DECAPODA (mACRURA). Crust. 23 
Pontonia flavo-maculata (Heller) found living in Ascidians; Giesbrecht, 
MT. z. Stat. Neap. iii. p. 295. 
Rippolyte spinus (Sow.) =. sowerbii (Leach), Arctic Sea; Hoek, Crust. 
* Willem Barents,’ p. 15, pi. i. fig. 4. 
Bythocaris payeri (Heller), id. 1. c. p. 19, pi. i. figs. 8 & 9, Arctic Sea. 
Richardina , g. n., cervical furrow girt with short spines ; blind. R. 
spinicincta, sp. n., Atlantic, A. Milne-Edwards, Rapp, faune sous-marine, 
p. 41. 
Anchistia tenella, sp. n., S. I. Smith, Bull. Mus. C. Z. x. p. 55, pi. ix. fig. 1, 
East Coast of United States, 32° N. lat., 229 fath. 
Palaimon olfersi (Wiegm.) = spinimanus (M.-Edw.), variations and 
sexual differences, the fingers of the second pair of periopods hooked in 
the male, joined in a straight line in the female; common in rivers of the 
Island of St. Thomd, W. Africa ; Greeff, SB. Ges. Marb. 1882, pp. 30-35. 
Palaimon. Critical notes concerning the distinction of the species 
P. mayottensis, reunionensis, and longimanus (Hoffm.), united into one 
species, by Lenz & Richters, Beitr. pp. 7 & 8. 
Palccmonetes varians (Leach), description and varieties by A. Garbini, 
Bull. Soc. Ven. Trent, ii. pp. 102-109, and Bull. Soc. Ent. Ital. 1882, 
p. 389 ; its nervous system by the same, Atti Soc. Yen. Trent, vii. 
pp. 179-199. 
Chlorotocus , g. n., A. Milne-Edwards, Rapp, faune sous-marine, p. 18, 
Coast of Morocco, 322 metres. 
Acanthephyra purpurea, sp. n., id. 1. c, p. 41, Atlantic, 2590 metres. 
Pen,eid;e. 
Penceus : on its metamorphosis ; Brooks, Hopkins University Circular, 
No. 19, p. 6. 
Penceus siphonocerus (Otto), found in the Adriatic ; Stossich, Bull. Soc. 
Adr. vii. 
Sicyonia , 2 species without name from Australia; Haswell, Cat. Austral. 
Crust, pp. 204 & 205. 
Benthesicymus ? bartletti, sp. n., S. I. Smith, Bull. Mus. C. Z. x. pp. 81- 
86, pi, xiv., East Coast of United States, 39° N. lat., 732 fath., from a 
single mutilated specimen, branchial formula differing from that given 
by C. Spence Bate. 
Amalopenceus , g. n, The whole integument membranaceous, very soft 
and thin ; carapax, eyes, antennulse, antennae, mandibles, and maxillae 
nearly as in Benthesicymus : merus of the second maxilliped expanded 
along the inside into a thin lamelliform plate, which conceals the three 
distal segments when they are flexed ; first three pairs of thoracic legs 
nearly equal, but ischium and merus of the first compressed and ex- 
panded ; no ectopod at the base of any of the thoracic legs. A . elegans , 
sp. n., East Coast of the United States, 31-39° N. lat., 372-1632 fath. 
S. I. Smith, l. c. pp. 86-91, pis. xiv. figs. 8-14, and xv. figs. 1-5. 
Hymenopenceus, g. n. The whole integument membranaceous, exceed- 
ingly thin and soft ; carapax slightly compressed, not conspicuously 
keeled on the posterior part, with four large and acute lateral spines on 
