LIST OP PUBLICATIONS, ANATOMY, ETC. 
Ech. 11 
Toucas, — . Etude de la Faune des Couches Tithoniques de l’Ardeche. 
Bull. Soc. Geol. xviii (1890), Nos. 7 & 8, pp. 560-629, pis. xiii 
& xviii. 
Distribution of a number of Crinoids and Echinoids. 
Yceltzkow, A. Entovalva mirabilis , eine schmarotzende Muschel aus 
dem Darm einer Holothurie. Zool. Jahrb. v (Abth. f. Syst. Geogr. 
und Biol, der Thiere), Heft 4, p. 619, taf. xlii. 
[ Vide infra, , Biology.] 
Welscii, — . (1) Terrains Jurassiquos dans les environs de Tiaret, 
Freuda, et Saida. Bull. Soc. Geol. xviii (1890), No. 6, pp. 428-440. 
Distribution of a number of Echinoids and Crinoids. 
. (2) Les terrains Cretaces du Seresson occidental et de Lihon 
(fin). Op. cit. No. 7, pp. 497-510. 
Distribution of a number of Echinoids. 
Wiii'telegge, Th. List of the Marine and Freshwater Invertebrate 
Fauna of Port Jackson and the neighbourhood. J. R. Soc. N.S.W. 
xxiii, pt. ii (1889), pp. 163-323. 
Echinoderms, pp. 197-206. [ Vide infra, Systematic.] 
III.— ANATOMY, HISTOLOGY, MORPHOLOGY, AND 
PHYLOGENY. 
Bateson & Carpenter describe an abnormal specimen of Antedon 
rosacea , in which two arms, after being continued normally for a certain 
distance, break up into several secondary arms. These two abnormal 
arms are symmetrically placed with regard to the mouth and anus. 
Bell (1) finds that in Phormosoma placenta , Wyv.-Th., the organs of 
Stewart may be present in a rudimentary condition, or may be absent. 
He could find no trace of their presence in P. bursarium or P. tenue. He 
also finds the longitudinal muscles described by Sarasin entirely absent 
in Phormosoma , and very feebly developed in Asthenosoma pellucidum. 
He points out that these facts militate against the statements which 
the Sarasins based on the anatomy of Asthenosoma urens, as to the 
characteristics of the Echinothuridce. 
Camerano has observations on sexual dimorphism in Echinoderms. 
According to Carpenter (2), in many Cystids the plates of the calyx 
are as regular as in Crinoids. Many forms are dicyclic and hexamerous. 
Echinoencrinus has infrabasals, basals, radials, and interradials, which 
are perhaps homologous with the deltoids of Blastoids. In some 
genera the mouth is protected by five oral plates, that on the anal side 
being the largest, as in many Palaeocrinoids. The “ hydrophores palmds ” 
of Barrande were rightly interpreted by Noumayr as the remains of 
subtegrainal ambulacra, and they were not at the dorsal pole. Where 
there was no genital pore the anus may have subserved genital func- 
tions. Many armoured forms of Psolidce (Holothurians) have much 
