DEOAPODA. 
219 
The copulation of the Decapod Crustacea is discussed by the" same 
author, who thinks it improbable that true copulation is effected in the 
Macrura, and quotes the observations of many naturalists and fishermen 
on the point ; 1. c. pp. 44-49. The copulation of the Brachyura is 
described; id. 1. c. pp. 113-116, pi. xvi. figs. 98-104. 
The spermatozoids of the Macrura are immobile vesicles with a 
styliform appendage ; id. 1. c. p. 50, pi. xiii. fig. 7, pi. xiv. figs. 30-32 & 
36-39, pi. XV. fig. 43. Those of the Brachyura vary considerably in 
shape ; id. 1. c. pp. 115 & 116, pi. xviii. fig. 147. 
iNACHIDiB. 
Leptopodia sagittaria^ male appendages ; Brocchi, 1. c. p. 88, pi. xix. 
fig. 176. 
Camposcia retusa, male appendages ; id. 1. c. p. 89, pi. xviii. fig. 156. 
Eurypodius sp., male appendages ; id. 1. c. p. 90, pi. xviii. fig. 166, and 
pi. xix. figs. 177 & 178. . 
MAIIDiB. 
Lihinia canaliculata, male appendages ; id. 1. c. p. 91, pi. xix. figs. 179 
& 180. ■ ^ 
Hyas araneus (L.). On its parasites ; Macintosh, Mar. Invertebr. of 
St. Andrews, p. 162. Male appendages ; Brocchi, 1. c. p. 93, pi. xix. 
figs. 187 & 188. 
Maia sguinado, male appendages and spermatophores ; id. 1. c. p. 95, 
pi. xviii. figs. 144-148. 
Mithrax verrucosus, male appendages; id. 1. c. p. 94, pi. xix. figs. 185 
& 186. 
ParamitJirax sp., male appendages; id. 1. c. p. 95, pi. xViii. figs. 
150-152 & 164. 
Lissa chiragra, male appendages ; id. 1. c. p. 92, pi. xviii. figs. 153 
& 154. 
Naxia diacantha, male appendages ; id. 1. c. p. 94, pi. xix. figs. 172 
& 173. 
Acanthonychid.®. 
Acanthonyx lunulatus (Kisso),'male appendages; id. 1. c. p. 98, pi. xix. 
fig. 181. 
PARTHENOPID.E. 
Lamhrus contrarius, male appendages ; id. 1. c. p. 98, pi. xviii. figs. 166 
& 167. 
Cancrid.®. 
Lophactcea granulosa, male appendages; id. 1. c. p. 71, pi. xvii, 
fig, 138. 
Chlorodius samoensis, sp. n., Miers, Ann. N. H. (4) xvi. p. 341, Samoa 
Islands. 
