70 NILS HJ. ODHNER, MOLLUSCA. 
Zanzibar that into each of the cerata passes a very short diverticulum of the liver, 
it seems as if the extension of the liver into the cerata is subject to variation within 
the genus. J. aurantiaca seems to differ. from M. ferruginosa also in possessing a naked 
median portion of the back, the marginal zones only bearing cerata, as well as in 
the shape of the jaws, which are not combined as in M. ferruginosa, but separated, 
and lack the transversal crest present in this species (cf. VAyssizRE 1903, pl. ILI, 
figs. 29, 30). 
In 1909, VayssreRE, for good reasons, established for Madrella and the new 
genus Hliotia a separate family, Madrellidae, the characteristics of which he gives in 
these words (l. ce. p. 637): 
»Tentacules dorsaux ou rhinophores cylindro-coniques, présentant autour de 
leur moitié supérieure de nombreuses digitations tubulaires, simples, contractiles, 
rappellant un peu celles des rhinophores des Tritoniadés. 
Les machoires de ces Mollusques, au lieu d’étre Jamelleuses dans toute leur 
étendue, comme chez les Aeolididés, sont massives, trés épaisses, cornées, mais assez 
molles, & face interne peu concave et a face externe irréguligrement convexe, mame- 
lonnée avec ou sans arétes longitudinales. » 
c. Cephalopoda. 
Octopus membranaceus Quoy & GaimaRD. 42 miles W. 8. W., 42 feet (°/7), 
1 sp., 1. 42 mm (of which the body 17 mm). This species is easily recognized by 
the presence of an ocular spot between the base of the second and third pairs of 
arms. Distribution: Japan, China, New Guinea (Tryon 1879). 
O. cuvieri p’ORBiaNy (= macropus Risso). 45 miles W. 8. W., 72 feet (*/7), 
1 sp., 1. 50 mm (thereof 15 mm for the body). — Distribution: Canaries, Mediterranean, 
Red Sea, Indian and Pacific Oceans (TRYON 1879). 
d. Amphineura. 
Craspedochiton laqueatus Sowrrsy. 42 miles W. 8S. W., 70 feet (°° 1911), 
7 sps, max. ]. 27.5, br. 18 mm; 45 miles W. S. W., 50—S80 feet (7%, **/; 1911), 10 sps. 
The genus Craspedochiton SuurTLeworRtH (1853) includes the following species: 
C. laqueatus (SownrBy 1841), Philippines, C. liberiensis (THiELE 1909), Liberia, C. 
(Thaumastochiton) mébiusi (THIELE 1909), Mauritius, C. (Angasia) telricus CARPENTER, 
XYed Sea. The present specimens from Cape Jaubert approach in all essentials the 
Philippinian form, but differ from it in some details in the shape of the valves. These 
are — especially the anterior one — somewhat more depressed, and have a more 
quadrangular circuit than the figure in Prmsspry (1893) indicates, in the fact that the 
sutural plates are more dilated and have a convex, well curved outline. Also the 
