376 MEMOIRS OF THE CARNEGIE MUSEUM 



Neville Island, (collected by D. A. Atkinson, May 14, 1899, CVit. No. 74. 36). The 

 claws are intonnediate between male and female, but iiu-linini:,' toward the male 

 form. The third pereiopods have strong and well developed hooks on the ischio- 

 jjodites of the type of the first form male. The first pleopods are very peculiar, 

 (Plate XXXIX, I'igs. Id and 7t;), and unlike those of ('. oJisciinis : they rather 

 resemble those of C. li'inosiis. Their length and strength are normal, but there is no 

 shoulder, and the two parts are separated only for a short distance at the tips, similar 

 to C. Jiiiiosa-^, but the tips are not twisted. The outer tip is horn_y and pointed, the 

 innei- suft, thicker, and tapers to a blunt point. The second pleopods are of the 

 normal male type. In addition this individual possesses a well developed amiulus 

 ventralis, and sexual orifices only on the third pereiopods. Thus it appears to be a 

 female, with the secondary sexual characters of the male well, but not specifically, 

 developed. 



None of the two cases of apparent hermaphroditism just descril>ed (Xos. 3 and 4 ) 

 agrees with any of the four cases mentioned by Faxon, (1S85(( p. 13, 14), or the four 

 described by Hay, (1905, p. 226 and 227). Additional cases will be described below 

 under C. hartani. There is in tlie ( 'arnegie Museum a furtber individual of herma- 

 phroditic character, namely a specimen of Caniharn.i ruMicus Girard, from the 

 Wabash River, Bluffton, Indiana, collected by Mr. E. B. Williamson, June 1, 1905, 

 Cat. No. 74. 57cS. I a{)pend a description of it. 



The specimen is externally a female, possessing the female type of claws, a well- 

 developed annulus, female sexual openings, and no hooks on the third pereiopods. 

 But the first pleopods are peculiar ; they are short and stout ; the bases are iden- 

 tical with those of the male pleopods; the distal parts, however, reach only to 

 about the middle of the coxopodites of the fourtb pereiopods; their tips are soft, 

 blunt, and slightly curved inward, and possess the furrow which divides them into 

 an outer and inner part, but tliese parts are not separated at the tips. The second 

 pleopods are of the female type. This case corresponds in a certain degree to the 

 second, third, and fourth, mentioned by Faxon, chiefi}' so to the third (in C. diog- 

 enes). The specimen is apparently a normal female, only the first pleopods are 

 transformed in a peculiar way, resembling the male type generallj% but differing 

 from the specific shape. In the present case the first pleopod is different from 

 Faxon's case in detail. 



