262 BULLETIN OF THE 



obtained the larvae of one of the British species from the eggs, and gives a rude figure 



of the first stage of the zoea. 



Couch, K. 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. /, g, h. 1853. Couch reared the larvae of Porcellana jolatychelcs from 

 the egg, but it is difficult to understand his confused account and figures as repro- 

 duced by Bell. It appears as if Fig. /, 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, F£lix. Observations sur les metamorphoses de la Porcellana longicornis, 



et description de la Zoe, qui est la larve de ce crustace. Comptes Rendus, XVI. 



pp. 1204-1207. 1843. 



First stage of zoea, obtained from the eggs. The Jwrns of the carapace are described 



Dana, J. D. United States Exploring Expedition. Crustacea. Pp. 684, 685. PL 



45, Fig. 12. 1852. 



Dana's Zoea longispina, taken in the Sooloo Sea, Feb., 1842, is doubtless the larva 

 of a Porcellana. 

 MtXLLER, Fritz. Die Verwandlung der Porcellanen. Archiv fur Naturgeschichte, 



1862, 1, pp. 194-199; Taf. VII. 

 Fur Darwin, 1864. (Eng. Trans, p. 53, Fig. 24. 1869.) 



Miiller observed the zoeae of three species at Desterro, Brazil, in two stages of devel- 

 opment. His first stage, with simple first antennae and lack of appendages back of 

 the second maxillipeds, is probably the earliest stage of the zoea after quitting the 

 egg. The second form is doubtless the last zoea-stage, as Miiller himself suspected, 

 although he did not rear it into the Porcellana. Miiller 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 Befbrderung 



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. 1-13. 1876. 



Describes zoeae from the Mediterranean Sea and the Atlantic Ocean in three devel- 

 opmental stages. In the second of these stages the first antennae 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 zoea-stages (see above, p. 259). 

 Dohrn, Ant. Untersuchungen fiber 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. 373 ; Taf. XXX. Fig. 52, 1871), and by Claus himself under the name of Pluteoca- 

 ris (Untersuchungen fiber Crustaceen, p. 65 ; Taf. XII. Figs. 1 - 7) ! Claus' refer- 

 ence, moreover, is incorrectly " Froriep's Notizen" instead of "Isis." 



