1240 CRUSTACEA. 



gent position is the same. The posterior antennae are also alike. 

 The anterior feet, or maxillipeds, differ ; in the male, the second joint 

 has a prominence on the inner side covered with very short setee and 

 the last joint is very long and slightly curved ; in the female, the 

 second joint is without the prominence, and the terminal joint is a 

 spine not longer than the second joint. 



The abdomen of the female is nearly half narrower than the cepha- 

 lothorax, and more than half as long. First segment of abdomen not 

 shorter than the following ; bearing short appendages on either side. 

 Second segment having the posterior angles a little prominent and 

 obtuse ; the three following acute at posterior apex. 



In the female, the ovary forms an open reticulation on either lateral 

 half of the cephalothorax, extending into the head nearly to the front 

 margin. In the male (see figure 2 a), the seminal glands are ovate 

 oblong, united at apex, and lie over the stomach. The ducts extend 

 backward, and terminate in the anterior abdominal segment. 



I was unable with a lens magnifying two hundred and fifty dia- 

 meters to detect anything with reference to the circulation. 



Sapphirina. angusta. 



Digitus antennaruim posticarum articulo 2do valde {non duplo) brevier. 

 Lamellce caudales elongatce, subovatce, apice interna prominulo, 

 subacute; setis quatuor, duabus apicalibus dimidio lamellce brevioribus, 

 aliis duabus externis brevioribus. Feminae: — Corpus valde elongatum 

 (latitudine maxima fere quadruplo longius) . Conspicilla fronte insita. 

 Abdomen 6-articulatum, segmento primo angustiore, tertio, quarto, 

 quintoque lunatis et latere acutis, primo secundoque fere cequis. 



Finger of posterior antennae much longer than second joint. Caudal 

 lamellae elongate, more than twice as long as broad, subovate, pro- 

 minent and subacute at inner apex; setaa four, two apical not half 

 as long as lamella, other two external, shorter. Female: — Body 

 much elongate, more than twice the breadth in length. Conspi- 

 cilla very large, in contact, placed on the front. Abdomen six- 

 jointed, segments subequal, the first a little shorter and narrower, 

 the first two obtuse laterally, the following three lunate and acute 

 behind. 



