1212 



CRUSTACEA. 



The setae of the anterior antenna at apex are about as long as the 

 organ, or even longer. The posterior antennae have a long slender 

 finger. The first joint of it bears one or two longish spines. The 

 anterior feet have a long finger much incurved at apex. Posterior pair 

 of natatories smallest. The branches are three-jointed, the shorter 

 not quite half the longer. 



The elliptical part of the abdomen is about half the whole length. 

 The stylets are longer than twice the second joint. The inner setae 

 are half as long as the stylets; the next are nearly half shorter; the 

 outer are minute and are situated on the side, a little distance from 

 the apex of the stylet. The pigment of the eyes was deep red. 



Eggs were pressed from the body, proving the individual to be a 

 female. They were grayish or yellowish, and elliptical in form, as 

 seen in the figure (4 h) . In specimens collected in the Pacific, August 

 19, 1839, the internal ovaries were distinct. Each was an oblong 

 cylindrical mass, lying in the cephalothorax, and extending from the 

 posterior extremity upward and forward to near the middle of the 

 anterior cephalothoracic segment. Leaving the cephalothorax with a 

 small diameter, it constituted another smaller oblong mass in the ellip- 

 tical part of the abdomen. 



CORYCJSUS LONGISTTLIS. 



Cephalothorax crassus. Conspicilla remotiuscula. Antennas anticai 

 elongate^ setidosos. Antennarum posticarum articulus 2dus digito vix 

 brevior, ad apicem internum dentiforniis, nudus et acutus, seta basah 

 longd, nudd; digito setam nudam ad basin ferente. Abdomen uni- 

 articulaturn, dimidio apicali cylindrico. Styli caudales tenues, abdo- 

 niine valde longiores, setis perbrevibus. 



Cephalothorax stout. Conspicilla large, somewhat distant. Anterior 

 antennae with the setae rather long. Posterior antennae having the 

 second joint hardly shorter than the finger, dentiform and acute at 

 the inner apex, its seta long and naked ; finger also with a naked 

 seta at base. Abdomen one-jointed, basal half elliptical, cylindrical 

 apex but little shorter. Caudal stylets slender, much longer than 

 the abdomen, setae very short. 



Plate 85, fig. 5 a, animal, enlarged, showing within the alimentary 



