56 
“TERRA NOVA EXPEDITION. 
regards this point, the accounts of A. striata are somewhat obscure. Mobius says that 
the proboscis is “ fast so lang wie der Rumpf,” but his figures show it as either about 
half or two-thirds as long. Bouvier describes it as “legerement plus longue que le 
tronc,” and figures it as little more than half as long. Both authors agree, however, 
that the proboscis is curved downwards, while in our specimen it is straight. Further, 
the abdomen is horizontal, the oviger more slender than in Bouvier’s figure, and with 
the penultimate segment more nearly equal to the terminal one, the propodus has 
three or four very large spines on its inner edge, and the auxiliary claws are not 
more than one-fourth of the length of the main claw. The other characters, so far 
as they can be determined, are in general agreement with the accounts of A. striata. 
No fully adult specimen of this species appears to have been figured. Bouvier, 
although he enumerates only adults as having been taken by the “ Pourquoi Pas?”, 
figures a male with chelate chelophores, and, therefore, presumably immature. 
Genus ACHELIA, Hodge. 
Hodge, 1864, p. 114. 
Hodgson (191 Ou, p. 436) having revived the name Achelia, Bouvier (1913, pp. 46 
and 138) has restricted it to those Ammotliekhe that have eight segments in the palp, 
giving at the same time a warning that certain earlier names might have a claim to 
supersede it. The validity of these earlier names depends on the identification of species 
from European seas that cannot be discussed here, and 1 am content to follow Bouvier 
in using Hodge’s name for the genus A' 
Hodgson (1914—15, p. 147) has proposed a new genus Austrotliea for two species 
which appear, from an examination of his type-specimens, to differ in no respect from the 
typical form of Achelia except that they have well-separated lateral processes and longer 
legs, it is clear that these characters by themselves cannot furnish a basis for generic 
distinction, and, in fact, the present collection gives evidence that they are subject to 
variation within the limits of a species. I propose, therefore, to regard Austrotliea as a 
synonym of Achelia. Of the two species of Austrotliea described by Hodgson, one, 
A. spicata, is represented by many specimens in the “Terra Nova” collections and is 
redescribed below ; the other, A. tjernianica, is described by Hodgson from a very young 
specimen with chelate chelophores, and 1 can express no opinion on its specific 
distinctness ; like specimens of similar age in the present collection, it has the ocular 
tubercle very tall, slender, and acutely conical. 
More than a hundred specimens belonging to this genus were obtained by the 
* It may be pointed out, however, that the identification of Costa’s Alcinous vulgaris with Dohrn’s 
Ammothea franciscana, which Bouvier adopts apparently from Norman, might justify, although it does not 
compel, the use of Alcinous ; also that, in identifying the still earlier Paribcea spinipalpis, Philippi, with 
Achelia echinata, Hodge, Bouvier, by omitting the mark of interrogation placed by Norman against this 
identification, surrenders our last defence against the revival of Philippi’s generic name. See, however, 
Schimkewitsch (1913, p. 605). 
