ECHLXODEKM LAKVJS. 9 



a point of importance, since it gives positive evidence of the existence of thoao 

 structures among the Cucumariithe, a fact which hat been asserted, but never 

 conclusively proven. 



Zoological UU.ratory, McGill University, April 1st, 1U07. 



LIST OF PAPERS QUOTED. 



1. I'.KI.I.. P. J. " Echinoderms " in Report on the collcctioni of the 'Southern Cross,' Ixjmloii, l'Mr>, 



p. 214. 



2. BUBY, H. "Studies in the Embryology of the Echinoderms." Q.J. Micros. Sci., vol. 29 (1H89). 



pp. 409-449. 



3. CLAKK, H. L. " SynapU vivipara : a contribution to the morphology of Echinoderniata," Boston, 



Memoirs Soc. Nat. Hut., 5 (1898), pp. 5.-J-88, 5 pU. 



4. HKXDERSOX, E. H. 'Some observations on the development of an Ante-rid with large yolky sggi 



from the Franklin Islands," Ann. Mag. Nat. Hist., vol. 1C (l'JO'>). 



6. LUDWIO, H. " Die Secwalzen " in Broun's Klasseu u. Orduuiigcn d. Thier-Rcichs, '2 Bd., 3 Abth., 

 1 Buch. (1889-92). 



6. LUDWIG. " Zur Entwicklungsgeschichtc dcr Holothnrien." Sitzungsber. I'renss. Akad. d. Wit*. 



Berlin, 1891, p. COS. 



7. MACBBIDB, E. W." Development of Astcrina Kibbosa." Q.J. Micros. Sci., vol. 88 (1896), 



pp. 389-411. 



8. MACBRIDK. E W. "The Development of Echinoids," pt. 1. "The lame of Echinus miliaris and 



E. esculentns." Q.J. Micros. Sci., vol. 42 (1899), pp. 835-339. 



9. MOBTKKSKX, TH. "Die Echinodermenlarven dcr Plankton-Expedition d. Humboldt-Stiftung." 



Bd. II. J., Kiel and Leipzig, 1898. 

 10. THOMHOX, C. WYVILLB. " The Voyage of the Challenger the Atlantic," London, 177. 



TABLE OF PLATES. 



FIG. 1. Atttruu brandtt 'Bell, x 12J. Youngest embryo of brood. 



Fio. 2. Ophiopluteus sp. n. ? x Ion. 



Flo. 8. te/iinopltilfiix antarcticiu sp. n. x 100. 



Fio. 4. Cticumaria trocea Lesson, x 1. Adult female, showing openings of the two brood-|iuuchet. 



Fio. &. Cueumaria crocra Lesson, x 1. Another view of the same specimen, with the Iwdy-wall cut 



through so as to expose the interior of the brood-pouches. 

 Fio. 6. Cttcvmaria crocfa Lesson, x 12. Young embryo, born after capture of the mother, which is 



shown in figs. 4 and 5. 

 Fio. 7. Cueumaria erotta Lesson. Transverse section through the anterior region of embryo shown in 



fig. 6. 



