r>ltO ^Ir. AV. T\. Fi.^luM — Xotes on AftcroiJea. 



6. IlYPEKLOiMius, Ogilly, 1S92. 



IJec. Austral. Mn?. ii. p. 2(5. 



Omnchetus, Ogilby, Proc. Linn. Soc. N.S.Wales, xxii. 1807, p. 72. 



Like Potamolosa, but no distint teetli, snpiamnxillaiy 

 brojul, and only 4 branch iosfcefrfils. 



A single specit s from New South Wales. 



Nyperloph us sprateUiJes. 



? Meletta norrp-hoVatirlice, Oiiv. & Val. Hist. Nat. Poiss. xx. p. 370. 

 ? Clupea viiidta, Casteln. (Macleav, Proo. Linn. Soc. N.S.Wales, iv. 



1880, p. 379). 

 Ht/perlopktis spratellides, Ogilby, Per*. Anstrol. ]\lnp. x. 189?, p. 26. 

 Hi/perh)phu4 copii, Ogilby, Proc. Linn. Soc. N.S.Wales, xxii. 1897, 



p. 72. 



Depth 4i to 5 in length, length of hear! 4^ to 4^. Dia- 

 meter of eye 3^ in length of head. Maxillary extending to 

 below anterior edge or anterior ^ of eye. About 28 gill- 

 rakers on lower part of anterior arch. Dorsal 15—17, 

 Anal 18-21. Pelvics 7-rayed, a little in advatice of dorsal. 

 Scales 46-48/11-12. Ventral scutes 19-21 + 12-14. Ver- 

 tcbrge 47. A silvery lateral band. 



9 specimens, 80 to 100 nim. long, including exam])les 

 received from Mr. Ogilby as //. spirit ell ides and H. copii. 

 Dr. Pellegrin has kindly examined the type of M. novce- 

 hollatidite, 118 mm. long. It is in bad condition, the scales 

 are lost, no dorsal series of scutes can be seen, no teeth are 

 apparent; the anal fin lias 22 raj's. 



LXII. — Notes on Asteroidea. — III. By W. K. FiSHER, 

 Director, Hopkins Marine Station, California. 



Ltsasteosoma, a npio Genus of Asteriidge. — Most nearly 

 related to Pycnopodut, Stimpson, but differing in having 

 d'sconnect(d marginal plates, with secondary intermediate 

 marginal ossicles ; broad mouth-plates and enlarged postoral 

 adanii)ulacral plates ; more conspicuous marginal circumspinal 

 sheaths, th'^ iiiferomarginals being common to 2 spines ; 

 adambulacral plates not sunken below level of inferomarginal ; 

 rays 5, instead of u])ward of 24. The rays are soft and 

 weak ; abactinal skeleton reduced to isolated, small, spini- 

 f rous plates, sometimes interspersed with vestigial perforated 



