KCHINODERMATA. 
565 
Den drochiro tida . 
Orcula cucumiformis^ sp. n., Semper, 1. c. p, 244, Taf. 40. fig. 89, Cape 
York, Australia. 
Thyonidium scahrum, sp. n., Sars, 1. c. p. 19, 300 fathoms, off Skraaven, near 
T. hyalinum ( Cucumaria\ Forbes ( = !T. <pellucidumy Diiben & Koren, non 
Vahl). — Thyonidium conchilegum, sp. n., Pourtales, l.c. p. 128. 
Thyonidium 'peruanum, Semp.,= F. Selen., Semper, l.c. p. 243. 
Thyonidium ehlersi, sp. n., Heller, 1. c. p. 77, pi. 3. fig. 11, Lesina. 
Pattalus peruvianus,\QTr\W,=zAnaperus peruanus, Y^rrWX. On dissection 
this proved to he a Pattalus, very near to P, mollis, Sel. [? Thyonidium molle, 
Sel.]. Verrill, 1. c. p. 376. 
Thyone incrmis, sp. n., Heller, 1. c. p. 78, pi. 3. fig. 12, Lesina. 
Thyone (Sclerodactyla) hraziliensis, sp. n., Verrill, 1. c. p. 371, pi. 4. fig. 8 
(oral plates), Ahrolhos reefs. 
Thyone {Stolus) chilensis, sp. n,. Semper, 1. c. p. 241, Taf. 40. figs. 3-6, Chili • 
T. (iS.) rosa, sp. n., Semper. 
Stolinus cataphractus, Sel., is quoted as a synonym ©f Psolus cuvierius, 
,Tager. Semper, 1. c. pp. 240 & 272. 
Ciwieria operculata, sp. n., Pourtales, 1. c. p. 127, off Sand Key, 160 fathoms. 
Colochirus tuherculosus, Quoy & Gaimard. Semper (/. c. pp. 239 & 271) 
gives the synonymy of this species as follows : — C. quadrangularis, Tros. ; 
Cercodemas anccps, Selenk. ; Cucumaria pentagona, Semp.; Col. anceps, Semp.; 
C. quadrangularis, Sel. (part.). 
Colochirus quadrangularis, Lesson, = CoZ. quadrangidaris, Sel. (part.). 
Colochirus peruanus, sp. n., Semper, 1. c. p. 239, Taf. 39. fig. 20, Peru. 
Cucumaria calif ornica, sp. n.. Semper, 1. c. p. 236, Taf. 39. fig. 16, Taf. 40. 
fig. 10, Mazatlan. Perhaps C. frondosa (Jfig.) of Stimpson, from California. — 
C.Japonica, sp. n., Semper, 1. c. p. 236, Taf. 39. figs. 2, 3, & 18, Japan. 
Cucumaria pentactes (0. F, M.), Pennant. (The species recorded by Forbes 
under this name is C. frondosa.) Selenka records it as found in Norway ; 
but Sars knows it not, and simply mentions that M‘ Andrew and Barrett have 
found it there. Semper adds that " die Bestimmungen dieser beiden Schlepp- 
netzzoologen sind aber sehr wenig zuverlassig,” and that it appears to him 
probable that C. hyndmanni or C. elongata was mistaken for it. This re- 
mark must apply only to the echinodermological knowledge of the dred- 
gers ” referred to, the elder of whom never named an Echinoderm in his 
life ; the younger is dead. Semper, 1. c. p. 236. 
Cucumaria hyndmanni, Thompson, as synonyms C. korenii, Liit., and pro- 
bably C. caldgera, Agass. (Stimps. ?). Semper, 1. c. p. 237. 
Cucumaria kollikeri, sp. n.. Semper, 1. c. p. 237, Sicily, very near C. syra~ 
cusana, Grube ; C. duhiosa, sp. n.. Semper, 1. c. p. 238, Peru. 
Cucumaria kirchshergii, sp. n., Heller, 1. c. p. 76, Taf. 3. figs. 8-10, Lesina. 
Near C. hyndmanni. 
Cucumaria frondosa, Gunner. Semper says that ^^Selenka’s Arragonit- 
nadeln sind mir ganz rathselhaft ” (/. c. p. 234). 
Molpadid(2. 
Molpadia, char, emend.. Semper, h c. p. 233. Twelve to fifteen tentacles, 
fingered on the ends. Pharyngeal retractors and also the elongated radial 
portion of the calcareous rings, as in the Dendrochirotae. As species, M. chi- 
