ENTOMOSTRACA OF MINNESOTA. 137 



maxillipeds with a long claw longer than the preceding joint. First 

 foot with the outer ramus nearly as long as the inner, two-jointed, 

 bearing at the apex three pectinate sette. The basal joint bears a pec- 

 tinate seta externally and a spine internally. The inner aspects of all 

 the joints of both rami are spinous, the outer setose. The outer ramus 

 of the second foot is two-jointed and has one pectinate seta apically, 

 one spine internally and one spine externally, while the corresponding 

 segment of the third foot has two pectinate setre apically and one 

 internal seta and two external spines. The fourth foot has a minute 

 one-jointed outer ramus bearing one long pectinate seta and a short 

 external spine. The fifth foot seems to consist of one piece, armed as 

 follows: Esternally a conical projection near the base with a long 

 simple seta, outer apical lobe (= the homologue of second joint) with 

 five setee, the second and fourth of which are longer and pectinate; the 

 inner apical lobe bears six (or five) setie, all but the innermost being 

 pectinate. The two lobes are separated by a simple incision, and 

 repeated examination showed no indication of any segmentation in 

 either sex. The abdomen is very slender, and, like the thorax, its 

 segments are all ornamented caudad with a series of spines or teeth. 

 Stylet two and a half times as long as wide, with one or two small 

 spines externally one third the length from the base and one longer 

 spine near the middle of the inner margin, which is ciliate. The two 

 median apical sette are fused at the base and the inner is three times 

 as long as the outer, which is twice as long as the stylet. The inner 

 apical seta is short, the outer obsolescent. 



In the male the antenna is reduced to a thick tumid member with 

 the third and fourth segments greatly enlarged. The apical segment 

 is furnished with three hook-like claws. Flagellum slender, of uni- 

 form diameter. Fifth foot has on the outer apical lobe four sette and a 

 small spinule. and on the inner three non-pectinate setfe. Caudal 

 stylet greatly elongate, over four times as long as wide and nearly 

 twice as long as the i^receding segment. 



Marshia brevicaucla^a sp. n. 



Plate XXXII, Figs. 6-13. 



The second species of this genus at present known maybe described 

 comparatively. Similar to 31. albiiqiierquensis in most respects, but 

 differing in a few points so far as known. The caudal stylets are 

 short, about twice as long as broad, the longest seta being seven times 

 the length of the stylet, while the outer median seta is twice and a 

 half as long as the stylet. These setse are not fused at the base. In 

 the male the difference between the species is greater. The proportions 

 of the stylet being the same as in the female, but the longest seta is 



