616 CR USTA CEANS F ROM SAN MARCOS, TEXAS-BENEDICT, vol. xvm. 



second article of the maxillipeds armed with a single hook. The first 

 pair of legs are strongly prehensile. The six following pairs are pro- 

 portionally much more slender and are ambulatory in character. The 

 maxillipeds and mouth-parts are distinctively those of the Cirolanida^ 



CIROLANIDES TSXENSIS, new species. 



The body is subovate, about 2h times as long as broad. The liead is 

 well rounded behind and a little flattened in front. The antennuhe 

 extend around the sides nearly to the posterior margins of the second 

 segment of the pereion. The basal article of the peduncle is nearly 

 spherical; the two following articles are elongated and nearly equal in 

 length. The flagella are com])osed of about fifteen segments, of which 

 tlie first is very short, the next is about twice as long as broad, and the 

 lollowmg segments are about equal in length and breadth. The basal 

 article of the autenn:e is very short and broad, the second and third 

 articles are a little longer than broad, the fourth and fifth articles are 

 much more elongated, the fifth being the longer. The tiagellum is com- 

 posed of about thirty segments, of which the first is the longest, and 

 the second or third the shortest, in proportion to the breadth. A'verv 

 sharp rostral spine extends beyond the basal article of the peduncles 

 ol the inferior antennae. The first pair of feet are short and stout and 

 strongly prehensile. The six following i)airs are ambulatorv and much 

 longer and more slender than usual in the family. The segments of the 

 pleon are produced at the sides to sharp points conspicuous from above. 

 The telson is wide, rounded on the posterior margin, and completely 

 <'overs the articulation of the uropods. Length, about 14 mm. Color 

 of alcoliolic specimens, white. 

 Type.—So. 10327, U.S.X.M. 



CRANGONYX FLAGELLATUS, new species. 



This blind species is more closely related to C. mucyonatus, Forbes, 

 than to any other American species. It is, however, much stouter, and 

 can be distinguished from it at sight. The head is a little longer than 

 the first segment of the pereion. It is proportionallv narrower and 

 more concave at the insertion of the upper antenme than in C. mncro- 

 natns. The peduncle of the upper antenna^ has about the same pro- 

 portions as in C. mucronatuH. The flagella of a large specimen are as 

 long as the body, numbering 01 segments on one side and 59 on tlie 

 other; the flagella of some small specimens have but 40 segments. 

 The peduncles of the lower antenme are longer than those of the 

 upper. Tbe flagellum on one side is eomposed of 19 segments, on tlie 

 other side of but 12; in small specimens the segments are from 8 to 12 

 in number. The first and second jjairs of legs are about equal in 

 length; the dactyls close down between two rows of bifurcate spines 

 C. mucronaUis has about 15 such spines to the row, while this species 



