CYCLOPOIDEA. 



1143 



are very short; the last joint of these antennae is slightly longer than 

 the preceding, and the penult is a little shorter than the antepenult. 

 The anterior of the apical setae is a little the longest. The last segment 

 of the thorax is less than one-third the length of the preceding, and is 

 also considerably narrower. The caudal stylets are slightly divergent. 

 Colour of pigment of inferior eyes carmine-black; seen in a vertical 

 view usually just behind the superior eyes. In the posterior part of 

 the cephalothorax there are four oblong glands of a deep blue colour. 



The description above given is drawn from the Pacific specimens. 

 The Atlantic specimens present essentially the same characters. The 

 posterior extremity of the cephalothorax has very short acute points. 

 The curved hairs towards the base of the antennas are the same as 

 above mentioned, and so also, the apical setae and the position of the 

 organs. The longer caudal setae may be only four in number; of this 

 I am not certain. The spot of pigment corresponding to the inferior 

 eyes, is smaller in my figure than for the Pacific specimens. The 

 apical joint of longer branch of posterior antennae is hardly one-fourth 

 as long as the preceding joint; the setae of the same are as long as the 

 branch. Natatories four pair, the posterior longest. The blue glands 

 in the posterior part of the cephalothorax are only two, but are much 

 elongated, as if proceeding from the coalescence of the two on each 

 side in figure 6 a. After death, these spots diffuse a blue colour 

 through the surrounding parts. 



PONTELLINA DETRUNCATA. 



Frons obtusus. Ceplialothorax 5-6-artiadatus, capite discrete, angulis 

 posticis recti truncatis et extus brevissimd acutis. Oculi superiores 

 scepius disjuncti, inferiores rnediocres. Antemice anticce 22-24-arfo'cw- 

 latce, vix corporis longitudine, late divaricatce, apicibus fronte valde 

 anterioribus et prorsum curvatis; setts brevibus, rectis, posticd penul- 

 timd longiore quam apicales vel alios subapicales. Antenna dextra 

 maris medio incrassata, subteres, 12-13-articulata, artlculo tertio elon- 

 gato, obsolete articulato, septimo {octavo?) brevi et subtriangirtato, 

 duobus sequentibus tenuibus, longis. Pes posticus dexter maris cras- 

 sissime cheli/ormis, maiw\ subovatd, digito immobili laterali, obtuso, 

 dimidio breviore, digito tnobiU elongato, tenui et curvato. Styli cau- 

 dales breves, setis 5 subwquis. 



