IIARPACTTD;E CALIGIDiH. 
203 
Metis ignia (Phil.) described, id. 1. e. p. 60, Christiansund, Norway. 
CoRYCiPlIDiE. 
Macrochiron [gaKpox^ip (with no neuter) = longimanus ] Macrochirus^ 
Schdn. Col. 1838, Swains. Pisces^ 1839, -chires, Nitzsch, AvcSj and -chirn, 
Zett. Dipt. 1840], g. n. Lower maxillipeds very long and powerful j first 
three pairs of swimming-feet equal. M. fucicolum^ sp. n., Brady, 1. c. p, 9, 
pi. 3. figs. 9-18, Ryhope and Sunderland, England, near low-water mark. 
NotodelphidvE. 
The Recorder has thought it advisable to give an abstract of the characters 
of the following 6 genera (the males of the species of which are all unknown), 
published by Ilesse, Ann. Sc. Nat. (6) xv., and briefly noticed in Zool. Rec. 
viii. p. 194 : — 
Megasanoixus [potius Megalanoexis] : 1st thoracic segment obovate, as long 
as the 3 following together; 4th segment much narrower than the preceding, 
and the 1st abdominal forming a strong strangulation in the middle of the 
body ; 2nd abdominal segment broader than thorax ; four pairs of 2-branched 
foot, their terminal joint choliform, very flat. 
SIPHONOSTOMA. 
ERGASILIDiE. 
Megalohrachinus : anterior feet very long ; eyes situated on the underside 
of the carapace at the front of an oval protuberance with depressed centre. 
Macroh'achinus : anterior feet very long, with a prehensile claw ; eyes very 
small, on the forehead ; first thoracic segment rhomboidal, the following gra- 
dually smaller ; mouth in the middle of the underside of the first thoracic 
segment,'at the base of a pear-shaped protuberance. 
Mdopocataeotinns : first thoracic segment oblong, very Inrgo, its front edge 
4-notched ; eye small, median ; feelers with numerous feathered fine hairs ; 
3 pairs of strong natatorial feet. 
CaLIGIDA5. 
Hcema\to']philus: first thoracic segment oval, very large; the 3 others 
forming a round disk ; a pair of slender feet at the base of the first segment ; 
the next pair of feet divided into 3 branches. 
Metoponanaphrissontes [rectius Metopanophrissori] : first joints of the 
feelers with bristly pectinated hairs and longer sharp stings ; three thoracic 
segments gradually decreasing in size. 
XIPHOSURA. 
Packard’s paper on the development of Limuhis polyphemus 
was publislied fully in Mem. Post. Soc. ii. pp. 155-202, pis. 3-5, 
issued March 1872. To the report in Zool. Rec. viii. pp. 195, 
196, may be added that the palaeontological evidence concern- 
ing the history of the various orders of Crustacea is duly pointed 
out, the author coming to the conclusion that the Merostomata 
{Limuhis) are most nearly allied to the Trilobiteej from which 
