32 PROCEEDINGS OF THE AMERICAN ACADEMY 



Styli caudales brevissimi. [Abdomen 2-articulatum, segmento secundo 

 brevi.] 



Long. \". — Hah. in mari " Sulu " ; lect. die 27 Jan., 1842. 



18. PoNTELLA PERSPiCAX. — Frons rotundata. Cephalothorax 6-ar- 

 ticulatus, capita discrete, segmento postico non breviore, angulis posti- 

 cis longe acutis. Oculi inferiores grandes et prorsum valde elongati. 

 Antennse anticae corpore valde breviores, 100° - 110° divaricatfe, ferme 

 21-articulatce, ante medium obsolete flexee. Styli caudales elongati. 

 Antenna antica dextra maris 9- 10-articulata,.articulo quarto lato, sub- 

 ovato. Pes posticus dexter vix crassus ; manu angusta, breviuscula, 

 digito vix longiore acuminate, pollice setiformi, longissimo, reflexo. 

 [Abdomen 5-articulatum.] 



Long. xV"' — ^^^- i'^ "^^i^i Atlantico, lat. aust. 0° 40', long. occ. 

 18° ; lect. die 3 Nov., 1838. Forsan, lat. bor. 7° 25', long. occ. 20° ; 

 lect. die 17 Oct., 1838. 



19. PoNTELLA STRENUA. — MaHs : Frons acutiuscula. Cephalo- 

 thorax 5 - 6-articulatus, angulis posticis longe acutis, capite discrete. 

 Oculi superiores remoti, inferiores mediocres. Antennae anticae fere 

 corporis longitudine, 80° - 90° divaricatse, 17 - 18 articulatse, ad me- 

 dium obsolete flexse. 'Ramus major antennarum posticarum fere triplo 

 longior. Styli caudales breves. Antenna antica dextra maris 12 - 14- 

 articulata, articulo mediano subovato, apice antico acute. Pes posticus 

 dexter crassiusculus, manu ovali, breviore quam carpus, pollice tenuis- 

 sime, acute, parce longiore, digito mediocri, subulate, rectiusculo. [Ab- 

 domen 5-articulatum.] 



Long. -jL''. — Hah. in mari Pacifico, lat. aust. 3°, long, orient. 

 175°. 



20. PoNTELLA PROTENSA. — Maris : Crassa. Frons rotundata. Ce- 

 phalothorax 5- 6-articulatus, capite discrete, brevi, angulis posticis leng6 

 acutis. Oculi superiores remoti, inferiores mediocres. Antennce anticae 

 basi vix 60° divaricatae et medio fere 70°. Ramus antennarum postica- 

 rum major plus quadruple longior. Styli caudales oblongi. Antenna 

 maris antica dextra P. strenuce similis. [Abdomen 5-articulatum.] 



Long. yV'. — Hah. in fretis " Banka " et " Sunda " ; lect. diebus 

 1, 4 Mar., 1842. 



B. Caput laterihus armatum. 



21. PoNTELLA HEBKs. — FemincB : Frons truncata. Cephalotho- 

 rax 4-articulatus, postice rotundatus. Oculi superiores disjunct), infe- 



