290 PROCEEDINGS OF THE ACADEMY OF [April, 



Size and Color. — The largest female (the type of C. morgani) 

 measures 222 mm. in length, the largest male 220 mm., the 

 smallest individual seen (male, co-type of C. pueriUs) 6-i ram. 

 The color varies from a dull chocolate l)rown to a light bufi brown, 

 averaging darker in the males; the head end is always white. 



Cuticle. — Cross sections of the cuticle examined with high 

 powers show the following kinds of prominences: 



1. Low papillre of irregular outline, rarely higher than Inroad, 

 ■which bear no spines. These are shown in Plate XI, figs. 1-3, 9. 

 In general they are, next to the following kind, the most numer- 

 ous, and are generally the smallest. 



2. The most numerous are small papilUe, rounded or more 

 frequently conical on outline, each of which bears a delicate, stift 

 spine of nearly its own height. These are shown in Plate XI, figs. 

 1_3^ 5-11. Genei-ally they are rather evenly distributed between 

 the larger papillae, but in one female (fig. 7) considerable portions 

 of the cuticle show them arranged in close patches, without papilhe 

 in the spaces intervening. In none of the males was such an 

 arrangement found. 



B. Large papillse, considerably higher and broader than the pre- 

 ceding, shown in Plate XI, figs. 1, 3, 5, 6, 10, 11. In the small- 

 est female (length 125 mm.) these were entirely absent. Their 

 crowns are generally flattened or rounded, and bear each a circlei 

 of short, stifi, delicate spines, few and variable in number; in the 

 largest female, the type of C. moniani, fig. 11, most of the papilla? 

 were not provided with such spines. Sometimes, not frequently, 

 the bases of these papillce are tuberculated or deutated. In the 

 males these large papillte are generally higher than broad, except 

 in the smallest male (fig. 1, co-type of C. puerilis), where they are 

 about as broad as high. In the females they are relatively less 

 numerous than in the males, and relatively broader and shorter, 

 more rectangular in outline and with their summits more regularly 

 flattened. Fig. 11 shows their appearance in the largest female, 

 which may be compared with the appearances in the largest males 

 (Plate XI, figs. 3, 5, 6). 



4. Small rounded papillte, each of which bears on its summit a 

 long, hyaline, finger-shaped process (Plate XI, figs. 1, 3, 8, 11). 

 These are present in all the individuals, but very much less nu- 

 merous than any of the preceding kinds, generally occurring at 



