250 AMPiTTPonA nor:\iat,ta. 



thopoda haA-ing the propodos slender, tapering ; second pair hav-ing 

 the propodos ovate, palm deeply concave, unarmed. In othei- 

 respects the animal resembles P. variegatns. 

 Length ^ths of an inch. 



Hah. Trawled off Plymouth {C. S. B.) ; Polpcrro {Mr. Louglirin). 

 " Coast of Norway and Eohusia : gregarious '' {BruzeVnis). 



I have recently received, from my valued correspondent Itfr. 

 Loughrin, some specimens of the nests of Podoccri, built among 

 zoophytes ; in one of these was a female of this species, carrpng 

 eggs, while sheltered in the same nest were many young, evidently 

 of different ages. 



7. Podocerus cylindricus. (Plate XLIV. fig. 4.) B.M. 



Podoceriis cylindricus, Saj/, Journ. Acad. Philad. i. pt. 2. 



Edwards, Hist, des Crust, iii. p. G4. 

 Iscliyrocerus ang-uipes, Krmjer, Griinl. Amfip, p. 238. t. 3. f. 14. 



Edwards, Hist, des Crust, iii. p. 56. 

 Cerapus fucicola, Stimpson, 3Iarine Invert. Grand 3fanan,Tp. 48. f. 34. 

 Podocerus anguipes, Bruzelius, Skand. Amiih. Ganun. p. 21. 

 Gammarus Zebra, JRathke, Fauna Norveq. in Act. Acad. Leopold, xx. 



p. 74. pi. 3. f. 4 (female). 

 Ischyrocerus minutus, Liljehorq, Konql. Vetensk. Akad. Handl. 18o0. 



p. 335; Ofvers. uf Komjl. Vet. Akad. FdrJwndl.1855, p. 128 (young). 



Eyes round. Superior antennte longer than the peduncle of the 

 inferior ; flagellum longer than the last joint of the peduncle. 

 Inferior antennae more than half the length of the animal ; flagel- 

 lum scarcely half the length of the last joint of the peduncle, the 

 last three articuli having, besides hairs, strong spines, which 

 iiicrease in curvature until, at the apex of the last articulus, they 

 form perfect hooks. Pii'st pair of gnathopoda ha\dng the pro- 

 podos ovate, tapering, palm oblique, imperfectly defined by four 

 sharp spines; dactylos long,, but slightly bent, serrated (almost 

 pectinated) upon the inner margin. Second pair of gnathopoda 

 having the propodos very long, as long as the cephalon and fii'st 

 segment of the pereion, upper margin arcuate, the lower nearly 

 parallel with the upper, fringed with cilia, palm not defined ; 

 dactylos short, coarsely serrated upon the inner margin. Posterior 

 pair of pleopoda ha^dng the inner ramus simply stylifonn, the outer 

 terminating in three hooks. 



The female differs from the male onlj' in the slightly smaller size of 

 the propodos of the second pair of gnathopoda. 



Length -^ths of an inch. 



Hah. Egg Harbour (Say); Sukkertoj^per, Greenland (Holhlill); 

 Grand Manan (Sfim^ison). 



