52 PROCEEDINGS OF THE ACADEMY OF [Jan., 



Second pair — outer ramus, four spines, five setae; inner ramus, one 



seta, one spine, four setae. 

 Third pair — outer ramus, four spines, five setae; inner ramus, one 



seta, one spine, four setae. 

 Fourth pair — outer ramus, three spines, five setae; inner ramus, one 



seta, two spines, two setae. 



The fifth feet (PI. IV, fig. 4) are merely flange-like projections of 

 the fifth thoracic segment. They are more lateral than ventral, and 

 there is ordinarily no line marking the position of a former segment. 

 Occasionallj', however, I have noted a faint indication of a possible 

 segment, extending from the base of the outer spine obliquely to a 

 point below the inner spine where the large row of serrations con- 

 necting the two fifth feet ceases (see description of cephalothorax 

 and fig. 4, PI. IV). The fifth foot is armed with three nearly equal 

 spines, of which the inner is coarsely plumose, the middle one more 

 finely plumose, and the outer bare or finely and sparingly plumose 

 on its outer side. Schmeil's criticism of Brady's '' otherwise excellent 

 drawing, " in which he shows all three spines to be plumose, is hardly 

 justifiable (see note 2, p. 176, of Schmeil's monograph). In addition 

 to the three large spines there are several small serrations about the 

 base of the inner spine and an uneven mass of similar small serrations 

 laterally below the outer spine. 



The receptaculum seminis 'consists of two nearly equal divisions 

 extending as narrow bands transversely across the entire first 

 abdominal segment. The porus is situated in the middle of the 

 short, median, common portion. Owing to the dark color of this 

 species, the structure of the receptaculum is extremely difficult to 

 observe. 



The egg-sacs are l^orne close to the abdomen and frequently extend 

 quite beyond the end of the stylets-. They usually contain from ten 

 to twenty large dark eggs. The oviducts are of unusual interest in this 

 species. While in all other species they terminate within the cephalo- 

 thorax, in C. phaleratus they extend as a blind duct to the anterior 

 border of the fourth abdominal segment (PI. IV, fig. 1). 



The following measurements of six females covering collections 

 from the same spot during two years, give an average length of 

 1.73 mm. 



No. 1 Total length = 1.6 



No. 2 " " = 1.95 



No. 3 : " " = 1.88 



No. 4 " " = 1.78 



No. 5 " " = 1.61 



No. 6 " " = 1.6 



