, the punctures leave a broad smooth margin 

 at the base and sides, the sides being clearly elevated ; the 



