On the Anatomy of Sacculina. 
313 
distended with ova, and adhering to the purse of a Cancer 
pagurus, 
SaccuUna injlata, Leuckart, fig. 15 (Wiegmann's Archiv,, 1859, 
p. 232.) 
Diagnosis. — Dorsi et ventris superficies multum arcuata est ; posteriore 
foramine a corporis margine aliquantura remoto : parasitica in Hyade 
araneo. 
I only know of this species through the description given 
of it by its discoverer. 
Bibliography, 
Cavoltni. Snlla Generazione dei Pesci e dei GrancM. 4to. 
Naples, 1787. 
Thompson, W. Entomol. Magaz., vol. iii. 1836. Pp. 452-456. 
Eathke. Beitr. zur Fauna Norwegens. 1842. Pp. 244-247, 
tab. 12, figs. 18, 19. Neueste Schriften der Nat. Ges. in 
Danz. 
Bell, Thos. A History of the British Stalk-eyed Crustacea, 
p. 108. 
Schmidt, 0. Das Weltall, No. 3. 1854. 
Steenstrup. Oversigt k. Danske Selsk. Forhandlgr. 1854. 
No. 3. Pp. 145-158. Archiv f. Naturg. 21 Jahr. 1855. 
Bd. i., pp. 15-19. Ann. of Nat. Hist. 2 ser. voL xvi. 1855. 
Pp. 155-62. 
DiESiNG. Systema Helm., vol. i. pp. 434-435, 
Leuckart. Wiegmann's Archiv. 1859. P. 232. Ann. of 
Nat. Hist., 3 ser. vol. iv. 1859. Pp. 422-429. 
LiLLJEBORG, WiLH. Nova Acta Reg. See. Sc. Upsal. Ann. of 
Nat. Hist., 3 ser. vol. vi. pp. 162-173, and pp. 260-267 
Explanation of Plate XIII. 
Fig. 1. Larva of Sacculina; first stage: a, eye; b, cesoplaageal ring?; c, horns 
of carapace ; d, first pair of feet ; d' , second pair of feet ; d"., third 
pair of feet ; e, terminal spines ; /, supposed anterior spines ; g, cen- 
tral cellular mass of the body. 
Pig. 2. Dissection of 8. triangularis : a, portion of external sac reflected ; 
b, peduncle ; c, ovario-branchial orifice ; d, horny disk ; e, corium ; 
h, internal ovaries ; i, ovigerous lamellae ; h, portion of peduncle 
prolonged beyond the horny disk; Z, vesicles ; o, tubercle of anterior 
surface. 
Fig. 3. Anterior surface of interior ovaries removed from their connections ; 
g, the septum ; A, mass of internal ovaries ; o, tubercle (oviduct ?) 
e, portion of adhering corium [these letters apply also to fig. 3'] ; 
I, the vesicles. 
Fig. 3'. Posterior view of internal ovaries of S. carcini. 
