496 MONTGOMERY, The female of Choidodes albibarbatus Montg. 



C. alhibarhatus^ but differs frora it in that the largcst papillae occur 

 in fours ("due a due"), in that the high papillae which Surround the 

 preceding do not bear hairs, and in the different form of the cuti- 

 cular spines. 



2) C. moutoni Cam. (from China) differs from it in the arrange- 

 ment of the papillae, in the suramits of the lower papillae not being 

 dentated, and in the cuticular spines being placed on the summits of 

 papillae. 



3) C. timorensis Cam. (Timor Island, Malaysia) differs from it in 

 lacking the curved spines, in the shortness of the hairs on the central 

 papillae, and in the grouping of the latter into threes. 



4) C. ferox Cam. (Congo, Africa) differs from it in that the smallest 

 papillae have not dentated summits, and in that each group of larger 

 papillae is not composed of more than 9 — 13 papillae. 



The following paper, describing a new Chordodes^ has been in- 

 accessible to me: Jägerskiold, "Chordodes Kallstenii, eine neue Gor- 

 diide aus Kamerun", in: Bih. Svenska Vet.-Akad. Hdlgr., V. 23. 



Wistar Institute of Auatoray and Biology, 



University of Pennsylvania, Philadelphia, U.S.A. 



20. April, 1898. 



Explanatioii of the Figures. 



Plate 29. 



All figures are drawu with the camera lucida, Figs. 5 and 6 from 

 the alcoholic specimen, the other figures from Canada baisam prepara- 

 tions. A microscope and lenses of Zeiss were employed. 



Fig. 1. Transverse section of the cuticle (homog. immers. ^/^g, 

 oc. 2). 



Fig. 2. Surface view of the cuticlo (obj. C, oc. 4). 



Figs. 3, 4. Transverse sections of the cuticle ; in Fig. 4 the layers 

 of the fibrous cuticle are somewhat diagrammatically represented ; in 

 Fig. 3 the hairs of the large central papillae are not dravvn (homog. 

 immers. Vi 2) ^^- ^)- 



Fig. 5. Outline of the head end (obj. A, oc. 2). 



Fig. 6. Outline of the posterior end, lateral view (idem). 



