356 AMPHIPODA ABERRANTIA. 



7. Caprella cornuta. (^ Plate LVI. fig. 5.) 

 Caprella comuta, Dana, U. S. Explor, Exped. p. 816. pi. 54. f. 5. 



" Body slender. Segments oblong ; second, third, fourth and fifth of 

 the pcreion subequal in length. Cephalon hardly higher than long, 

 a little shorter than the next segment, armed near the middle of 

 the dorsal surface with an acute spine, obliquely erect. Second 

 segment of the pereion not three times as long as broad. Superior 

 antennas rather longer than half the body, moderately stout ; fla- 

 geUum with from ten to fourteen articuH, one-fourth shorter than 

 the peduncle. Inferior antennae very little longer or slightly shorter 

 than the peduncle of the superior. Branchiae narrow- elliptic. Pro- 

 podos of the first pair of gnathopoda small : propodos of the second 

 pair oblong ; palm nearly straight, having an acute tooth near the 

 base, and another anterior to the middle. 



" Length about | an inch. 



" Hah. From among sea-weed near the Fort, not far from Praya 

 Grande, Rio Janeiro, December 1838. Both males and females were 

 abundant." — Dana. 



8. Caprella acutifrons. (Plate LVI. fig. 6.) B.M. 



Caprella acutifrons, LatreiUe, m Des7narest, Consid. stir les Cr^ust. p. 277. 



Edwards, Hist, des Crust, iii. p. 108. 



White, Hist. Brit. Crust, p. 216. 

 Caprella Pennantii, Leach, Edinh. Encycl. vii. p. 404. 



Spence Bate, Synopsis, 6fc., Ann. Nat. Hist. Feb. 1857. 



Female. — Cephalon anteriorly and superiorly surmounted by a tooth 

 directed forwards, Fii'st segment of the pereion very short, the four 

 following subequal. Superior antennae not haK the length of the 

 animal ; inferior longer than the peduncle of the superior. Second 

 pair of gnathopoda articulating near the anterior extremity of the 

 second segment of the pereion ; propodos ovate, tapering ; palm 

 deeply waved, defined by an obtuse angle anned with a large 

 tooth or spine, central lobe crowned by small tubercles. Three 

 posterior pairs of pereiopoda short, robust ; anterior margin of the 

 propoda excavate. 



Length -^^-ths of an inch. 



Hah. Devonshire coast {Leach; C. S. B.). 



The animal is generally covered with numei'ous small points or hairs. 



The female differs from the male in ha'sing the second pair of 

 gnathopoda articulating quite at the anterior extremity of the second 

 segment of the pereion, and in having the palm of the propodos 

 almost straight, and defined by a small tooth. 



