DECAPODA (brachyuea). Crust. 16 
Ru.ssian) of the animals hitherto called Megalopa and Blonolepis^ and 
allied forms, which are all the larvae of Brachyurous Crustacea ; and he 
describes (in Latin) a number of such forms observed in the Black Sea, 
giving them generic and specific names and guessing in some instances as 
to the genus of Brachyura^ of which they may be the larvae ; these names 
Protomonolepis suhquadratus, g. & sp. nn., p. 18, pi. ii. fig. 1, Hetero- 
grapsus lucasi? ; Paramonolepis intermedius, g. & sp. nn., p. 19, pi. ii. 
fig. 2, Euchirograpsus ? ; Pseudomonolepis ponticus, g. & sp. nn., p. 22, 
pi. ii. fig. 3 ; Protodesmarestia maculata, g. & sp. nn., p. 23, pis. ii. & iii. 
fig. 4, Eriphia spinifrons ? ; Paradesmarestia (g. n.) prototypa, two 
varieties from the Black Sea, a third from the Sandwich Islands, 
pp. 35-37\ pi. iii. figs. 5 & 6 ; Dohrnia cornuta, g. & sp. nn., two forms, 
p. 28, pi. iii. figs. 7-9. He also gives short descriptions of all known forms 
of this kind, or the so-called genera Megalopa (Leach), Oyllene (Dana), 
Desmarestia (Dana), Monolepis (Say),' and Trihola (Dana), proposing 
also here some new generic names for larval forms, as : — 
Sp)inaria, g. n., for Megalopa armata (Leach) and valdiviana (Phil.), 
the one belonging to Carcinus mcenas (L.) and the other to Cancer irror- 
ratus (Say), pp. 29 & 30. 
Cyllenula thompsoni, g. & sp. nn., for the larva of Portunus (mar- 
moreus ?) (Leach), described by Thompson, 1836, p. 32. 
Tricuspidella, g. n., for Megalopa sculpta (Leach), p. 38. 
Acanthotribola steno [r~\ rhyncha, g. & sp nn., for Thompson’s larva of 
Macropodia [^Sienorrhynchus~\ phalangium, p. 39. 
Paratribola, g. n , for the larva called Cancer ferroensis by O. Fr. Miil- 
ler, p. 43. 
Quadribola, g. n., for Megalopa maculata (Leach). 
Hemisphcerium spinosum, g. & sp. nn., for a larva not before described 
from the East Indies, p. 40. 
liyadella rathkei^ g. & sp. nn., for the larva of Hyas araneus^ described 
by Rathke, 1840, p. 41. 
Dromiella, g. n., for the Megalopa of Dromia, described by Claus, 1876, 
p. 44. : 
Pseudocyllene, g. n., for the Megalopa of Portunus, described by Claus, 
1876, p. 44. 
A synoptical table shows the chief differences of all these forms. 
Inachidai]. 
Metoporrhaphis forjiculatus, sp. n., A. Milne-Edwards, Miss, scientif. 
M6xiq. V. p. 174, pi. xxxi. fig. 3, Guiana. 
' Collodes depressus and obesus, spp. nn., Florida, rostratus, Coast of Pata- 
gonia, 41® 41' S. lat., and inermis, sp. n.^ Brazil, id. 1. c. pp. 176-179, 
pi. xxxii. figs. 1-5. 
Arach7iopsis filipes (Stimps.), id. 1. c. p. 181, pi. xxxiii. fig. 1, Florida, 
35-45 fath. 
Euprognatha rastellifera, inei'mis, and grgcilipes, spp. nn., West Indies, 
80-95 fath., id. 1. c. pp. 182-184, pi. xxxv. figs. 1-3. 
Apocremnus, g. n., id. 1. c. p. 184 (commencement only). 
