Mr. J. Miers on some of the Heliotropiex. 121 
EXPLANATION OF THE PLATES. 
PLATE IX. 
Fig. 1. First stage of development of Pagurus*. 
Fig. 2. Second stage. The author gives this with the reservation stated, 
having taken it swimming in the open sea. ©, dorsal view of 
cephalon ; a, eye; b, superior antenne ; ¢, inf. ant. ; d, mandible ; 
g, posterior maxilliped; A, first pair of gnathopoda; /, second 
pair; 4, first pair of pereiopoda; /, m,n, 0, three posterior pairs 
of pleopoda ; p,q, ¢, pleopoda ; «, sixth pair of pleopoda ; z, telson. 
Fig. 3. Third stage, representing the genus Glaucothoé of Milne-Edwards 
and Prophylax of Latreille: n, penultimate pair of pereiopoda ; 
o, ultimate pair of pereiopoda; p, a pleopod; wu, sixth or poste- 
rior pair of pleopoda; z, telson; P, pleon of an older specimen. 
wg. 4. Zoéa of Porcellana platycheles : z, telson. 
PLATE X. 
Fig. 1. Phyllosoma. 
Fig. 2. Zoea of Palinurus marinus. 
PuaTE XI. 
Fig. 1. Typton spongiosus, n. sp. References as above. 
Fig. 2. Alpheus Edwardsi. 
Fig. 38. Mandible of Mika edulis. 
Fig. 4. Homarus marinus. Development of flagellum to lower antenna. 
Fig. 5. Tanais : h, first pair of gnathopoda, with branchial appendage 
attached. 
XI.— Observations on some of the Heliotropiee. 
By Joun Mirrs, F.R.S., F.L.S8., &e. 
In the ‘ Prodromus’ of De Candolle we find the order Borra- 
ginee divided into four distinct tribes, the Cordiew, Khretiee, 
Heliotropiee, and Borragee. Long before the appearance 
of that work, the late Mr. R. Brown had pointed out, in his 
‘ Prodromus,’ p. 492, that the Cordiew ought to be held as a 
distinct family, on account of their 4-fid style, and their seeds 
without albumen, with plicated cotyledons—an opinion sup- 
ported by Endlicher and Lindley for reasons which appear 
sufficiently valid. Von Martius rightly held that the perfectly 
gynobasic style, placed in the middle of four distinct ovaries, 
entitled the Borragee to rank as a separate natural order, and 
accordingly he combined the two remaining tribes of DeCan- 
dolle, the Hhretiew and Heliotropiew, in another family, which 
he designated with the name of Hhretiacew. 'The uncertainty 
and confusion in the distribution of the species in these several 
groups have in great measure arisen from a neglect to examine 
the structure of the fruits; it may, however, be taken as a rule 
that among the whole of them it is essential that the seeds 
* This was taken so young from the ovum that I am not certain whe- 
ther the long projecting rostrum is a feature or not, as at this period it is 
generally folded under. 
