17 



Gen. 3. ParaealanuS, Boeck, 1864. 



Generic Characters. Body comparatively short and stout. Cephalosome 

 wholly coalesced with the 1st pedigerous segment, and slightly carinated dorsally 

 in the male; frontal part rounded. Lateral corners af last pedigerous segment 

 not produced. Urosome in female distinctly 4-articulate, with the genital segment 

 comparatively short. Caudal rami short, obtusely truncated at the tip, apical setse 

 but slightly divergent. Anterior antennae scarcely longer than the body, their 

 proximal part exhibiting in male 2 large segments clothed below with short sensory 

 appendages. 1st pair of legs with a well-marked deflexed seta at the end of the 

 basal part inside. Terminal joint of outer ramus in the 3 succeeding pairs finely 

 denticulate along the outer edge. Last pair of legs in female very small, bi- 

 articulate; left leg in male 5-articulate, right leg as in the female. 



Remarks. This genus was established in the year 1864 by Boeck, to 

 comprise a small Calanoid formerly described by Glaus as Calanus parvus. It 

 may, however, be remarked, that the genus Calanus, as defined by Glaus, does 

 not answer to Leach's genus, and in reality comprises several genera not even 

 belonging to the family Calanidce in the restriction here adopted. Besides the 

 type species described below, another nearly-allied species has been recorded by 

 Dr. Giesbrecht as P. aculeatus, and the imperfectly characterised Calanus pygmceus 

 of Glaus probably also belongs to the same genus. 



5. Paracalanus parvus, (Glaus). 



(PI. VIII & IX). 



Calanus parvus, Glaus, Die frei lebenden Copepoden, p. 173, PL XXVI, figs. 1014, PI. XXVII, 



figs. 1-4. 



Specific Characters. Female. Anterior division of body, seen dorsally, 

 oblong oval, somewhat more tapering behind than in front, greatest width about 

 equalling Vs f the length. Anterior body-segment (combined cephalosome and 

 1st pedigerous segment) about twice the length of the remaining part of metasome, 

 front evenly rounded. Lateral corners of last pedigerous segment rounded off. 

 Urosome about equalling Vs f the length of the anterior division, genital and anal 

 segments of about equal length and much larger than either of the 2 middle seg- 

 ments. Caudal rami scarcely exceeding the anal segments in length, sublinear in 

 form, apical setae of moderate length, the innermost but one the longest. Anterior 

 antennae, when reflexed, scarcely reaching beyond the pennultimate caudal segment, 

 some of the articulations less distinctly defined. Posterior antennae with the outer 



3 Crustacea. 



