194 



Fam. 13. Corycaeidae. 



General Characters. Body not at all depressed, but more or less 

 pronouncedly club-shaped, with the anterior division well defined from the 

 posterior and obtusely truncated anteriorly. Front without any true rostral 

 prominence, but provided with 2 very large juxtaposed corneal lenses (con- 

 spicilla). 1st trunkal segment confluent with the cephalon, or only very slightly 

 defined from it. The 3 succeeding segments in some cases imperfectly separated 

 dorsally; lateral lobes af 3rd segment generally produced to acute lappets. 

 Last trunkal segment imperfectly developed. Tail with the segments reduced 

 in number, in some cases wholly confluent. Caudal rami more or less pro- 

 duced, styliform, with the apical setae partly spiniform and reduced in number. 

 Anterior antennae comparatively small; posterior ones very strong and pro- 

 nouncedly prehensile, terminating in a clawed hand, which is larger in male 

 than in female. Oral area placed far behind and somewhat prominent. Max- 

 illae and anterior maxillipeds very small and clawed at the extremity. Posterior 

 maxillipeds well developed in both sexes and distinctly prehensile. Natatory 

 legs with the inner ramus much smaller than the outer; that of 4th pair much 

 reduced or quite wanting. Last pair of legs absent in both sexes. 



Remarks. This family is here taken in a more restricted sense than 

 done by Giesbrecht, who comprised within it also the genus Sapphirina and 

 allied genera. These, I believe, should more properly be removed to a sepa- 

 rate family, the Sapphirinidce, as they differ very conspicuously both in the 

 general form of the body and in some of the structural details. In the restric- 

 tion here adopted the family as yet only comprises 2 nearly-allied genera, 

 viz., Corycceas Dana and Corycella Farran. Only the first-named genus is 

 represented in the Fauna of Norway. 



Gen. 47. Corycaeus, Dana, 1845. 



Syn: Agetus, Kroyer. 



Generic Characters. Body more or less elongated, subclavate in form, 

 with the anterior division only slightly dilated. Cephalic segment very large, 

 and in most cases exhibiting behind, across the back, a fainte suture, indicating 

 the limit between the cephalon and the 1st trunkal segment; corneal lenses 



