260 — Dr. Burnett's Reviews and Abstracis 
also showing that the strangely shaped coccyx is a true vertebra. 
We have thus but imperfectly indicated the contents of the work 
under notice. It could scarcely be otherwise, for the various sub- 
jects in the different sections are treated so connectively from par- 
agraph to paragraph, that full justice to the author’s labor could 
admit. However, the purpose of this notice will be accom- 
plished if we succeed in calling attention to one of the ablest of 
recent researches. 
Il. The Hectocotylus of the Cephalopoda. 
Delle ena ane sulla Storia et Notomia degli animali senza vertebre del 
regno 0 di Napoli, 1825, p. 223, Tav. xyi - ee int 
vier, A, es Sc. Nat. xviii, 1829, p. 1 A. fig. 
Costa, n. des Se. Nat. 1837, p. 172 ian "id Tea Xvi, Ee "iss, PL. 13, fig. 2, ac. 
Kile, Mist s Nat. Hist., xvi, 1845, p. 414, also, Bericht von der zooto tomischen 
~ zu Wiirtzburg, Leipzig, 1849. p- 67, Taf. i, ii; 3 Transact. Linn. Soc., 
Sito, Lebrbech der he ot Fseon Anatomie a evirseniat Thiere, Berlin, 
362. Also Zeitsch, fiir wissensch. Zool. 
Power, (Madame) Salk macs Mediterranéens. Jere ari Genes, 1847-51, p. 34, 
Vovany ie Tort ee. des Sc. Nat. ides sth aes p. 146. PL. vi- 
Hi. Miiller, Ann. des Se. Nat., 1852, xvi, p. 132, ee in cite in the Zeitsch. 
fur wissenschaftl. Joa, iv, p. 1, Taf. 3 i, and p. 3 
The Hectocotylus is a worm-like past which is found attached 
like a parasite to certain forms of Cephalopoda, ( Octopus, T'rem- 
us, Argonauta.) The subject has attracted so much atten- 
tion from its curious nature that [ have thought best to indicate 
its historical relations by the above list of authors and papers. 
hey will, moreover, serve as texts to some little account of 
this zoological anoma 
hese bodies in question, which are vermiform, but which re- 
semble distinctly no animal whatever, are found attached by @ 
sucker, in the cavity of the mantle of certain cephalopods. It 1s 
not strange that some of the observers first named should have 
regarded then as parasitic worms, and although presenting evi 
dently, anomalous anatomical parts, Cuvier concluded by pro- 
nouneing it “un ver vraiment extraordinaire.” 
But it soon appeared as a remarkable fact that the cephalopods 
on which these bodies were found were invariably of a certain 
kind, and furthermore, that from the most careful search, no males 
were seen. EF rom this, K6lliker was led to regard them as male 
ce dss ofa remarkable nature. This su position was con- 
by his anatomical researches, for he showed that the - 
cee of these forms had, in many respects the characteristics 
of the cephalopods alone; bosiiins containing distinct spetmatic 
and cone parts, It was then evident that these curious 
e of a true cephalopod nature and serve the - 
tion of enna But it was a question of both p 
