64 Moll. 
MOLLUSCA. 
peronii, Lmk.), the other species which have been referred to the genus 
discussed, and their positions determined ; id. t. c. 
Loligopsis schneeha genii, sp. n., Chili, Pfeifer, (288) p. 28, fig. 31. 
PTEROPODA. 
Gymnosomata. 
Wagner (373), on the basis of his investigations into Clio borealis and 
comparison with other forms, places the Pteropods between the Hetero¬ 
pods and Cephalopods, and divides them into three groups : I. Pt. alato.i 
( Cymbulia, Tiedemannia ) ; II. Pt. pterocephala ( Criseis , Cavolinia, 
Eyalea ) ; III. Pt. deutocephala {Clio, Pneumodermon, Spongobranchus). 
Three individuals of Clio borealis, not two, are concerned in copulation. 
Anatomy is fully treated. 
Clione limacina , Phipps, figured by Krause, (216) p. 298, pi. xviii. - 
figs. 1 9b-d ; C. dalli, sp. n., id. t. c. pi. xviii. fig. 19a. 
Cliopsis, Troschel, is a well-marked genus ; has a terminal gill like 
Pneumodermon, formed of a low circular collar ; no lateral gill; penis of 
Troschel is an elongated buccal tube. Boas, (25) p. 6b9. 
Cirrifer, Pfeifer, appears from examination of type to be a badly pre¬ 
served Pneumodermon ; id. t. c. p. 690. 
Dexiobranchcea, g. n., id. t. c. p. 688 ; for Pneumodermon ciliatum , Grbr. 
Only possesses one gill, the lateral gill of Pneumodermon, which is repre¬ 
sented by a well-developed triangular cutaneous process; has two arms 
with suckers which appear here shortened and modified. 
Spongiobrancbcea elongata, d’Orb., should be referred to Clione ; id. t. c. 
p. 688. S. australis , d’Orb., is, however, the type of a well-marked genus 
allied to Pneumodermon ; id. ibid. 
Thecosomata. 
Macdonald (240) corrects the mistaken views of previous observers who 
have depicted Cymbulia with the toe of the s'ipper anteriorly, and gives 
an enlarged figure of the animal with expanded fins. 
Eyalea, occurrence of off New Zealand ; Winkelmann, N. Z. J. Sci. ii. 
p. 484. Eyalcea ( E. tridentata, Lmk.?), lat. 40°, long. 14° W. ; Krause 
(216) p. 300. 
GASTROPODA. 
PULMONATA. 
STYLOMMATOPHORA. 
GEOPEILA. 
Heynemann (178), under the title “Naked Land Pulmonates,” confines 
his attention to those which “ bear either no shell or one which is not 
spiral,” and gives a summary of their distribution, with lists for the 
different countries. 
