OXYSTOMA (mACRURA). 
Crust, 24 
Eryonid.i*]. 
Polycheles typhlops (Heller) ?. Last periopods simple in male, chelate 
in female, from the ‘ Porcupine ’ Expedition, described by Norman, who 
thinks that possibly dimorphous males are to be found in the genus ; 
Willemoesia and PentacTieles are the female form, and the few male spe- 
cimens of both, mentioned by Spence Bate, are the second form of males 
with preponderance of female characters. The rudimentary eye, as 
described by Heller in Po/yc/ie/es, is different from that described by Bate, 
who is probably right. Ann. N. H. (5) iv. pp. 173-182. 
Amphion is probably the larva of Polycheles {Willemoesia) \ 
Boas, Zool. Anz. ii. pp. 266-258. 
Astaoid.®. 
Astacus fiiiviatilis. Monograph by Huxley (title, siiprd)^ abstract in 
Nature, xxi. pp. 353-355. 
Asfacus JJ.uviatilis (F.) moults at Neuchatel three times in the year, 
but only once in the first year ; it becomes mature for generation in the 
fourth year ; copulation takes place in November. Rougemont, Bull. 
Soc. Neuch. xi. p. 401. 
For physiological observations on it, see above, in General Subject. 
The species, habits, and geographical distribution of the crayfishes 
living in Southern Russia, chiefly in and near the Ural, are discussed by 
Malachow, Hor. Ent. Ross. xi. pp. 27-44. 
Astacoides serratus (Shaw), “ The Murray Lobster ” described and 
well figured by F. McCoy, Prodr. Zool. Viet., Dec. ii. [1878], p. 17, 
pi. XV. : A. armaius (Martens), and ? A. spinifer (Heller), are referred to 
it. A. hicarinatus (Gray) ; id. op. cit. iii. p. 45, pi. xxix. 
Cambarus pellucidus (Tellkampf). On its eye, see Anatomy, &c., 
supra, p. 6. 
CkANGONIDA']. 
Paracrangon ecliinatus (Dana), from Japan ; Miers, P. Z. S. 1879, 
p. 52. 
Sabinea septemcarinata (Ross), and sarsi, sp. n., S, I. Smith, Tr. Conn. 
Ac. V. pp. 57-60, pi. xi. figs. 5-13, both in New England, 26-60 fath., 
and also Lofoden Islands, Norway, the former more common, and also 
found in Greenland, Iceland, and Spitzbergen. 
Atyid^e. 
Caridina typus (M.-E.), from Rodriguez Island ; Miers, in Zoology of 
Rodriguez, Crusiaceaj p. 8. 
