VIII 



ones disappear almost entirely in the lower part of the polypidom, whereas in the upper fourth the two dorso-lateral valves 

 are united as a septum. In the tentacles of the polyps, as also in the connective tissue of the rachis elongate, triangular, 

 smooth spicules. 



Sp. Gondul mirabilis, n. sp. 



Polypidom almost pyramidal in shape, slightly curved lengthwise, firm but flexible; 27 mm. high, 8 mm. broad in 

 the middle, but narrower towards the extremities. Six pairs of pinnules. Colour: a yellowish-red, with dark-red polyps. 



Cladiscus Lovéni, n. sp. 



Tab. XI, figs. 1 — 4. 



Polypidom 85 mm. long, slender, stiff. The cells exceedingly ventricose, short, arranged in alternating series — 4, 

 but seldom 3, to each; under every series of cells, as a rule, 4 oblong zooids on the dorsal and lateral surfaces. The ventral 

 surface naked. 



It differs chiefly from Cladiscus gracilis in having the ventral surface naked, in the short series of zooids under the 

 series of cells, in the short, ventricose cells, in the number of the latter, amounting, as a rule, to 4 in each series, and finally 

 in the papillæ on the margin of the cells being longer, which is also the case with the polyps. 



Of Cladiscus gracilis we had but one, and that a mutilated specimen; hence both the description and the generic 

 characters w ere necessarily defective. Meanwhile, we obtained from Professor Sv. Loven in Stockholm a fully developed specimen 

 of Cladiscus Lovéni, and are thus enabled to complete the generic character. 



Polypidom small, stiff. The cells separated, disposed on the rachis in alternating series, with 8 longitudinal ribs, as 

 also 8 papillæ round the orihce. The polyps robust in structure, retractile. The axis round, terminating in a knop at the 

 commencement of the end-bulb. No calcareous deposit, either in the polyps, the cells, or the sarcosoma. 



Professor Kolliker, in » Report on the scientific Results of the Voyage of H. M. S. Challenger. Zoology, Vol. I. Part II. 

 Report on the Pennatulida«, has given a systematic review of the order Pennatulida, that deviates in various respects from 

 his former systematic account, In this Review, he refers the genus Cladiscus to the family Protocaulidæ, which, as its 

 distinguishing character, he assigns the absence of cells; Cladiscus however, having, not only cells, but such as are very fully 

 developed, this fact must have escaped his attention. Hence, in our judgment, the genus should be referred to the family 

 Protoptolidæ. 



Pennatula distorta, varietas aculeata, n. sp. 



Tab. XI, figs. 5 — 10. 



Polypidom 220 mm. long, with the upper part comparatively flexible, acutely pointed; the lower part terminating 

 in a spindleshaped bulbus. 



