284 
CRUSTACEA. 
Lepadidje. 
Ornitholepaa australis (Targioni) [see Zool. Rec. ix. p. 204], is recog- 
nized as only a larval stage of a Cirriped ; Gerstacker, SB. nat. Fr. 
1875, pp. 113-115. 
The larvae of Lepas^ during the Nauplius-stage, live several feet below 
the surface ; in the Cypris-stage, on the surface adhering to the shells 
of Velella ; Willemoes-Suhm, Z. wiss. Zool. xxvi. pp. cvii. & cviii. 
Balanus improvisus (Darw.), crenatus (Brug.), balanoides (L.), hameri 
(Asc.), Verruca strcemia (Mull.), and Lepas anatifera (L.), fully described, 
from the Netherlands, and anatomical details of the first figured; 
Hoeck, 1. c. pp. 6-36, pi. i. 
Peltogastriu^.. ^ 
-Theoretical considerations on the relations betweeen the Cirripeds 
and Rhizocephala (Peltogastridce) and the transmutation of the organa 
of fixation in the former to the suctorial organs of the latter, 
exemplified by Anelasma squalicola, are published by A. Dohrn in his 
pamphlet, “ Uber den Ursprung der Wirbelthiere und das Princip des 
Funcktionswechsels,’' Leipzig : 1875, 8vo, pp. 77-87 ; he mentions at the 
close of this paper some oral communications made by himself to Koss- 
mann on this subject, and the latter defends the originality of his own 
work in Arb. Inst. Wiirzb. ii. pp. 510-515. 
Thompsonia globosa (Kossmann). Semper maintains his former state- 
ment, that the larva leaves the egg in the Oypridina-form ; Arch. Z. 
exper. iv. p. viii., and Ann. N. H. (4) xv. pp. 83 & 84 [c/. Zool. Rec. x. 
p. 196]. 
Sacculina carcini (Thomps.) and an undetermined (perhaps new) species 
on Portunus holsatus (F.) ; Macintosh, Mar. Invertebr. of St. Andrews, 
pi. ix, figs. 13, 14 & 15. ' 
XIPHOSURA. 
A. S. Packard has observed the development of the nervous system 
in Limulus ; it makes its first appearance after the first moult of the 
blastoderm and before the appearance of the legs, and is quite separate 
from the outer or so-called nervous layer, as in Hydrophilus ; afterwards 
five separate ganglions are found in the cephalothorax, corresponding to 
the five anterior pairs of legs, and the brain is situated before, not 
above, the oesophagus. A previously unknown symmetrical organ of 
bright red colour situated on each side of the stomach, and regarded as 
a kidney, is described. Am. Nat. ix. pp. 422-424,611-514,589-592, 
abstract in Ann. N. H. (4) xv. pp. 255-258, and J. Zool. iv. pp. 233-236. 
ARANEIFORMIA. 
Nymphon spp. common in dredgings on the French coast in 100-200 
metres ; Fischer, J. Zool. iv. p. 300, footnote. 
Nymphon gracilipes^ styligerum^ and brevicaudatum^ spp. nn., Miers, 
Ann. N. H. (4) xvi. pp. 76 & 117, Kerguelen’s Island. 
