ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 581 



those included." The four families represented are all of very wide dis- 

 tribution ; the types are all deep-water types. The Crinoid fauna of the 

 Hawaiian Islands is " tropical oceanic ; that is, composed of genera 

 which are certain to be found in all tropical or sub-tropical isolated 

 islands, with a slight West Indian and somewhat stronger Indo-Japanese 

 tinge." The author briefly discusses the recent Coinatulids, and gives a 

 key to their families. 



Abnormal Arm-structure in Crinoids.* — A. H. Clark puts on 

 record a number of cases which have recently come under his observa- 

 tion, e.g. sis arms in Rhizocrinus lofotensis, a third costal intercalated 

 between the normal two on one of the rays of Pcecilometra accela, two 

 costal series in one inter-basal area in Heliometra maxima. 



Genus Eudiocrinus.f — A. H. Clark emends the definition of the 

 genus Eudiocriiius, which belongs to the family Zygometridae, and 

 includes E. indivisus (Semper), E. granulatus (Bell), and E. variegatus 

 sp. n., here described. A family Pentametrocrinida? is proposed for the 

 two genera Pentametrocriuus (which includes five species formerly re- 

 ferred to Eudiocriaus) and Decametrocrinus. 



Japanese Comatulids.J— A. H. Clark reports on a small collection 

 which includes Gonlaster imbricata sp. n., Thalassometra Tcomachi sp. n., 

 Eudiocriiius variegatus, and the remarkable Tropiometra afra, the 

 Japanese specimens of which closely resemble those from Australia. 



Ccelentera. 



Crawling Sea-anemone. § — J. F. McClendon describes a species of 

 Cradactis from Tortngas which is able to crawl on its tentacles. Outside 

 the ordinary tentacles it has branched tentacle-like .structures or 

 " fronds," which look like sea-weed. The fronds contract at night, they 

 have nematocysts and mucus glands, but they do not carry food to the 

 mouth as the true tentacles do. When a bit of crab-meat is placed on 

 the end of a tentacle it adheres, and several tentacles combine to place 

 it on the mouth. Filter paper placed on the middle of the tentacles or 

 on the disk is sometimes swallowed, but not when placed on the tips of 

 the tentacles. It is disgorged within ten minutes. Indian ink shows 

 ciHary currents running toward the tips of the tentacles and fronds, and 

 on the disk toward the mouth. The animal is disturbed by light falling 

 on its base, and may move a short distance with snail-like movements. 

 But soon the tentacles catch hold of the substratum on all sides, and 

 with considerable writhing the anemone loosens the base aud walks on 

 its tentacles in an inverted position to a new place, where it rights and 

 attaches itself. Another reef anemone, Stoichactis lielianthus, was found 

 to crawl with snail-like movements similar to those of Metridium. 



Indian Ocean Fungiidse.|| — J. Stanley Gardiner revises the genera 

 of Fungiidaj, namely Fungia, Halomitra, Dbderleinia g. n., Herpolitha, 



* Proc. U.S. Nat. Museum, xxxiv. (1908) pp. 265-70 (5 figs.), 

 f Tom. cit., pp. 271-9 (11 figs.). J Tom. cit., pp. 305-19. 



§ Carnegie Inst. Washington. Year-book No. 7 (1908) pp. 127-8. 

 || Trans. Linn. Soc. (Zool.) xii. (1909) pp. 257-90 (7 pis.). 



Oct. 20th, 1909 2 r 



