174 
MOLLUSC A. 
in Trachydermon album (L.) ; not perceptible from the outside, very small 
and a little higher up, and exactly in the median line in Tr. ruhrum (L.). 
The orifices for the eggs are bilaterally symmetrical, two or three fenes- 
tr83 on each side, near the last gill ; the author could not satisfy himself 
that there is a true oviduct ; perhaps the eggs pass by dehiscence of the 
ovary into the perivisceral cavity, from which they are expelled through 
the fenestras. W. Dali, Bull. Ess. Inst. vi. Aug. 1874, and Ann. N. H. (4) 
XV. pp. 442, & 443. 
TEOTIBBANOEIA, 
ToRNATELLIDJ]. 
Ringicula acuta (Phil., 1849) = minuta (H. Ad., 1870), Persia, and R. 
abbreviata, sp. n., Ceylon ; Nevill, J. A. S. B. (n.s.) xliv. pt. 2, p. 102. 
Tornatella fasciata, Lam. The description and figure of the radula 
given by Loven repeated by Troschel, Gebiss der Schnecken, ii. p. 162, 
pi. xiv. fig. 12. 
[Tornatella] Actceon exiguus (Dunker, MS.) and 8plendidula[-us]y 
spp. nn., Morch, Mai. Bl. xxii. pp. 169 & 170, West Indies. 
Bollida^. 
Cylichna krebsi, Morch, 1. c. p. 172, West Indies ; C. pertenuis^ E. 
Smith, Ann. N. H. (4) xvi. p, 113, North Japan ; C. athimoniy J. E. Teni- 
son Woods, P. R. S. Tasm. 1876 (sep. copy), p. 24, Tasmania : spp. nn. 
Retusa omphalis^ sp. n., Morch, 1. c., St. Thomas, West Indies. 
Atys riiseana^ sp. n. (Dunker, M.S.), id. 1. c. p. 173, West Indies. 
Haminea grisea^ sp. n., E. Smith, 1. c. p. 112, North Japan. 
Lophocercid.®. 
Volvula persimiliSf sp. n., Morch, Mai. Bl. xxii. p. 179, West Indies. 
APLYSIIDiE. 
Aplysia punctata (Oav.) ; Macintosh, Mar. Invertebr. of St. Andrews, 
pi. iii. fig. 1. 
Aplysia tasmanica, sp. n., J. E. Tenison Woods, P. R. Soc. Tasm. 1876 
(sep. copy), p. 24, Tasmania. 
Phyllaplysia lafonti (Fischer) ; a new variety of 36 mill, length 
described, and its manners of life observed, by H. Crosse, J. de Conch, 
xxiii. pp. 101-104. 
PLEUROBRANCHIDiE. 
[Umbrella] Operculatum bermudense, n., indicated, but not suffi- 
ciently described by Morch, Mai. Bl. xxii. p. 179, Bermudas. 
