202 BULLETIN OF THE 
obtained the larvx of one of the British species from the eggs, and gives a rudo figure 
of the first stage of the zoéa, 
Covcn, R. Q. “On the Metamorphosis of the Decapod Crustaceans, Ann, Rep. 
and Trans. Cornwall Polytechnic Society, 1843.” 
An account of Couch’s observations (I have not been able to see the original paper) 
is given in Bell's ** History of the British Stalk-eyed Crustacea,” Introduction, pp. 
lv -lvii, Figs. f, g, ^. 1853. Couch reared the larve of Porcellana platycheles from 
the egg, but it is difficult to understand his confused account and figures as repro- 
duced by Bell. It appears as if Fig. f, which is said to represent the larva on its 
first escape from the egg, must represent one prematurely extracted from the egg 
while still clad in the intra-oval veiling membrane, with the rostrum folded under 
the breast. 
DUJARDIN, Fénix, Observations sur les métamorphoses de la Porcellana longicornis, 
et description de la Zoé, qui est la larve de ce crustacé. Comptes Rendus, XVI. 
pp. 1204-1207. 1843. 
First stage of zoéa, obtained from the eggs. The horns of the carapace are described 
as segmented. 
Dana, J. D. United States Exploring Expedition. Crustacea. Pp. 684, 085. Pl. 
45, Fig. 12. 1852. 
Dana’s Zoéa longispina, taken in the Sooloo Sea, Feb., 1842, is doubtless the larva 
of a Porcellana. 
MüuLER,Fnrrz. Die Verwandlung der Porcellanen, Archiv für Naturgeschichte, 
1862, 1, pp. 194-199; Taf. VII. 
Für Darwin, 1864. (Eng. Trans. p. 53, Fig. 24. 1869.) 
Müller observed the zo&e of three species at Desterro, Brazil, in two stages of devel- 
opment. His first stage, with simple first antenne and lack of appendages back of 
the second maxillipeds, is probably the earliest stage of the zova after quitting the 
egg. The second form is doubtless the last zoéa-stage, as Müller himself suspected, 
although he did not rear it into the Porcelana. Müller did not fail to see the 
Brachyuran character of the development of Porcellana. 
CLAUS, CARL. Ueber den Entwicklungsmodus der Porcellana-Larven im Vergleiche 
zu den Larven von Pagurus. Sitzungsberichte der Gesellschaft zur Beförderung 
der gesammten Naturwissenschaften zu Marburg. 1867, pp. 12- 16. 
Untersuchungen zur Erforschung der Genealogischen Grundlage des Crus- 
taceen-Systems, pp. 57-59; Taf. VII. Figs. 1-18. 1876. 
Describes zoëæ from the Mediterranean Sea and the Atlantic Ocean in three devel. 
opmental stages. In the second of these stages the first antennw are still unseg- 
mented, the third maxilliped and the five pairs of ambulatory limbs exist in the shape 
of six pairs of short sacs, This is apparently a younger stage than the earliest ob- 
served by me, in which the abdominal legs have already appeared. Claus’ first and 
third stages are the earliest and last zoda-stages (see above, p. 259). 
Donen, Ant. Untersuchungen über Bau und Entwicklung der Arthropoden. 
11. Zweiter Beitrag zur Kenntniss der Malacostraken und ihrer Larvenformen, 
Zeits. Wiss. Zool. XXI. pp. 372, 373; Taf. XXIX. Figs. 48-51. 1871. 
p.973 ; Taf. XXX. Fig. 52, 1871), and by Claus himself under the name of Pluteoca- 
ris (Untersuchungen über Crustaceen, p. 65 ; Taf. XII. Figs. 1-7)! Claus' refer- 
ence, moreover, is incorrectly ** Froriep's Notizen" instead of “Isis,” 
