

CYCLOPOIDEA. IQ57 



b. Styli caudales valde elongati. 

 Calanus TURBINATUS. 



Frons obtusus. Cephaloihorax antich crassus, posticd attenuatus (idcirco, 

 segmentum posticum abdomine pared latius) obtusiuscidus. Antennce 

 anticw duplo leviter curvatce, corpore breviores, tenuissimce, articulis 5 

 ultimis subasquis; setis totis perbrevibus, apicalibus (?) subapicalibusque 

 articulo non longioribus. Styli caudales tenues, paralleli, setis dimidio 

 brevioribus. 



Front obtuse. Cephalothorax broadest anteriorly, obtuse in front, 

 gradually diminishing posteriorly to breadth of abdomen, subobtuse 

 behind. Antennas slightly doubly curved, but tips not behind line 

 of beak, shorter than body, very slender, last five joints subequal ; 

 setae all short, subapical setae not longer than either of the joints ; 

 apical of the same length, one perhaps longer (broken in speci- 

 men?) Abdomen three-jointed. Caudal stylets styliform, parallel, 

 as long as abdomen, setae half shorter. 



Plate 72, fig. 8, animal, enlarged. 



Collected in the Sooloo Sea, southwest of Panay, January 29, 1842. 



Length, one-twelfth to one-fifteenth of an inch. Colour, red about 

 mouth and in posterior part of thorax ; alimentary canal, in part light 

 green ; a broad brown line either side of stomach and meeting nearly 

 over the mouth, which is the ovary; other parts nearly colourless. 

 The tapering body, the thorax diminishing to the abdomen, and with- 

 out acute posterior angles, in addition to the long slender stylets, 

 parallel in position, and bearing very short setae, are striking cha- 

 racters. It is probable that the longest of the apical setae of the ante- 

 rior antennae was broken off in the specimen examined; it may have 

 been somewhat longer than the joint : those that remain entire on 

 the joint, are about as long as the joint, and the anterior and poste- 

 rior are nearly equal. The penult has the anterior and posterior 

 about equal and as long as the joint; the same is true of the antepenult. 



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