Ech. ] 
ECHINODERMATA. 
BY 
Oswald H. Latter, B.A., Tutor of Keble College. 
I. — List of Publications. 
1. Agassiz, A. Three Cruises of the United States Coast and Geodetic 
Survey Steamer * Blake.’ Yol. n, cap. xix, Echinoderms. Bull. 
Mus. C. Z. xv, pp. 84-127, figs. 338-421. 
2. Barrande, Joach. Echinodermes. Etudes locales et comparatives 
Extraits du Systeme Silurien du centre de la Boheme. Yol. vil. 
Prague : Waagen. 
3. Barrois, J. Recherches sur le Ddveloppement de la Comatule. 
Rec. Z. Suisse, iv, pp. 545-651, pis. xxv-xxx. 
A complete account of tho development from the ovum. The author 
differs from previous writers in many poiuts, and comes to the conclu- 
sion that there is an almost absolute agreement with the development of 
other Echiuoderm larvae. Among the results obtained may be noted : 
(i) The oesophageal invagination is formed from a ventral fossa ; (ii) the 
long axis of the adult does not coincide with that of the larva ; (iii) the 
curvature of the young Pentacrinus is the ventral curvature of the 
embryo ; (iv) the peduncle is the praeoral lobe, and the peduncular cord 
is formed by a central axis of mesenchyme cells ; (v) the calyx represents 
the “body ” s.s. of other larvae ; (vi) the vestibular sac is epiblastic, and 
from it the oesophageal invagination is given off ; (vii) the 10 calcareous 
pieces arise simultaneously, and with a perfectly symmetrical arrange- 
ment ; (viii) abnormal cases occur where the larvae have failed to become 
attached, aud in such instances tho “ body ” is inserted in the side, and 
not on the summit of the praeoral lobe — i.e ., abnormalities resemble other 
normal Echinoderm larvae. 
4. Barrois, Tii. Liste des Echinodermes recueillis aux A 9 ores durant 
les mois d’Aoftt et Septembre 1887. Rev. Biol. 1 Ann. No. 1, 
pp. 31-33 ; No. 2, pp. 69-75 ; No. 3, pp. 109-115. 
List of genera and species, with their general geographical distribu- 
tion. 
1888. [yol. xxy.] f 1 
