Ech. 12 
ECHINODERMATA. 
conicis, singulos pedicellos gerentibus, a3qualiter sparsis tectum. Tenta- 
cula 10, arborescentia, quorum 2 minora. Anus dentibus quinque 
calcareis munitus. Tabulae calcareae cribros£e instratum continuum 
subcutaneum in papillas extensum coalitae.” T. muricata^ sp. n., id. 1. c. 
p. 453 (Kerguelen, 50 fathoms). 
Fentactella, g. n., Verrill. In general appearance like Fentacta, but 
destitute of calcareous plates around the oesophagus and having a 
distinct muscular gizzard. Tentacles 10, arborescent, nearly all equal ; 
suckers in 5 double rows, the intervening spaces smooth. F. knvigata, 
sp. n., id. Bull. U. S. Nat. Mus. hi. p. 68 (Kerguelen, 12 fathoms). 
Thyone scabra, id. Tr. Am. Ac. hi. p. 51. 
Fsolus ephippifer^ sp. n., Wyv.-Thomson (22) p. GO (Heard Island, 75 
fathoms). 
Molpadia violacea, sp. n., Studer, 1. c. p. 454 (Kerguelen, 100 fathoms). 
Slgmodota, g. n. {Sy^iaptidarum), id. ibid. “ Tentacula 12, digitiformia ; 
cutis mollis, Ijevis ; corpuscula calcarea rara sigmoidea.” S. purpurea 
(Less.) {Chirodota purpurea^ 
Elpidia glacialis, g. n., Theel (21), from the Karian Sea. 
Echinid^. 
Echinolampas alexandri, sp. n,, Loriol (11), p. 4, pi. i. figs. 1-3, Mau- 
ritius ; E. oviformiSf Lrak., described and figured for comparison, id. 1. c. 
p. 7, pi. i. fig. 4. 
Hemiaster cordatus, sp. n., Verrill, Bull. U. S. Nat. Mus. hi. p. 69 (Ker- 
guelen). (Sexual differences in the size of the genital pores and the depth 
of the lateral ambulacral grooves). (According to A. Agassiz, this =. II. 
australis, cavernosus, Phil.). 
Aerope rostrata, g. & sp. nn. (Thomson MS.), remarkable new type of 
Spatangoid, described (P. R. Soc. xxv. p. 211) by A. M. Norman from 
specimens dredged in Davis’ Strait (1750 fathoms). Allied to Fourtalesia 
diiid. Archiacia. Shape subcylindrical, sloping anteriorly; ambulacral 
system eccentric, confined to the anterior slope, circumscribed by a 
fasciole ; one ambulacrum the largest, situated in a broad but shallow 
depression ; lateral ambulacra short ; mouth inferior, not situated in a 
groove ; anal aperture dorsal, nearly flush with the surface. 
Brissus {Metalia) robillardi, sp. n., Loriol, 1. c. p. 9, pi. ii. fig. 1 (Mau- 
ritius). 
Goniocidaris membranip>ora, sp. n., Studer (19), p. 454 (Kerguelen) ; 
vivipara, id. 1. c. p. 455 (East Coast of Patagonia, 60-63 fathoms). 
Echinus diadema, sp. n., id. 1. c. p. 456 (Kerguelen). 
Astropyga elastica, sp. n., id. ibid. p. 465 (New Britain). 
Cidaris Thomson (22) p. 63 (Kerguelen). 
Schleinitzia, g. n. {Cidaridarum), Studer. “ Testa globosa, supra et infra 
complanata, poris sulco connexis, tubercula perforata et crenulata: areola 
tuberculorum paullum immersa, ovalis, circulo granulorum circumdata. 
Zona ambulacralis angusta, paullum flexuosa; area abactinalis permagna, 
scutellis analibus numerosis, tabulae genitales ab ocellaribus plane se- 
junctae. Aculei primarii inaequales ; infimi spatulati, margine crenulati ; 
